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 0xf1a3f3ca634d5044a2f6e0f1ad0b2e517b63604655f4979be420522fe3077c06. 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/919208c0-73ab-4fe1-8a49-6173d5f5cf53.json and https://artists.proofprofile.net/proofs/artist/919208c0-73ab-4fe1-8a49-6173d5f5cf53.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 0x08f94e11db58d9598a6b6882ff34153e9fdf2bcfd790ceebc6552c3a5705f944. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:20Z), 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/QZHN62231357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c385f0f06acf5db60a3113c2b700c74eaf8eb9d4b679eeaf195124e992ca954. 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/QZWFQ2340221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a73cd339017343c0249a45a56a3cadf6e3d96762858bda5368075bf11fdb14a. 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/QZFZ32455868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c2cf4b120c23ebb7bf9645a88771b89b875c2af3d1436b893f660f0231cf6. 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/QZES52418630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bdf6fd05c809bab896805f226874b05fad6ffb0bc2a8ac36b72f66ccaabfd8. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:35Z), 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/QZPLR2487737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827cd26db6ff35ee4dab0397ff230b015c7a8529c767ea21032614277af144d7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:37:28Z), 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/QZTAT2447119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039bfe0e966af1e3c7d4cc0c52bc3d1219acc282d3a7861abcd81e79c4a71be. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:25:05Z), 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/QZTB82474646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a333afb7ff1f3d2b76e9e85b13f23a6e17198fed173694a7795b24814969d7. 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/QZPLR2537523.