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 0x8504daade4e1a203373e02448af62e77101604c606451251a21e70e8100e6e28. 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/603e0905-c563-4e28-bbef-e4cffae87c78.json and https://artists.proofprofile.net/proofs/artist/603e0905-c563-4e28-bbef-e4cffae87c78.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 0xd9ca724c8c7f172ce9c65cd2fab0309a3cbe663f38fbbd37e4f481d0285c1108. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKNX0700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c14f2ed3979eee331f65d27e0300029e5f3e83810155c287af4a4d2fcdbd75. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKNX0700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f4414eefcfbab4d4f9fdb0899f815d32799c2ad8d80425a3216f36b9e1ef48. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKNX0700049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e38919766801a2008436af14c6ab8d272154e015d8807a73aa8ceb6164aaaf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKNX0700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aac87cac96a13cb410c93bff80e664e6b2cfdf52540b7643d73d99accf63b97. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKNX0700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3381db888b6d4cf5cb62911d154381a1d8d82868c5cda0b725e3d712e5800f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKNX0700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d66916a379af31694357ebc9e0c1e5673037950a4128e02d3cc77f3085cecbe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKNX0700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cad2deca2095ca04f62398e4470e28051b101905ee69f9beb0d1ab6e9209af. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKNX0700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79e25c9d4b50a8ed077198cb14b16c6f736104409f980c6b0292ce97c1bb10d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKNX0700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185870d27b30b4a0be0105414251d4de76b0b49d8ce61976cdc635c7ad420795. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKNX0700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeff0e475fa5dad0a864a41d49b70bf5773ad3a4e0813a8bfbf239588f8f30a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKNX0700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69543d84e664c6a8684629f39ea566e7bb126a501b70457dbdbdcf71ca679f1b. 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/GBKNX0700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06a0d976ba6b5ca676229582f0e28c466288b707d862476a08e8d9949aecc28. 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/GBKNX0700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7bfc7643c0520e94371a38494b5d75e82e4b3d33e46139071fcb53eb9f3386. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKNX0700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a4c687e53f1bec487f83bdab7b77cc9ebf4c0c986a24fd254b47ab1f33becd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKNX0700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f51251153b07f7d8f65e504019a7cd1c4bd0861432b0709d84e3eedd061923. 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/GBEWY1600170.