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 0x53a773bf049e4ca235a5b6fb9298ab5188b0b53d530273ab34ebc2f3448bb95d. 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/06862cb8-54be-4428-903d-8c5113d86b7a.json and https://artists.proofprofile.net/proofs/artist/06862cb8-54be-4428-903d-8c5113d86b7a.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 0x0d4f60f06a1253079ecc556f224a47db0de23f0d3eacd7f824e8ff3398d99324. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ITK751900243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf015cd068c2ca055469811b114fac69ad76bddcab60d92b1adef6cad9862311a. 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/ITK751900244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b997435c03ae121454b1b278602c7c79408d207066a8d5eadc25da90e8aa9b4. 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/ITK751900245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3234b7d6e0d7593c2f36508ec85102432dcbbb56ca5122b79c6d3ace183839. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/ITK751900247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124af403389cc845572550e27c21891676049dd292b625ce85622993763ec437. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/ITK751900248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f092fe03f7920923126a36eb8f22ccc1b209d9d69c68df0996acab051a5275c. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/ITK751900250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eb5408547760899c0fa1c278d1f1c08952e00ad6246d0e21baa175cb554344. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USL4Q1963218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010f426bdff89c974bf6fe01846ae305f05873b8d7729801be1dfa1f6131e7d3. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USL4Q1963219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606a18795005015096f10609fd23f29d1daabb07c1264cd17d9b73a37e701cb0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITK752300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235ed09b2c327c4a85f5359c20e81068087d5695db940bcf6cd19a90b133f393. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ITK752300263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b480c23c474cb73f65c48c66782236e7a926f45e9114a5ec06d037bed24183d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ITK752300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e76786a01c9ed4b2afeede9fc37ebe43ad2f1608c6fb2bedff681317f5176c. 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/ITK752300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d521f6d3f10fd719763f10dfc6465a26e6d1050fdd9c39e56e317d96eb53b2. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TCAIX2438372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d307f9da64ce3f0714ae6910d7ca8690a6aba2251d58baf31c694445e9852f6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJA2428582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c2473ddeacb13e8cd2c2c2532cb73297516075aab57c0a4a8146e186c6ecd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAJF2593777.