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 0x3405e30eab5774f32a2ef6e867e9b21b57b561d25fdffecc49dc0d52f469b896. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1902bf6-3968-42b0-beef-0c20c381ab83.json and https://artists.proofprofile.net/proofs/artist/d1902bf6-3968-42b0-beef-0c20c381ab83.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 0x370bdc1c5b76f6ce0d2a72b388e3fc0fb8153b19a22591da5e3f80fc7f014f83. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6J2343034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5697734607c6c619beb699fa58ea9cb64c73484867e2f9c340d303c49d1261f3. 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/QZTAS2333143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a98e8a21ddaa6bf763657185f0d92bd797f9cf8c3e24a0aabaae1a1d3ff700. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:30Z), 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/QZTB72376597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee74a63282e83d66500759e3c5205f8ecad9dd56566626f55031e02484287a4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:42Z), 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/QZTBE2325272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e0c76b7c108ee7434b2f3beadea8e3e9bd5ae5f63788572e34ffce900a57ef. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:04Z), 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/TCAHR2316272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecbcc89dd042b67303f90b901898e7102f8418e9200e224a0985fa4f7a38c0a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ22469204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed78148e4fc50c6507f02a2562eaaa75ff9f56e85848cc79f6304f83134d123b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZMER2476314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5426ab3c7e07436c3f5dcd4ee6e00b71a7a31dfa437ea34e3f53f611738c5404. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTB32420765.