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 0x091c284209342f563d73e578bd736527e4d33674c9e0d2f01a18a36d3c62f90a. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ac760cc-3141-4206-82b4-e8ed84cb6e8f.json and https://artists.proofprofile.net/proofs/artist/0ac760cc-3141-4206-82b4-e8ed84cb6e8f.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 0xd0b83afda1448056b0ca625b537ecf75e5c3ad60db95cc83a9f65b23663a9fd5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:49:54Z), 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/QZXLZ2402914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91922f8a54496d1299e891d96ea35bce0366531f584d0a6cfab202d607af6e7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZXLZ2402915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675e1e3bc31059632c7c965705755d78f5d0f2b8ddb58e9912ec4593d21d1c04. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZXLZ2402916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9915dc47763f7fa3a24200c48ec3668aacb1f66524d9720d8aefd79254d320e7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZXLZ2402917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32985467795f9338c03c35f41a31c2a7ce5e7090fb54ed5565003c28d82b2857. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZXLZ2402918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d1ae3bbb018bc508f27961f6fbfb1cbd9947ee98463d95b6054bb1f95c7ed4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZXLZ2402919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b781479c36e53aeb5b0979b4027b0e15e2dff002fb2ce09c05f7316440084a. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZXLZ2402920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83d792e4073a76c7193df41f7b0c2d8c889d87f6e65a29f33409a810cb30eee. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZXLZ2402921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b8f352fe88b500999f96954e82dfbffeca58dc277ac0cf072f60aca184b20c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZXLZ2402924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb77f1f2b24e81f95adb9db9cea6dbf9f6a1a783f4bd59f601da162a7cdbb14. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZXLZ2402925.