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 0x283695a563fd20764a70989abb703654c6a3e51deb345441b4bee15afecee3f8. 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/2814732a-7d13-40d3-8364-473fd6325904.json and https://artists.proofprofile.net/proofs/artist/2814732a-7d13-40d3-8364-473fd6325904.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 0xc0d91b4b50ca50297d4200976443ec32bb708cfa230833831158ad91b9ef4926. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:50:26Z), 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/GBKQU2213882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859a4d2deb12122af46f1b1dc2905bb09d168eafa1aec118418e0646c1fe1f9b. 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/GBLV62004875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0786c56af4b4c456f11b65b0e2bdf6172432cde0d8554f4a6396f351338c15. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/GBKQU2116995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364ad0d89db97fad00b85d951fe8e8cd0c6ac95077f82a144b7a9f6790f4bdf8. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBKQU2235622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc460aa6ebdd5aa68cc8952a2ca1142e8606955645a563f3d6c8fdba31b8dfa5. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QM6N22267310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b51ec367596f4eebe5ca87bc1925df5a628c9ad39e310c348055832a7ec514. 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/QM6N22250546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7cb4dcc8b780bb50c16e3b982d497198c349b632b73c865e544cecd71597e6. 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/QMFME2227294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c30c5f64fc517c52c507e47f1c07d9f0121542e1d56968ba542dd02931d3880. 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/GBLV62215415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90ab55686feb746cd3eed06838f5ce1422cefac99498f5d3105a9d6eea4b2e7. 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/QM4TW2306185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2ae140a92ea2f2e141341f2e28ff606f57204404a623744e21067c92312794. 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/GBKQU2360452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a96972b54d17de67d82ac8358b78a6fa4e6debff981de6ff08dbf9dd15a407e. 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/QMDA62378816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862d268897fa23b952bd8598486a912fdea891c134355c2cd6469c3cbb0bfe0d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBKQU2389097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207c63f5ff030802c3776b07165f32dcdfd51c99fe85d75ef2f901a48229db37. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QM4TX2446438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd382b1019c7e9570c93eda81eb1bb1bc783f065c7d290634e65ee22b93f9660d. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:52Z), 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/QM6P42494888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2982213580d098cc3fbaa2148f86e17e2711e2d351a8b8b02f86e52d90444a5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QMDA62423307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f795151eafb64abf85e1a06d4a21915f4c1908e997e46bbb9899bee0f96e9c6. 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/QM3DF2449760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3788dc40ac5faa133b5f31601a62a29825fc2b5432e09982200316a499fc1ab9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMDA72460165.