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 0x40c83bf9d9feaeb070b7c06d19d1924da1c1a4e141a8c69a704b0abaaf20ff47. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96463f6e-073d-41af-b3a5-bbef9aa71d59.json and https://artists.proofprofile.net/proofs/artist/96463f6e-073d-41af-b3a5-bbef9aa71d59.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 0xec55a5d59fe44b98652755f0846563a467532ba5e14396e2e5e3705f78644ddb. 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/JPKI02014289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d062193f31c1f090cba2e6f5378d19ca6d51467a7e3e3fac57af311f886458. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPKI02014290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7758df23886aaf00c96807f8d3ba97a1c00fa999918e7396613cb03ba10cff. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPKI02014291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54e5ba041382d43005777f9c4e477ca419105ee5c70568b40152687ab2d8434. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPKI02014292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e33b1c823d62aca19ac2d2f1cd8d53af03c8c593cdd93c7d8bee0c786fe2a6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPKI02014293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e825e5ca21d21805dedb3b3fbe41152733dbea434ef10da636c288580103e4e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPKI02014294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5706af718795b4c051ebcfd5a67b68bab881037e03c676400c6ca0027cddbd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPKI02014295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d6e66818b40a3c75dfba688d12c13e474a6cbd3d44d7d90a9d9a2607590243. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPKI02014296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cecee1423361cec49973f749c38430c13b7153b386263aaf011de9ddddac0e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPKI02014297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47fc227bac26bca4ff3ea4f9ef144ca238feb9de94048cb5d39843693c30319. 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/JPKI02014298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebdbe5018ae036ff4a63e45bb2495632f91980f93a3f03c4aca3b4e7f83ee5f. 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/JPKI02014299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329a1f3060658ac90254a14dff7ec80e51fdc2b7cd381880799a7eae8f66610b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPKI02216040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e55c5a3d7b86aafbd5c5e0c260898056856cbf2df1bf471de4674c70088957. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JPKI02216041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031b631327fb17ad1df2b0989142dcbc5d8bd3b925a29f3ec039d198da9ccfc5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPKI02216042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2581bd20b8de8dc80b928110d326aa068f845719dca4fccbbebd15ec3ea17062. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/JPB951314380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4704cfa8b628215ea2c604652d9f54b5d481f811b7e380b698c637a030daffa1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPB951314381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288dbbea589956bb33ab6350fc387a516babd15b91065edddda7e351fc7a84a0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPB951314382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0205e902efd175657c1baa5592347853a3add4eed440b0848b61adf6a8262cad. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPB951314386.