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 0x09707bebdec35c47d2c4fc03891d8d4441a76e52b0916397c592ec254ee49863. 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/c3de156f-36f1-4d13-bd4b-4e34d1b3c6c6.json and https://artists.proofprofile.net/proofs/artist/c3de156f-36f1-4d13-bd4b-4e34d1b3c6c6.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 0x3650fed26023f9f431c80aee69c5f2ec89a6ebde2886721ab1e21350c9fd3da9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/NLH2L2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eb35b1749706d7d99cd81916e31f00830d80fb047f5210833a3528b362d2a2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:08Z), 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/GBLV62118655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85867d6d940ec92895789999fb50e9c557e4836eb005c0298e8a4448a116d675. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:46:36Z), 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/NLS762200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375f300a849851f4d0e8bedefa251512822b84ba27b3797ab2fbf4b02a384f80. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLH2L2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb89d495f88b19b9d18796c9451c6a87e0cbd1bda1986c6ea45b8f62a1627659. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NLS762300355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9affcfe6f9a83250fbcbb663ae4e2b7fc4d222150251d549e458dcd399a771d8. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTBD2467365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e69842eda60b74f7500e02570d42b073e2b5014b272fdbc7bb49b6a0671a211. 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/QZFZ72563476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c0ad5bebcfe25ca436f2795e2d3737d5760e24855610711fc2e8006b139b7b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NL6K82500010.