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 0xe6c6464b599b95500710523408da993b74103033acc874f73f25149db5220e82. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d653722-4baa-4bbe-b57a-893014b0912c.json and https://artists.proofprofile.net/proofs/artist/2d653722-4baa-4bbe-b57a-893014b0912c.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 0x5f1710d5dc3015ebc9c6c4dc81b23ecdbd4a2d98a36f4d4c22760df982719b69. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX872170354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd9c79d6d3df3822e0c4e12404c2da3d98a39da0840216e7accd47fba386dd0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX872170357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb37e1ba13f413bafcc10330d68826e5d89f9df6b30e5676bded14581194a2c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:15:18Z), 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/DGA052255902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3ba5e176c2bec8ece8977e6ac6632eee2ce85808fdcabf0ffc5ed2173fd7d1. 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/QZDQH2371232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da2d1a63d33ba8d3fa28a8af3b7a84cbcf20f252e5178591e0b2a775447e56b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DGA062388625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a73d2a604e1af8ebab7340d603f88ba83d4e8ed4c5c27f740c054083ff636b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2347746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d9fd0160b5c1f0ae1b2ec3647415e989da72d47dc3fb8e72245f8677b873ba. 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/DGA052446009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5d9bdd15570d001bc4886653fd1d51563f331eb2ed7e63759f210679c8e5c4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:47:20Z), 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/DGA0L2422267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08c76e3afd718b86c9774c1f9c331ea146c73da43423a449c72af0aed472e2f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0P2442990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03afa2d7edaf122da292a077a911f36b7b30019bf95a6d52076ee6c7d9c71407. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA0R2413395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5291173740b8e286318476ba6ff4f22785e3ba99e2385546fade018beaa76871. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR10S2515849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d837e089e54458b1a5df2aa61c5c44776d1d711fef0dfeff156e6255971312. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/FR96X2511925.