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 0x9d7a9fc052b904fd964191a9d64ad2ef4e9966e164b54f43b1ac70ae326c7f9e. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/774f44b1-e146-4d5b-874c-e029dac8915b.json and https://artists.proofprofile.net/proofs/artist/774f44b1-e146-4d5b-874c-e029dac8915b.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 0x260113c94570b1da0d8b63355a6091f1475f33b6e1ee388ea0aad8dec61fd4a8. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:05:28Z), 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/GXBAV2280105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03192c0c7ace8b20908d52abe157f75c970e09b861c551f502869117bb6da257. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:47:28Z), 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/GXD7V2422236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6563b3ab16c6a86c161816270902d2951315f53fee741030b3b4f5e1539de7. 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/GXD7V2434995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb12723c13963ee1cd33c4a3324a5eb5c08087f99514a30fabdfa5692d02ef8f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:11:15Z), 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/AEA3A2340962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82955f52d81d6e159259c9f05f469711bfbb5967a99d6349e2c0216273c51e52. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:11:00Z), 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/AEA3A2336880.