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 0xfcf64de400110db19487b5cc5a687d19162187b449d9dc0d43a46f57b2c7a297. 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/6f71db8e-6a47-423d-a713-d486f7fcfa10.json and https://artists.proofprofile.net/proofs/artist/6f71db8e-6a47-423d-a713-d486f7fcfa10.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 0x3f4160b7b9375369bb5de34709b1b89d7f45a76b1ef4bed8b58ee7ad123e6fcb. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ES5059501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3c78cb2503c683b7cc0404f23ea6bda1a88026a0e81a5972165f4f3aaf4f89. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:51:03Z), 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/ES5059601000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ff8ac285e94a089dd90b114cd500f52b97ccaf9fed43e08ff7689e0142e41b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES5059701036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ba98f87772a7e4162c5f4c98a4225fc0880dab3e38c5f0f00dffdb32eb6caa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:37Z), 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/ES5059901046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2112de4f3a925363f5826cd57d4063f230ecd4f9e987128f8fc6af5fcc9995c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ES5059501002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87359e775858bdfe2a226828bafadd68df68081d6f029b3b0a0452aa12f3a165. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES5059601007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45d8ac11fd51051e0e3576a51afcffa6a7496aabfff2e32a686c6f4966c8c42. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:27Z), 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/ES09C1000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf175d63db92e439673ae1a9f0d7ed675d0bd3641eab9581eb32484402ee5cb2. 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/ES6671602972.