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 0xdcc7911c54e3af39c431c8cfd1c20ad0965b66d0349363d5f15cda3c182a9323. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/683fa055-85ff-4274-a7ca-b875a358fd98.json and https://artists.proofprofile.net/proofs/artist/683fa055-85ff-4274-a7ca-b875a358fd98.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 0xeb18d9bd2471768117f7a15878fc421650d7eed98fd4b6bc61ec6f228433122a. 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/AEA142214460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4caf281eb187473333d0098b069ef27d0e022945a58addaa2a3878f3f60b9a7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES52205884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b81a6e56a96fad65d8296402e12941365d58e293bf736e0e71ad572a86b13c6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZES52210457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddf7cf4d579f7efb708b4ef154ffd619a22e2c5d5ab3340cac052f62cc258f6. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZFYZ2338106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777559de756e6bbf147599255494ec004d73176d031ac8345bad28ff3088c4f1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:16:56Z), 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/QZNWX2434552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388b4242ad52b4b79417f300ea6ac5ca6557aafa08b083c18e038d663b7e3b9. 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/AEA142500987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90421e93c05fb5bc8a2a6e319619bfe49138030521d0d583701ba6ee6c103879. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA142501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446e6a52e11795c69ad3a6846e60eb56847a1bf335d9e1c5d62b40700d40d6c2. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/AEA142501092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297c67f936e5f7ea0cbe1bad7e40814485d897605a3b48bad926728d6125f943. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:31:08Z), 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/AEA142504153.