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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb890e9dd4cd0490407093e4795575fa62ad8f2b612d946899e6399e5b51aa699. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8306b8e-4687-419c-b8be-6fe79d7548ea.json and https://artists.proofprofile.net/proofs/artist/c8306b8e-4687-419c-b8be-6fe79d7548ea.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771e6e23731dd96d215a9dceb0ee8a45f4afa524e5d0f9f4dcf16df909384dce. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZMHM2299719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5df78dcec145af9ad527abf253de887e8e29e714ae9aaac34e551755e462071. 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/QZMHN2203281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ceefa40732d9ab3da14706612379c79940ece758ae2b5f1e7ff0a748567b1c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZS642289140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25b1abf827e9ea9b46dc8301ff50e6d91271505113819e61b64eb327a1bff9b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMHL2300576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575587fc6252ba7c7974acfa9337b498e1435c2949ad66517803a75764aaba8f. 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/GBLFP2466051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef33b12cc7264452d35cfbf2246495a2271e4ace0f4437cc34e38af489690c2. 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/GBLFP2435802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7120067020112a50590702c49a52ae7a423427315640d9a94903a307a9c899. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBLFP2435810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a003725c16bde54d8d1e360d90b28d7ec2219573f7ec57e5193ca724b1ab19. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/GBLFP2435809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f68fa006f82634851eaa2852f40a6b7dc161b95df7c1c97cd6e0423589d4c02. 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/GBMA22326133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77f3b9987d4825316e3efbb0ce387e83cae8f923bfa48c0e952b858f562db10. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBMA22326130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e8c641d7db03dc3ee1536feea66d9bae5100066c36f687aeefc1274a471e15. 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/GBMA22326134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbee26b2cdadabeaef4844f923f21afe1baa3cfcea47e49311d473f8f19ddb81. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBMA22326132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154a0f955a5441950f3dd93a15dba6a5a7ce742667c7a6a36dc6f9edf97d0488. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/GBMA22326131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1013d0faa739e8a8ac7d278026b238c2521f949af80d0c02004cd462e9db3cf8. 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/GBMA22326129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d85ca709bfd5e2d90ebea63f8a92782d1cf6c84e8ab401546b02863ed29efe9. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GBMA22326128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e4d877eac97bf76e520bb4aca9299b0183140b4ee1289b7c0b31b7a8845bc3. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/QZS632386181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0d208255f7b71a55ec67aef5090d54741c48deee7ba866326a26e2716b234a. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZMHK2266439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff04cbb7ca3dfccc53a2608bcfa2858ed4ca8103e0948fded2114c84eddfb0c. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/GBLFP2454206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ea871cebf3cdd54099f3b27b7c39b74600293cb671d195e060456f6c415662. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBLFP2435919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54e20c424bcd1cef8628b73c31ab26235a0d61701aaee96a71362bf9bd38f9d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBLFP2435670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86db0f5cd14f24660729726c134e8e2557555bf3b3a9663249179b6252499091. 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/GBLFP2477022.