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 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 0xec2b3dac522b3819099c627f7d2404c406812bcb8041c0c764aeafc8a815125f. 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/485c7355-28e5-4419-8da8-1a5ad3a24def.json and https://artists.proofprofile.net/proofs/artist/485c7355-28e5-4419-8da8-1a5ad3a24def.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 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 0xa586a444fafc8a58334580a1e045cc12b4b5c9f4a19eee7f8059c69a27c9308b. 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/USHM81452519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fad31655d010c76c495d7887ecc9ace3ff647eb1b07cd889aa2f52d1607d8e. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USHM81452520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2162ddfd9925e757af7a97ef6e4dca5ecf6d341bac37529d153daeed557da58d. 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/USHM81452521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6641d2fe17cec714ad9373f820eaa026e60a342f464020cd1707b1e76bce8545. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USHM81452522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d25b542fccccd28fd557ada6e77c179f04fd36c05ee9295c41aa47005149ae7. 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/USHM81452523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828c726607d58dfc1039d8b975cb5d408ff89e68ce19c73da591255f68b6c6a6. 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/USHM81452524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795cd276415cbf53fe66deb8b431e1d48b511f988d000877a78eb02c7cb86e01. 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/USHM81452525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202a6a13172a7731ae1473d06eaea05350d8110597d2b2e7d85f6bab9c4cab6f. 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/USHM81452526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6f2819c13bb39590b6d861ded897a93d03f793748c7ea9d83e45b82fa558e4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM81452527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574e5b6370b758b4ad224ac65d83932cc15ccd1a8610423d6975a5f66eeec3d3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR59R1770938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6ebcd1726b76eb51b8e7c0aa48e56685ec4dff0d476c9b46f231f79c3aa81f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR59R1770939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23df2482176c20c702c22efd4868cdd5c1aa043018aeeb899456cbc541edf99. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FR59R1770943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883090875502522a253456406f97c8dcdfede61ad203304553a0a91cd13e8d35. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR59R1770947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799024308d4463ff0405b42c7d34b1bfe61bfe9bc408c357cf8f192e922b3d25. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR59R1914738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ca2d8f0458622fbfd8d45117ab0d1c926a48923e9f7099702f35bca1b9d618. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/FR96X2151895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8279d4560426e33bf05c67fbbc94662a8650396a51f2f4ca2ef233dda1cd38d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR96X2185180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2e05b636d0121781c4c0ae55a6040119e46221689954bbdc25f3fa76a611cf. 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/FR96X2185181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4792fa82fd6195be59730093e2d83c4e33f581034acac5dbbb607dbf086b20d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR96X2185182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8642c7471d3490d16bbb61c16fda9be58e74c9959da442292b43a8fbd60573. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FR96X2185185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b4a157b24aeb755af74ab492ec65c59c24180009f363e00775853b02b28276. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR96X2185187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc5d3973ec59001240488771482f0cf2847c90f3b997e6cd533c0fea0fecd96. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR96X2185188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5f034af5aec22fddf60e644a31c7e7e89889cfec08d72c569257ef26787a5a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA062507141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe258738f0f235628ccedb93280160b6472fa1b005760d42c8224c6868c2cab67. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAFH2032891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b3e91294b3b3f611726a5d7fee4aba512b04323ac87c5b0d1dd003bbb7f53. 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/USUG12400224.