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 0x4fd208db744576acca8df141c571cf9cc530bdd3427135abb6ee0c8cf4ba3c77. 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/f9026adc-3c77-46b2-94be-44e564d34901.json and https://artists.proofprofile.net/proofs/artist/f9026adc-3c77-46b2-94be-44e564d34901.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 0x90e48da989d9f20a0abac0057f719d8f9f38a36057201dfce7cefe99ff949bc6. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:24:54Z), 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/TCAEC1902183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfc43bb698ee699edca751a7b7258654a56d92be685c9f46cf7d6269f17ee44. 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/QZNMU2006557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b68761df2e0ba41ce93c1a3d1410d06de051da9a62b7e5dce4840981a1064f. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:58:09Z), 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/QZNMU2006558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fa2a793b2102a34a1853fc49fa999c714d80398933fcfd10a61ea7cd723aa8. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:48:00Z), 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/QZNMU2006560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa2e56113cddda3acf03af3abd351fad3e0587a8edf46f0def0d61056b46b4f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNMU2006561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8fc0521092cd40f636c6f58cab00ce9cb8ca0f7fdf4e6d93f3eb29d3d653f6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNMU2006565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef8dfae3cb1e7c871d82d7ebf5743fb187388ded52339464e20acbcd28e8658. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNMU2006566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fb63f622ef7db2b3e58f306c71591c49c72e1350568d8c34aa3cce185a8efe. 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/QZNMU2006569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7341fde4c93574c660de7228b1cdec344262af11696c9dd8db3b54253f0e2e0d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNMU2006572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865c0c5084dfe537dc6d38e1a3d373350703da9ff4861a9ca53cf65268a103cf. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNMU2006577.