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 0x3d00f4208a922e4274ef87393c8eb274fe30d012913d865ad2a2605302d562f5. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f585e71a-33bf-4208-aba9-edb68fd2b502.json and https://artists.proofprofile.net/proofs/artist/f585e71a-33bf-4208-aba9-edb68fd2b502.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 0x3ba569d5bbcfe7f1769149814de32bb01f603200dff327503488b23e97d76f37. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBLLT2257021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1dde1923510af7e489fc7bbc360eb6f77880dbd23dcd5d910e272946302ac0. 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/GBLLT2257022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc762c79391b58c9d5f0c80cb60fcea116d17f82dcd91b0b38c44c0431c5d57de. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBLLT2257023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4656ddbe59418e981366fbad6b951bc40f786b37c44dba8b1a1aa5a6c574168. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBLLT2257024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc36659f46fba23cd0e1a8b4a3ba47c65c55ebc7421e12043dfcacb9fd6e3083. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLLT2257026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9cd80b8c91b5bbf0d2f2b546917b147c6778d35691ddc022fd1f7ee5421408. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GBLLT2257017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4311556082355293f14511a75e98b4e1cb25e4bf432bfda9ee31df95ece9f2. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLLT2257018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4431bbfaee0bc32c20fd70281a1f37fdbea1f77aee4f275441ba60a00e6c106. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBLLT2257042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b80afb3a33b9784aee879752faa47f460727c1cf347f253c6141766631e858. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBLLT2257046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aff3730e74e6bdc1ffe230854a6a99b5776f4ad94a61fbe925490ae1ec6261b. 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/GBLLT2257047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6090085fe49ba0118211294b7544da0e4c845ac46546108dcf382d6c47ffb3ab. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBLLT2257048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79453789aa99cd75a6c602c77d12860e2c720a84b25a3aa410a6895a297741e2. 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/GBLLT2257049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1803c9c2f217723d6dc56595ecece28dfa3f6e7bd5a3e3dd82bc9f4c3408dcc6. 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/GBLLT2257063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2b07881b7bff4808e4de6f6634e1561b0986643da8cd8add7157a2837515b7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBLLT2257064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f219f7426bef1b592c568d14fd492dd2ad29421b21349a9ab73abc01302fc63. 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/GBLLT2257065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aea19424747995725d4bf8908611006c9e78783fa4e656f81fff4e47916474. 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/GBLLT2257066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51c4355f86d01ba2c7f88c6bf9fa757d233b95db2e7cf48285674720c201590. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GBLLT2257043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2142ca2354eb29bcc73326dce4a3e6aa301223f397050fe56fbbba5b7efa74. 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/GBLLT2330748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa97ac376c229d4af6f2104cec8ba588258b2c61db3f5cd2c7681cd78cc58ebc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBLLT2330749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07e4dd32baccfd47348bd3cbd85f9ebd33bd86a15adf34aa9b6359e5a84951a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBLLT2330750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ddb05fedc5a25e1b230600020181e3e6315827760e9e9b7fada7e8c90b0e45. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLLT2330751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa839a12bc1f7fad4e7ff9a6cc36f62e55820dce84826b24252c53a4f9cd23d6a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBLLT2330752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087f2516786afaefc748fa2e83ccafdf7801f76e67fa0631e9a267ec462aeaf2. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLLT2330753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff2f46e4d51be8ef1fa392ff9811a17be4770a514be33af4b40ef17f0525fb0. 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/GBLLT2330754.