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 0xa0555f0d25c57b89ec789a54acd6f775867b1411d2efe57a8b17de75a53a76f0. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ba5aa9c-5768-4df3-a596-c17b08cfe139.json and https://artists.proofprofile.net/proofs/artist/9ba5aa9c-5768-4df3-a596-c17b08cfe139.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 0xf1f3f9e41e1069670e90f32cfcf0dc65a16959d8996549c6e04473657e6ec53c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBFPN0918403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b10f83f4d811ecbe9e4a10194311edd77c913f813cf1d80bc9816e0910ba57. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBFPN0712405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151e15cf77bb6ce4ad1f26af8c3619a1831b79657fab2ce15cc9ae3dc78e74a7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBFPN0919201.
The Pursuit of Evidence: Crime & Investigation Themes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cb215ecde62cba26d8939d964f78dc4a55fb974e8595c893ccea69e3f73841. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBFPN1124503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283070c3413228bc047b3ce346d9d7719384abc339d6f7382f6dc3399a3b1aef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSM11903692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2995b55dfece5343cd72eafb4d3f48f8f89749681623f3e9831cced968faaf1e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USSM11903697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f891c3afa8274680f0d96c7464e35ee6657e0a6fc77008f8477b1be21e43999. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/USSM11903702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c7cdfe315b09b3935a99d03c4a4eaabfded3525b249080265a0ac787c60395. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM11903703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67d9f26cfc98524e89c0aaa27923b6f3330fedcde55b691feb830d2972cc354. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBE3A1711701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757d33f2e93f46bb7021474a044f69abb0aa2b5c0bfb13906b29a13f39617a44. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBE3A1407402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c79f2ceccf7ded92e5f2ca7e977a3977e4b5987cca7fa6e5cf386205c641d36. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBE3A1407411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b964a4ca4e296f00d4be7f23bef8b8cd6a01dcb2131c385e093f21eafaf24f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBE3A1305903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17d08365afd79270c7c220cd3a851c715a9a255b9fad4b893b0c70713dc36d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBE3A1102905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811ba726b94375f55cf29dbf244d26824b24b235169d1f839141302e036808b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKHHL1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ea8a800865f0be1c514ff9ce636d9c9d525fc1e5ba7b0fef859e596ace7f62. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBFPN1847801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e757fd3e407019c9077751f5b26bb41aa18090776ea4b8c283cc152804dd150. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBFPN1847807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b66ff96a5be69a397b6142e5ef5880e105631d1b72396e3290a34402305e58. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBFPN1847814.