1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e1035565b80f810b76031cb7d1d3c38527c4e31c622f36bf3bdc16b65a2034. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89c8d4f3-4527-445f-b5bc-9589450edc90.json and https://artists.proofprofile.net/proofs/artist/89c8d4f3-4527-445f-b5bc-9589450edc90.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3906675dd1c7897dbcdf425c4548c570f09be8f86ed9beef98f8a3dd04b4bd39. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNRS1534625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c332f0be2a1999d5a90e9b82bfd8b649aade4de9d3a39cbb818f240f6d88c04. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACJ1517199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cea8e78b92d1a612bbfe87a0a3de1f3aa210a666d9153c0feeda5bf819a0b69. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACJ1517201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a636efe8bc88c47c0fd9a6ef815800a50b657b3b4a02daf784f07a696a6ad18. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACJ1522499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a91a2385ab38e6760f6b0112ea1799e9ff8756b2628ca39f1fba8fa3d0761f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLZ541501036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0411cdac36f0dd9961705f8dd29b25b933cdbb9805694e03b38beab4fe2404b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1734058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68a672d982be95b9717d319cfe73572d5d0909b7079a57709b2828987c476b4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1734069.
Bittersweet Emotion (Qrion Remix) [feat. Josh Tobias]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5913fab661ab4c1b3ed99302a783f611f9e5520428e5ee48109ec7d3300031c9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACZ1727930.
Higher (feat. Millie Go Lightly) (feat. Millie Go Lightly)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85afda892f2fc8b05c49fd833f78e42324de4683187b6437eea87b6543d01fb4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUS11700384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846b387b696d1334206de32d8e4afd4e306d71c77070d501840f64ce1b8d1d00. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S1802339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1a730e1eb79600e87463dbd6129d293ad74a6e11dd07b80d578d551ff329a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ8GX1700185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726ac8e8a4ee16d86d90c1e2184b27890e44a969c55f8f32f11b716a924d49cf. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ8GX1700184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0fe40f73b99d060fe0727a154f237a9a7c0dd6a84b77b23a240e667b54448e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1982292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc609e62c53af694a5af31902ad1cae72b129158dd9c8ac6dc89c5171ff01280c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1982309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26082fcc3ab541815501aa5cf45b45e4af7487f219acad3198d2a94348c17fe4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1915356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c353c7bba6354423e987dfaaf60a2be422b7930dd2e734874cdf85868b864e3. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1982307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f349594e96d8be82e5af1d66e69f9cc53b30e895aad694721b1732b5d2db02. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1915381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0fe40f73b99d060fe0727a154f237a9a7c0dd6a84b77b23a240e667b54448e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:19:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1982292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb4a3f67b8ec9ca8c9f2f4c3aab5b2d08b7e954cf6c33592f2a1a1b43e9ce78. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S1927223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90af92f1965e2a22c519726d1be1d36c65131b6bd3d8bb103724e50f9ea0670b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S1927222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bacd40c80f4a14dd71774f158ccd7489d90d5659fa1b0b601bd1b37c6705c0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US25X2001085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb01ec7ca878c611d77c0c2b51c1e89e1758701a2aa0c08f6a5fd82e0281e34. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2200609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffb3c4a0a3a86c07a10ec2f2050cf2df4beabab3269b40e9120265d8aa69075. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2200754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bda5a47f491b167302e6d9693134a6ef5017cb213f6a2187781d0bb1cd4bb2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2200756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772d55c2bdc42af6d8ec9b0396bf768dad69dbde62a376feaa7d8f320e69dfa7. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2200755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53105aa10d92711c777bd4d9a5d5438c1fbf85f4f4d0664a4b78f44d1b8bfe9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2200760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8d4fbf51bc9fb279c1b94b3c826e1f9e7e8e49cdd325b810a8dab907ff05db. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2205818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8d4fbf51bc9fb279c1b94b3c826e1f9e7e8e49cdd325b810a8dab907ff05db. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2205818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e509994c4d94b4f4fc8f055bcc3b4061aa21d8156c8e74feeb6e40b912adb99. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNRS2342550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2ba77e08627e1d0b88f6ad2797fb358f22f5642d0d1ab67f6760b272c2199a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2401645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1b173f98b9f30e59d82bf155a3168bf976a2c6fb48f325f9278685fdf81d86. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2403841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2ba77e08627e1d0b88f6ad2797fb358f22f5642d0d1ab67f6760b272c2199a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2401645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cc6a97760d92a1b571edaf6c7b124d3c6a2c4ccde162c403649629ea9d6e3b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2403842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52b7763cb3cfe431fd3ec85df2c491a0c557cb27011fb92c5150f6b7af5ee8a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2404660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d5cd82d55c58e220578738156bba88e3a13c7b1bf151fa82ccbd33bbbe7102. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2404813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916aa045151b0e87fd121ca0ba23212a47c90ef027f7381477fcf4ea527a1051. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2027072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbffd7e753835c3617cac108665a4a2728d1015bccef061e1845ceadc7a0e26d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUG11700641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e933b4e262b600bd6438e4a2a0c975f735543aac8704d51479b175a59f9b8c1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJAJ1400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7063551b025b1645f9ee4c21a52fff03cd0264981129695acc4ae50ae5a838de. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2363560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8b2b35ec4306b603ea480f9baec9f701e89509b3cf800b323aa975c6edf7fa. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11516879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddd2795a9a3e2b61cf1108d01e07354c32c03a0d4ece105632802dd7f307733. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBARL1600409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8457a3f4b788aee0d95751b95c882d09757b4b77c519e0a6ad87bf300de9d1. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZC5T2100025.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aedd4dd2ef1b8a471dfee65d1fbeba4e0447a4c6fee61edb2adfdda4c4f2cb1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2016251.