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 0x5802f7b215a61228846484970c42d84c11c81b4d13ebd4797330a7ae6af8ed66. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abf71c65-7cc1-4a10-8a51-37136f467148.json and https://artists.proofprofile.net/proofs/artist/abf71c65-7cc1-4a10-8a51-37136f467148.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 0xaf813b2f2cf4aa5c09ff00b51bca4f7746270f2a4576fb3d725543225acd9c70. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR59R1915062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2067e2f392bf650eec6c01bb08fc00ca5e9c71d96ed8009dfee735ca98646d3b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:25Z), 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/FR10S2075046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66968c8386237a135553df8d7e6930775137f06e7acc923672146f908d40750e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR96X2091499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b1761552d9b28bc075398ddf45f919671bbdf67cd40dbfe66a22998862343a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/FR26V2058478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e79e096ef9b01ce75a85bcf64f53ad52616f27bb761051af70a46947f44df38. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR96X2108616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb49509cd8b76fb12ad88ec48d0de2af02552d7eb9b126320cd20837cf359ce. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FR96X2199535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebe6255838806080b67070f387bededabda1f08b8a226a17b209b8409d8345c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/FRX202125198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8005151e8942debca4a0efdb51e1f2a15157c35c6069cb601572dff15f5b6a6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:42:31Z), 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/FRX202125199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1e0d964c9e982d4fd74ea2159e499b529a4b061a27306943cafcd53092691d. 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/FRX202125200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4ce0372257b57f89ba938cb3c49547bb9f670d546f8e074705687ecd76e9fb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX202125203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4461d9600eb2ca3d230782197074c01597e48e8851edcf1d560525095b5abec8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX202125204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e17a2fe57f0e33ddfaef499005c40d15b79022230e6d9196385690022f3091f. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FRX202125205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5664d72b6dc4f87ef704cedfda2d5261439ab8daf7cc53ee15286b1e2d7c92. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR9W12250367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150873ee2538297cc024149c635d41fa78b7d057111c07e975ff2d9c39764ad0. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/FR9W12250364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b819e663a5788c4486a5d6056cbe3d3b2329d503c0029a8400b45f0449af44c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR9W12250366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48d36f41e585d1976c96a65c5594750eeabd3ce21740e96e8e46e0e6c83f4b1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR9W12250365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5664d72b6dc4f87ef704cedfda2d5261439ab8daf7cc53ee15286b1e2d7c92. 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/FR9W12250367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bca253830f4a6e78de09450c5cdfbc3ff0731a83290d3cd0b37953b824f9b9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR9W12250369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd2120a044bb20eb530ceab583d9708bf757628b8c8ba0393dbba506e878a6e. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/FR9W12250370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7e37786c9c4eb55274a2ff858469674b6336a866c1aa601fbfe7b468cf959a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12349544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdde05d655d1c56268afd63f21f0a86f62b68163e250266a98bd91abbba1015. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12349543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1464a08b488ffedc10c0b32f73c5ec2f4ea45add213bea62ca3dbc5091b01194. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:52:25Z), 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/FR9W12349539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf304de60e24188b09c36828aaf054b4a266a0bdd5cd89a1c1892f642df2a0a50. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/FR9W12348588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640d653701b4af0d87a724ee7503d91d4598550d83d5ff9b58fa46532b808be0. 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/FR9W12349542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ba5d47833e595aee5e6cb683565795cdaf99b2ff945c43f8c4c121bd6d035e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:02:20Z), 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/FR9W12349540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d17439c918937b543a47266ab65f5f6a8589c930aa2b879d36d07b0cb5414c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:42:28Z), 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/FR9W12250368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bca253830f4a6e78de09450c5cdfbc3ff0731a83290d3cd0b37953b824f9b9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR9W12250369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9532342235132535bedc21815f38946f7e82e68f6af61fefbba6c05a905dc5c. 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/FR9W12205667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9532342235132535bedc21815f38946f7e82e68f6af61fefbba6c05a905dc5c. 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/FR9W12205667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9532342235132535bedc21815f38946f7e82e68f6af61fefbba6c05a905dc5c. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/FR9W12205667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30c6b2e7ca4d02da8673c8c3c38c7c675ffb67729cdeccc3d63ee58383d07fb. 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/FRX762125241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ffd3c532fa7c3e2248c0c4029995283387b20db98462048e1c73d2e81a1824. 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/FR9W11911605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf767fc9e8d4a86e29a77aad681e924d5c36d19cac6369c6621ccfbafb630b652. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202205393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded42473c561df78b4756f129b2863a58fee7c07ebbe824cae2fffc35f11d505. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRX202205395.
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