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 0xc147eb112f6252a2e30b7ea7d9e5f64a966a5ccd3a68012e8a86b307c66183e0. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80aad1d5-b689-48a8-b3c7-d0989bd77930.json and https://artists.proofprofile.net/proofs/artist/80aad1d5-b689-48a8-b3c7-d0989bd77930.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Shadows of Regret (Passion's Curse part 2)
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 0x3f28f70f4ac91ec9035126d89aa18ab19457eea8b512fc60d2586b2989bf802f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFR2484997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c81263c8065d7de1e546ded3488f5b5a9b3e914bb3d646599f38f2dfc4263a. 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/QZFZ42503612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6993f2a5f52aaedeaf814b289fa777ef50972a2754172b3e04d15fda491fddd8. 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/QZFZ42503615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839ca779260f106cc24542f54d032334d17a4644c355585989cb8bcb13354ee7. 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/QZFZ42503616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381b7bf30f7a7abf9eaeb64c763a55018e325986be8eb1e3017345938c358f5e. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QZK6N2538173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387c76382fa103cb1aa3d309832808a0d55f573915f55b1b30e2b4a38ffd1cba. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZK6N2538174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3346dd05f1faaa140e1ed95f3a4a8ad8eb15e2ef52b6629def73dbc090de53d. 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/QZK6N2538176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd17313d696d428d75bd597a38f53c125ced770d8a0f065f27b033c557e7f5a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZNWT2538920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22df3f1b1920f71c1f04906a03e27dd4cfbf8236a932c76a4380de453caa3bda. 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/QZNWT2538921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703c2aa918963790a0cf48e9dbc6c3c460e07642bf5bd343478f52a668c621de. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTAW2533810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7856d9b72ad0fc0d98fb0ce9c0c7b92df91c2de317b75cde65e7c2b19dd7c1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZTAW2533811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed49f054125bf7e17b98b2401805ec71e55254ded09b1677738334b1d49f66b. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZTAW2533812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6675a66255655e122fe0a6b5dba6b11358c07a8ee4b943fb5efb2a7fcf85be4. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/QZTAW2533814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f5bd908d457d5d3e72ab5398e969748026b9fc74fd7866514b5cd1539b318d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAW2533817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bde007c3e778dd4a69907799f08f5de8eb321d9d929109c7905ab54b14f462. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTAW2533818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ad524883fb892ab3e8e09b693101bba6c7d96db0f02292f1b299898e79a785. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTAW2533819.