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 0x3a20f50736bd0739c35439809e3fbe7dbbdb7daad8b1b538342ad67276dd1684. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8fe7106-08a1-4e3d-89bf-ec8b3eb99928.json and https://artists.proofprofile.net/proofs/artist/b8fe7106-08a1-4e3d-89bf-ec8b3eb99928.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 0xf2b6681b2667db72bb14fd20e7af549c24d686ee3fe29dfe23ee0a6650f8f230. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFE2571391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc542217195e821fda597258529e2f4693c45aea09eef52e54ea0f8f3013c598. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7Q2542166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd126a7d23c958c50785870246e06b9a00c9e27b77d5d01f16682615e343b6f2d. 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/QZZ7T2526326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13f755b0dd031c69a425accba8dde0ecbf225397c2296c8efa6d333e9a8f675. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:11:45Z), 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/QT3EY2585223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4abdf63bde0a9967bace90dbb2185fbc858fe0b85c7b0b691fcc7f446fcd1d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QT3EY2585224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eff685f415e33f5d7a2b1ea683cc20662edade31ad5408592a83ca61d28c4f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QT3F22504502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf857d6900c3a8de4009788d5da4cb6c769942c6b3abfd5dfe98946adb4647cd5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:48Z), 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/QT3F52590379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a9197a548efe36b6343466bce4ed5bdeda520ea392fd40a3aef66d523d402d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFQ2473308.