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 0xbf6ecadac4799a0f1b3adc71a9c5fd6b2671172ff188e42811c3de5f9d661210. 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/b5ab69ac-d02c-4608-a308-932399951c49.json and https://artists.proofprofile.net/proofs/artist/b5ab69ac-d02c-4608-a308-932399951c49.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 0xa2eba05bb60d22ba877ad8ea8676a7f1081d0eec3ef8ca69ea520afd7c5e69bf. 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/FR10S1755244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec525fe902d1a8e9cd549c3351e21ae40065990c544668bf7ba3ef02a605caa. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR10S1755245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c35a5d37d79c33810dfa85aa2555a6e00ae953cff80c2034980d307b39e721. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR10S1755247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa280ef2975294c67f9830d1ac9c441fbdcb31aa61cde14980b166c4d80994a32. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR10S1755248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d39940eff5dd38ee5e6fa6417ce208296db6a02cc69d9a42f859e004ed458fd. 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/FR10S1755249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2699f9822251169ace3c73e41f646a3ead84b3bbeff53c7a16b630818a5c60d7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR10S1755251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6510cf341ace7ee833034d8e63e3e8245f94d3ebfb1c91ea787b409efa7d7ebb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR10S1755252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7198c6f4e96efc365a3fb8b5e260f9569aa9d861c249c506ad66b53618f2af9c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX282090737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2846051310367205773916e54f4fbb4a79ed0121a1fb5902f5911530fd0f09. 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/FRX201905504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297c797c3fc1481872e31f241611ddbdce6252b034395cc798b25fb73ccd8ec7. 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/FRX452189167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755b5a15e04ba93aaf4150567adeff431a7e902080800db3bbce5784b418d558. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX452189168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f472dda9855270cd9b67dc4b892d5ca77e252ddea60ac95d85634cea25ad8e8. 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/FRX452189170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdcecce0a486896e8d2bd21bd2fbfb6a66178c7d029bfb85950d3a82e3f8552. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRX452189172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdecc7555674f7c92d8809e3f443f5ee0a07ed690673b984723ca3d2a1000c56. 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/FRX452189173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abc2b2c3e30bcfe034040cb3c2cb05a9e627bad91fb3464eabd294112c3838a. 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/FRX452189175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4387567c71d2e97e62f2b74cfae10f92b40295982299b9c7f8ff1d135e212c76. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX452189176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a373eb09fb958a1bb3c9d89529840c87c49b9127b2198178688b35b262ba3a6. 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/FRX452189178.