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 0xb29bf1a730321647699b843d1e7c41066b899b090d1bf2d053078fec6a1aeb2c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/326e097a-f605-41e3-bc03-bae9481ba60f.json and https://artists.proofprofile.net/proofs/artist/326e097a-f605-41e3-bc03-bae9481ba60f.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 0x920c9521ac5f465ffdf06c1cd8c553d300d8f6adcdfdebf603d74db54a43385c. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/TCAFR2178870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fefd0c468e6198710333ab549d5f53985a8cc746aa3790fb1d7d45b3a1758f. 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/TCAFR2178875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22407b3268b59233bdd6cfeacecb8bc84d4a8287008432d538c4d2a3dd314db. 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/TCAFR2178876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62b0e62f42535916d766580812a80afacacbcd80032d18b9fbbd41feaf63542. 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/TCAFR2178883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b969c6ee86d359eca97a8677c304ebefd3f3814cbd6d127ec60a93c6a60def4. 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/TCAFR2178884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3e716acc7647aebf1c027a6db6476406d03d241592858b6415d729a5fc24e3. 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/TCAFR2178885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c5549217708293f9281c3e459b864a575cc099c5f69e0b03ddff8a52ec6b8e. 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/TCAFR2178886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f032735fa4f0515787be56a0ee9c702bacf8d897eb60d1bd7847daf1cf19bf. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAFW2151533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f607cb277996e5e167e04061ea5a9f9d11de0253af0cf326251b0408e0db529. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFYZ2271380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bcdfcc08b8a3567414537afebbd068ab7602380d057d582633d1087930b28b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZFZ32288561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7e997063b5ef1518febb60ed6d3d0bd3735c32645c6ab71e76c93ee6cf978a. 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/QZFZ32288562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb5da15b9709523b25b6320b3ed15d0c4b8771677c4eaf6932b2a7ca833d390. 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/TCAGA2296987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eed4ec14aaf5e52cc46fbf4e74780aaad8987ba65053114a832df5998da38f. 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/TCAGD2298889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40076dfee01ed67d6aa06b1116ade42d31da15a3a16011319e76ac9e0cb8624. 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/TCAGE2232283.
Sunshine on Your Face (Instrumental Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b22c146953a263440a5c7d23355aa5e3db2962b8804a0dd96aa03a15185656. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAGF2264094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328494b259623302c0582698cadf63204486b9d2e337f73acc589b23268763d3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAGF2264099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b315892552dcc16e7edb4f40ea72d4fa5d23a53e6adb7ea5c810b1564a140aa. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAGF2264100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cac27d63b6336a7ed620de1d12d088c3bdb1bd31e6524b96dbb5b76a84fe23. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/TCAGJ2291310.
Ocean Beneath the Sun (Instrumental Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc1aab61d5d4299c2bb045b8a1b3882a05b3f2fded37fcf8df56bff56c27ae1. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCAGJ2291336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739ce574a9a5c98ac31e1c2dcf9af475ed95f2c1da134532dad98fa6b9ae7cfc. 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/TCAGP2267925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4afb417ca8a67ba0ddb080bfd39e19202190877651312dfc319fcc6f48cf903. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGP2267927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4cb1e80155bc1307890f96f7d86ea0c80a95025d7229aa624d3c5012c5e896. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGP2267932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22275053bbe2d5d15769ad2be8dd9ba1cd27628936fba1d391f630361c8339d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGP2267940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6c09908d7060de9eeb9e95869c5bdd868c015d3f3f699448ca094e275b6bad. 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/TCAGP2267944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20fec5abb358b1ee56e647e234cccf690aeed2fdb688c138f451da2ce14f773. 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/TCAHA2367482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6814103a3e1e464f9510ea870f5cc3dceb5493a9f13b781a706d842cf8e41d9. 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/QZNJZ2549561.