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 0x58dbcc863230717010d384dd9e4e79834a551d6eb054902fcc796e026f7d4ee0. 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/c52d4e58-3ad1-4825-8451-bbf60d350e11.json and https://artists.proofprofile.net/proofs/artist/c52d4e58-3ad1-4825-8451-bbf60d350e11.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 0x74fa3ab43dacf24d7022b9dff831b068a7972f0c229f6d1d0ed94a2e8da0fdb1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBGLJ9609002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed679b6ce5055e3c5fbe1f772e90a5803db1e37ef03b913e3ace0e6a2b36020b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBGLJ9609004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61aa0202f12c52de947e2c59dadc808544379d7baef79df6533c4120ab25a53. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBGLJ9609007.
Nelson Mandela's Welcome to the City of Glasgow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6411e6ea30634f87842cf4bd02debfa3cd9158c8c679e64b4a2893606936d16e. 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/GBGLJ9609012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2aabe6294105b675e2f602d892e3a814e75e859b24b2b8f7d50336a3e034970. 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/GBKCM0500183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a433831a9959d753897a06d0bcf9ee68635a3ba620d100c4cb8e451cc7ece2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBKCM0500188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4dfb8c0beaa2562b0f9a5f6ab71b8a815000c6aa03272508315af9eea41457. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GBKCM0500192.
Stay Strong (Bithibh Laidir / Rester Fort)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b7f0e9c1790b4dd30d7c80d8038b7161823dcdf8a73e02a5bbda3daf325fde. 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/DKBV70820008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9e67d11c4a8c0354a8da5b141e8208d2f67f226c8f72790708c09cc3b86b08. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GBKCM0800326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3ddeb953a48a4b3b1f77b7cadf6aeb4db4588fe8538b8a8a2bd14393811c93. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBKCM0800329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29211da5dc7e736f492f58f82ca9ee197d0f4431ad86c8ea1828eb923ff27e20. 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/GBKCM0800330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c85f354d2b3cf57f704dbca8d5110ab2a323a4baac3fd75179042fb0ecbb192. 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/GBKCM0800334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d72d1025aa9e0c91df10e110a04e3fb9eb50ab35d26a2218910a352b3896bb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBGLJ1254013.
Italian Chapel Suite / La Chiesetta Italiano Di Orkney
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673bf3e6696aad41c80f6dee8ca6d809d0c166042835f7d4000d0fe74dc33a0d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBGLJ9002003.