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 0x4bc6d3daf398109b2a02d24ac1c995e88b23b45a99da42b3923c4355e2e7d498. 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/f60ac4a7-afd8-4eac-9f0d-a652f3155d73.json and https://artists.proofprofile.net/proofs/artist/f60ac4a7-afd8-4eac-9f0d-a652f3155d73.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 0xa45bbd0d733ff6ec486712acd3e3e007abcd2e892a8bc6cfda4293221257b659. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:46Z), 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/FIHC81700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26342297d178c79fb1bbb218a782ba2474cf22a63a7c8ff66328bfb1bccc42e. 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/FIHC81800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1f23d5e9d1b6ba096dcc87725220b784899276d89b6309a603731902ec5b71. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:51:16Z), 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/FIHC81800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f80b494d7120f5066266cf692a82e7316a115b91cc31045a9789fc5beae5855. 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/FIHC81900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f80b494d7120f5066266cf692a82e7316a115b91cc31045a9789fc5beae5855. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:45:28Z), 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/FIHC81900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1095ba5f5848f91be7a3c040954410a29074a669adfa9f039a4a3a41c7718f83. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/FIHC81900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd23c894ecc0d43d6c5f628a7e6f7fdf6789f12b07e7caca3fb292a4a1229c63. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FIHC81900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5dd4321c16e2bd57492dca1e9fded46c897cb1a67e917c20a81087fabe95f8. 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/FIHC81900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b36d7ccb38390ee6bcc3d49540fbdc3c52712b3658bacee4a399b25183d3a2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:24:23Z), 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/FIHC81900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd1e85937ca2a640bc008cc464dd8aa9b748bd04ef9666b3ebe3e920edc61cc. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:19:59Z), 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/FIHC81900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bebc25a1d263b59bdc8a1662dfc10ac90754dc1752206c8615dfd5acd81fb5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:59Z), 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/FIHC82000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d41c4c55052059d0ae27b2d35ce6cbd4dfa635d789193248aada7f062e4016. 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/FIHC82100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6610d73bc3b05217d3d4be2193d84c3a113b2f5536174c8d1d26ac9366aa7356. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/FIHC82100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2d28193065097ef799f723a34cd8663d08f8a75362f76e348faf71b14ed889. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FIHC82200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb17b18a1731bcb5776d55062dd2ae71265c32e8184e0a735876f5945a347f34. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FIFEK2400001.