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 0x7e2746040b90acd4f3a188b222243fdd4b12c605313bf41d4a046e7bcccd0135. 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/e7e41d67-b380-4759-a6e9-0dac11fcbb2a.json and https://artists.proofprofile.net/proofs/artist/e7e41d67-b380-4759-a6e9-0dac11fcbb2a.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 0x784f00d17ad1d987acadbcc397df955bd65c4c16418ff2337f98ba1262b0bff6. 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/QM4TW1828304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c102f9c8b0d3753b2749ed8ba877d16c9b5e88686136047a6d464faa2300be5. 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/QM7281885676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1699cb65961fef1f3c3febe8eecc47c82fa5bbff659e4dcfd7b81a297d364600. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM4TX1916987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d16dc1aa29c6c6fca17a9552a35e120ea80f17d81dae924f28ed5ce198b7f5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6MZ1911786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe4bc04940911dfefeeae0b4342389a448452aef1d937bb278b0b9f7b8aa251. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMBZ91974128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077e9b86291e35868675c30bcc4ee6b2fbe21b50ed0fd51c1faa57f335d6fa7d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QM4TX2079559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb0e581d90c87b5871b3e4e802b3946019e2b5a5768364f1877ef8be38d26f9. 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/QMBZ92087902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35be7c4e9b2fc17020bd70a16a2d61cf3fcfe5b5fa7ea21e58fc16c64a00779e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QMFME2157885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6faf056cd6ae4f488c7c05f2f75c736a2faa1a561c7507b62f75c67659620d. 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/QM4TX2251523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816899019d1b0197c8ffb4165885e5f309b0114e772fb71e9dbcbdde265139f6. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QMBZ92355577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd69f1bc4a86e56bab8534a0f326e25c2683cee8163f57c1632a0e3f2c08e06. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QM7282451987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feeda5c86ade070e4892a6d7213cf89ba3c7f4ab4394ca45f50679c7edd9124. 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/BK4DA2303464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87674e73c487cc309d8dc0c85780326f9d9a3979b1eeae3e69aac0b3ec74701. 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/ES5152000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daf97509bfe0624f2801683be8f06d722ae9c69f6b846399508e9c7622cb111. 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/ES54D2100020.