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 0x4801f11cc5018d506688dcfcc6020f3e6231d41dbd0210d7788d9c0aa6505a95. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bfc036c-552a-4b67-b94c-4d344e70f66f.json and https://artists.proofprofile.net/proofs/artist/9bfc036c-552a-4b67-b94c-4d344e70f66f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rap Hop (Saker som barnbarnen inte borde veta)
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 0xbc93420fc333e83c4686404ae630992b0d9d216c0f782319c30ff9b6721e863c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/SEYOK1011669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7e58ffc2c0aae6d3c32bde43bbe20cab17637487a44b4794c5ecfefbe85551. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/SEYOK1011670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcbcbf0f03447e293c68a27c2521f2dbdc3b086d82b96619f9fdd49a33650e9. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/SEYOK1534630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158ef4acd2ef80dd6347ff39fab6b2eee0f7aa327b9d3cc441149d2b3e446f5a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/SEYOK1534631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58562c02604972aea34eaa3dd5c1d6496ac18ce145b4045f272a7af3f9370c58. 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/SEYOK1534632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77736c1a7c55269c2b55fe198b098270e566d4f5be62141c91eec455621dc90d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/SEYOK1534633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2342ca3e1ed0728ae8ea5e99d432d0e490285a62a74d3f41ea557a627ab1c32. 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/SEYOK1534634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd51dd0425f0101ea51bbd1c185bb749b9280621b5525c111aa6bfea98a9662. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SEYOK1534636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054006db439948d808585e927a8deb1c4a4556ea595d5ca545045746772e4756. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/SEYOK1534639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd5a79048501015076e4f401d7bae53aa53333274a836164830edbb9ce6b83. 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/SE6A92111452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05d06b9868052d661363dc3ebeff3bb3851e74f79dfb3ab01fdabd95c01aba7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/SE6QE2157189.