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 0x9d506a351a36152e28dafb237ef4cd4a4d5f5a666ccc85e0688a759deecac7d1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c124c2dc-9f16-4c5e-b411-7dd1447cb82d.json and https://artists.proofprofile.net/proofs/artist/c124c2dc-9f16-4c5e-b411-7dd1447cb82d.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 0x5f80de5981b040bff5d0fdcc2e1deb72b09707fd2a111f62097186227171d045. 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/DEND31111010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f29f84869be31a5e00815e45ef9c1ae5fd851e721d9e2a69e40cc6ec9297c4. 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/DEND31111013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1945682782a2649aca30c009e8a90d18acc21b9e04fc7b34e8176806128b83d6. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:43:15Z), 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/DEND31111018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ee20ae7d75018ed590fe248fe41e1439f0791ae9e693dee47687d8a6c7aa01. 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/DEND31111021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e733621700d288c7507c5321ec0978320521db4f31391c70580ed174bbd1da. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:54:08Z), 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/DEND31111027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d475e6c61b1e3b17df5af213625bcd5dc428bd1594177bf69694bf3c4540e2a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEND32410002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd42b6a5725fe12662d9eae66032115a28c8542861f2250f2c4b7eced6e5093f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEND32410003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cedbce7c38426b2f6c443c00824ef3e1e47f8c75dc4cd1199a885fe68eaeea. 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/DEND32510001.