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 0x41e7bfd857c1ffbf97cc82ad946e10393055d8563144b1a038178eb7757b786a. 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/65862ea7-6a18-4011-a3ed-a0e6bdf35859.json and https://artists.proofprofile.net/proofs/artist/65862ea7-6a18-4011-a3ed-a0e6bdf35859.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 0x5217193c64d95bbd87f25e8e0721e3b54f75b1e61129c349855bdb5e5f3a7a0e. 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/DGA072132059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09dd1bbfd17ad4d25efce345463c4c5f09977318f8ecaef56a760c293b14ed7. 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/FRX872364029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8b7e023d96780871d145c5b96a902f78de9589014a9eb84106555287cdd627. 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/FRX762260885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe23d8f6eeec7cdc011256568abf90ce114b54b467ff3b76da42543d51109b00. 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/QZHZ62279768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc110b59a0840f0e5f871fe033e4d94fbbe77d3ef0d71227e77edee18e85736. 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/FRX452359279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edfa7c14ead7a1542c046f2f7deab1e251950d2b453e8dc2ec20bd19e8bbb0d. 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/DGA092395195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe977b64b6c6822ba2684b826606dfcad9691d0ffaf42df9d1fdcb1ccff28d23e. 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/DGA092380298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec36749c0868f2149d613f9de470d683eb13b27e4441bcf9a178d6f035ac2e9. 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/DGA092309538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc110b59a0840f0e5f871fe033e4d94fbbe77d3ef0d71227e77edee18e85736. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX452359279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c51b1a0893c9cc53a6aac3d861bfdf43d28ebfd325b7b595e0926df9b628a8e. 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/DGA092395196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeee97ee1f35885fded079bf6adf01d9d34da263acd27e0fd284e162b742696. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA092395197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12d05cb30ad4026127b74678381259b3e44f952b473ec26e5fda0c686dd8aca. 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/DGA072344858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832e228c2e4351ab11e259c62ac507349f82567a2006a7de13339d4aea259d29. 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/FRX762396092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb802fc38071db504508c542e8b96e00776bb28a932de2584b3f79425586088ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA092395198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb121a2e101a206c3e77f555a0d4f48c3bb4b48729cfaf1960a2a129d12ed8ebd. 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/DGA062337571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2af3e1b487c273fa9c857bb6418b0785c8b7fda3ced06a2c9ec6d8fff2e9f7d. 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/FRX282349770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8306ee0442478e38606d491ac2931ad8dd427fa6456646bf30c3099428c322. 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/GBWUL2229435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88231ed1062fad812a969144b0da0b655f5f63bce40bc9e7da44b36416c167f4. 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/DGA052009825.