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 0xf781c9b8147d7b2966bf36caaff7fb69e3d87b90384ba8fa1f1ecf2bfb9d4821. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2a2f9b1-9ed1-4e78-9a40-c0ca708fe6ed.json and https://artists.proofprofile.net/proofs/artist/d2a2f9b1-9ed1-4e78-9a40-c0ca708fe6ed.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 0x5666b719d3f31561c3c8e45b0bd3350ae988cfdb191c0ffac32d94a5ff100ff6. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZGWX2248285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdfa2ef70ac857a475670802e70231f2f0288ac32c2eeb173c2b2706af08b48. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:45:32Z), 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/QZGWX2248286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4448452e9ec8aa303dc88f7b5632f1744387e3ee0a7888499bd426cc18b7620. 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/QZGWX2248287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16bdad6c3023bcc21de9280c15d25ff421c76849ab2ad5e83eb3d19b0a251f8. 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/QZGWX2248288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25626b07a4dc14445a6745f16f39f3555267311ceb911eed8954efcc4eb1d9a. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:08Z), 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/QZGWX2248289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcde6b2f61c2afb50fc41e29881dd0ddebc5b950359bc4f2a708fe6c0189084. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:58:46Z), 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/QZGWX2248291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b3c36d082020c8f3f797cd976213ccfd64679a1700277c2917dc75015cb85b. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZGWX2248301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3322c4bff107bfaafc6d3f034278a7723c744d64af8592980c80de1e80903e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZGWX2248304.