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 0xe6ac6944254dcf1ca5626148a9db8fdb7df29416a8519709841a0525935a8ed4. 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/ced5e9d7-8d90-4c57-87e8-829f0ff6e4a3.json and https://artists.proofprofile.net/proofs/artist/ced5e9d7-8d90-4c57-87e8-829f0ff6e4a3.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 0x4a185805d9f686f243da7d524940804769d40f01f6c0723be3ed4fdbab772e45. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BR5TG2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c5cb5c96ff5f4070dc2001621a17843767fade09518a07ae7254b959c3b10c. 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/BR5TG2400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45cdae959e47cbdbd41328b60d89cae36a3f12aea12d7f68d6ee3e2d319944e. 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/BXM2C2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf400a25075a9a921ff69a6bdfff3a03793087c9f95f70403580c44ebe72610. 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/BR5TG2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe89ddf62fa07011503d47e414b54fd13f550371f72a26453bbdf4e3837c830e. 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/BR5TG2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdf09bf8ac4e8c8dd63e24d8d3dcd4bf96faf14738baf0517eb983911be32b7. 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/BXTMX2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2278d8d76033d40d3ead259528d93f3f6a19dc046fc6eeb18956ddcad310ace1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCLT92200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d64936b487fe76fbe56bdec22be8ae02faa82f50812db723cc96fe335570ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC6M22501589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f091d4e79ae4ccab241e2fb715322bf5ce3fc083ed84aec6f676271f7cac94e. 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/BR5TG2400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ce80e04784b0a63994f72aa3824c3f8ef77f7b194c2863aa7ade2d6218f23c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BR5TG2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5141ac60773d4d5fcc9e549934e59f9f83067dc78b08768c9eb67df9418408c5. 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/BR5TG2400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c3a46fa2433658c47f4941933a42cb5f2e6c3a6e2f7f189459ecfe7a8a0b29. 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/BR5TG2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce2f07d7f22ebc2bd7ceb250243524df2c57aaf92cf745b49ad690e22b0bf1a. 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/BR5TG2400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6893c007e432cc3b64fe10617fe5f43b8c2364d59e94415e285e4565527ccafe. 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/BR5TG2400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f2c3f2a906daf3216055ac68e76883744e5a7ea7fe32747c0ab547a818bb0b. 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/BR5TG2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f091d4e79ae4ccab241e2fb715322bf5ce3fc083ed84aec6f676271f7cac94e. 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/BR5TG2400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a185805d9f686f243da7d524940804769d40f01f6c0723be3ed4fdbab772e45. 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/BR5TG2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4145518b4c152ffa57e357592b96b1ac411d2ea38e76c812177eb6462cad28. 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/BR5TG2400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21fcd0136e62824cb23a6c516fcbf070875c9bef2a3878f186ac400d1149895. 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/BR5TG2400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2e09903c808316812bb5e82d892cf529cf6a687c77e98c9420f9a314e877cf. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BXTMX2000025.
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