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 0xdbd10cc067fcf77f6e3057c4d33123616ecd5e8186b05308a6c5ff27f14b8e64. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/799578f1-0aff-4c2a-8e91-5a6d44b8564c.json and https://artists.proofprofile.net/proofs/artist/799578f1-0aff-4c2a-8e91-5a6d44b8564c.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 0xd674329c7f73eed2b896643fb599e10f59c9dfb7f2f179bdebeab37ddab48c89. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAA011500643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53656379382628110c8d62b50fd57ba7d8f6c1be572fba13cbd9d2e7b739ae4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZAA011500648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a938fa22a56ccc8ae39a4e1aaa4a323f2651eb395ddaf15093c92153e0e1df4. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/ZAA011500640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753f492e37c95292ef68e77dcca6646a34fb1494677c7a56c431046d26a5c864. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:24:07Z), 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/ZAA011500645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82d8d14789b40c90ae950df5b9723069099394ddec95fe272fdb2440d8da04e. 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/ZAA011500652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c45a3b9768678c6bfb3c0a6af62e21d1c87f038d6e7442de2503bba0cb00afc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ZAA011500637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd83fe2a0a1d395474539a8ec3faea577f43c86101cacf87f1a8742a9b1bafc1. 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/ZAA011500642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48e69fe616aabc4422d6851031c734eabd74b033e4eeecbd888cb6fbc385f93. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:00:50Z), 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/ZAA011500636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c27be5140d76888b344ba6bc475dba0390567b76ae0693adf7b2b71dccabf7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ZAA011500650.