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 0xa88947e64eaf92561ce3d68cd642cb0cbc650a04160752e17665a116350f512c. 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/f6b40775-5d9f-4cc1-aecf-b4df846ce9dc.json and https://artists.proofprofile.net/proofs/artist/f6b40775-5d9f-4cc1-aecf-b4df846ce9dc.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 0x191ed129dce2108ea77e84d48d8daa4a2a00aa27898a2562c4c75e601d2a6c31. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:32:54Z), 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/QZES72063485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6915d004c8d658c43ec30345fca75fabf7943717d7cdc8543a940833535e8b17. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN82080924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464512e54e8e89555825b9e3a8f205a5494d72ecc05fc13c34d123842ce60614. 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/QZHNC2031622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796594f032a6c195df5d8cfd27d8290ca1e80819b3b7ac99962148f6d3af0bd3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6K2039067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54de14e3d48229d070f536c7a2c68dfd43f50279adafc9670cdcebc85dcd6d04. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZMEM2016634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85eebc437802b10531f2042f8f9252398ce7b26329845a488f36fa015797e38d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEQ2038489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f02386c05c6416c3b05cf920e9d12a77e5100b5f083696fd22b2ebb9ee2b69. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN52129359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb4229e115277f4ae287b2d70a0aac71e342f6477de013dda1f0082e8546fe9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWQ2139381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa739c0fe35679765bb5a145b8a8919e182bbec1ad0e45e7db4315a472844d661. 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/QZHN82229063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4c4d5ac7d5e1ab8a213ceb9fa445a7cb96c46ba0cc3c9e4b8b09ef50f611b1. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:05:15Z), 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/QZHN82229065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579457968df278ffe9c45e161357f8356b551ee33a90fd9d39df63a32e2ee0f3. 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/QZK6M2242843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb91d7b17f54000a291788f36e23ac67f0653c3e46bc125aeb70d371be04667. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:33:43Z), 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/QZTAW2330537.