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 0x0bcfb4e741e11449af39760cc6375755d272cfb612185a380006807c8419d047. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c061e870-c3a1-4828-9408-000e894ab7b8.json and https://artists.proofprofile.net/proofs/artist/c061e870-c3a1-4828-9408-000e894ab7b8.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 0x21e9f67c05285e247eb2e730c54027063c378c9b5806132f35736c383ae2a328. 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/QMYHE1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f876089ac63ff669de69749b5fe55b45114cac7b982f78360712080b583785. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMYHE1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4310808414c5b9e764e476f15131b0447dc3cc05dd128105da38b2a71ebe4ebc. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-21T20:51:33Z), 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/QMYHE1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aee831d6229dfa18ab6acaad1fbc14c1b9aaf40523256c74619b01d05a5291e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:38:05Z), 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/QMYHE1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2a02032119bb294fae07a5f290342c6973ebef8aa4254c9412250a4dc0198b. 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/QMYHE1100002.
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 0x4bf07e06eabbc055d75d3fe178f8a60ca1960ac66bee39b2cf7ccf3f1a676b24. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMYHE1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcfb813e8bbce47e469c753ccba75f3ee90663d8f75f45c8f43e48061e4b3af. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QMYHE1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b8e7248e647eb0ee7fc79c2fd83e1a30f80987c405363fccf03ed696246003. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QMYHE1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf24937dfe483bff175df1fcd33fae992046934465952142e3efc71353841fa. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMYHE1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c434df094408ebda28bf1c950f0b524fb6a38b15106fdaec065606f414eb10. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMYHE1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9884a6766285807dd6b629c8aa4a74aad40c8f5afc0e7736161007b38706344. 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/QMYHE1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a01e77dd13ba7cdc81b06d23c9fa9a828853a377ee9a51349f3317d901e3b5. 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/US25T0523220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c1587d8239e406b249577312a563170f230546b85c40438f6ea0c342b6a54. 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/US25T0523221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99235999b98e99cbc95de077ae34340e15f0b6e16a647067d024fb190bbf64e1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US25T0523222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182da709e51a688c38462f74348239c5e7d0efebd0f7ba3f3289f29ebdc79b71. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US25T0523223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2207e9319a8731bbda5a97fb8b8cf90813e249e0843dafc20fc41dcf0f9af5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US25T0523225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41929e51b43f09f218e5dd49b22106661f3f3a0c8dc374d9ff75cc30cc122fe9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US25T0523226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a22a8fe877b4d18e7fbe829a7e726633f2d58c9eb6506f260d23959a1aa852. 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/US25T0523227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22d5e99ab06f9007147433a25b9491d0acbc0443236d553baf1d2cfad90f5aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US25T0523229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51d19fec84ba6325808fe17d01854ceeb54f978a3d9ee09b043be1818ed761f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US25T0523224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf60a343504931df358d9944d475e47a170615d1588772fd47430b99c2f4420. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/US25T0523228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e08af0844f9a4cadf9f1b291c47ba0490b4ee0bb5174aa0836dec44fe555d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US25T0523230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0098c713b45499b102cc0bb401c39f331f4029663539576cb17db80e8764ef1b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/US25T0523231.