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 0x8a1adfc734c2f5501513b09ac0ce5c50e68f9bd121fc6a1795d56bb27f1cde20. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc09a808-9415-44be-8b93-24eb46bb395b.json and https://artists.proofprofile.net/proofs/artist/fc09a808-9415-44be-8b93-24eb46bb395b.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 0x9be5a490f0fa0e93b3185a74ce9b7353ca745b1add69ab7240363ab411e338a9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMZ92054370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2f369d25063d8e69a93329aa32f30d27e8183c4d3d6f32bed0ed05d89a9f4b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:57:41Z), 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/QZMZ92012348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5df96fa9cfa6972fccf3e28163c2be6eadbe3a268b0359d9738aa7e43aa93b9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMZ92012153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71283d94092eaa4df6c5f466515271857f984af3e3defb94b9bf3906e547ae62. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZMZ92012239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf761a9333558eb6946b8b9647533f2a4fa8fdefa2b4d009381802266b8f9c65. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92083522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0ba964bf8be2d8bbf9706c7c84232fc1618a19a72519f54bd32d9ed4baa227. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMZ92083464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86417eb84c10483aa9574632ab23b0f826930082549fa70d1341686665e9bf1a. 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/QZNJV2004001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511a280cd038dbdb0419160622bcbbb99ed41ef5f58b648eaa74712dadb0166d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNJV2044695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e5aa9a53c183583378354b34889ba63189a11e8ff025faedd6130a8dadf60. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAHR2356327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30d3b287399433797007eeca131da8125c1090109424be66566c75a2b53270a. 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/TCAHZ2482421.