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 0x238e886b2f12dc6567316b43ff470d80ff21dcd3d63410fb0d9eed822c4180ab. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d81109ae-909e-4739-95d3-79214063f77d.json and https://artists.proofprofile.net/proofs/artist/d81109ae-909e-4739-95d3-79214063f77d.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 0x411acb43c512074c4f239377501ded2d17fe17b603a2b68f9077d9b217c7133e. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/UKZJ72200267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9d68c79f3deb9f1e27403cf6c4e7861e74af8d0af513c71c53a7a792e3ed70. 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/UKZJ72200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d093658cf1aba295a215cb24ff30951ac142108850137a6ea4a5e20ea75a7a8. 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/UKZJ72200258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d942783b67f1ad6cebbb0d847d4e4873a37285a30dc5fe92643836e0e7da60f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKZJ72200259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca0f259d8ebfaaafa80fd2f48070e3743101c14bf3f51c1067e1eb0997c4592. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKZJ72200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6214127deb7fe4ec74aecf0df7d2896e52ddaee614269a37458942b28e217d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKZJ72200262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3db3009c06d5146e183c78b03fbb846b3b31abbf0ba77ac407116c29164e7c1. 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/UKZJ72200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bb0c4440131293bf82979944924be7584b2f380ed81a43979a1aa23582364f. 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/UKZJ72200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af05ae0396171b1a6bd24cdda9a2719fd611adbeb58546d10b2b8c14171c7f3. 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/UKZJ72200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56928bdaa7484d01495eb7d250a96c5074d3a15635d44c0c70c8afe5b9de6af. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/UKZJ72200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaab3616965b1e08cef6051c3250851b7ea25be6133330e5ef181750685f57b2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKZJ72200268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cdbfc657b80a5893653bd36e98bb941d02444e852a30a54be91f2a97580b19. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:53:54Z), 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/UKZJ72200269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792e79bed1ebedd0a199840ab64b1c992716ae789e2b41a425cb4a2a8735d908. 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/UKZJ72200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f4cb2138b933f619cc7b0ee7f47949aea9677fae62854abc85cc732cab8083. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:26:28Z), 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/UKZJ72200271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a2dd14b2741df9276b54f394a3fc9c94f64f6d9912e2f5b2bce8842ccf75c7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKZJ72200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c66cf37a194adcf55e3d3657e0169eaeacafbca3e03664ff7e2359b1eb5b2d. 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/UKZJ72200273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8647ec6076850decdf8ac27b2bbd7c5110d25536f42c487d48a10c805ad64da3. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/UKZJ72400826.