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 0xc300066977c0a830f2067f472054f8333c6c2f56b91cb3d6b5cd24de1905f9cc. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/551873d9-27cb-4c53-954a-47a8f1b080fd.json and https://artists.proofprofile.net/proofs/artist/551873d9-27cb-4c53-954a-47a8f1b080fd.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 0x75e736954b709e8f7bb08cb31f0835b275eeba073630d290858ea726e3cc7812. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPT2222163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e736954b709e8f7bb08cb31f0835b275eeba073630d290858ea726e3cc7812. 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/TCJPT2222163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf26403f617e5ec5e9b5c06c52206e5428ce7a795f7d45ee925dc235c999a992. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:24:37Z), 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/TCJPU2355511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b028295dfc567163fca4e5d476918fd79bcadb6c3e9e55026591b5c4ab18ff. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCJPB2452275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758b2223ac77d589270b771ae3f8fcb32e3a9fbbfc6c4257baf1d34025fdeaea. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:02:47Z), 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/TCJPB2452277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763e0ac610ede7635460be8b0710b78018e2bc53690fb5271e09082797de368c. 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/TCJPD2401180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b028295dfc567163fca4e5d476918fd79bcadb6c3e9e55026591b5c4ab18ff. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPB2452275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b028295dfc567163fca4e5d476918fd79bcadb6c3e9e55026591b5c4ab18ff. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:13Z), 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/TCJPB2452275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c55aa66f7bf71ba86252b315ea35ca5cf3421309d51400ac03431da0f4dd43. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:28Z), 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/TCJPD2588949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123f1ba0911e9377f366d5afb77711e5bf28d04bb8588095d4e7506c2295e115. 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/TCJPI2546148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123f1ba0911e9377f366d5afb77711e5bf28d04bb8588095d4e7506c2295e115. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPI2546148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387ec6afd11b8ea40ddde425f4e60a98d003b8b2e916e69297aae39a23171880. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPH2509250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec16882325d5c7d921f46d47eb2d61048667887f7e9f15ada9feb3b34ca198e3. 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/TCJPH2577548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec16882325d5c7d921f46d47eb2d61048667887f7e9f15ada9feb3b34ca198e3. 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/TCJPH2577548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d72ede763be35cb632f5757226a72a136930ffd394123694419bc0f188dd51. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPY392402442.