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 0x4cb6d141535c75030ded7b99da0e6d5f6dc17310a199c9f288b99c8d8f5cc66d. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0d8bcee-e9ab-4991-b797-3c896adc8e0b.json and https://artists.proofprofile.net/proofs/artist/c0d8bcee-e9ab-4991-b797-3c896adc8e0b.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 0xf60cbec3a864f51ab277cc162cf5427ec49719da1ce5e5324dd866362745b72f. 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/GBCKK2371301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40675d2eef0d29600255d08a4310b7a28d0bd7259f43655e74d5e14b78cd423a. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/GBCKK2371302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0048c97405dd42ac97ff80c8cc014124694948ae516753444a30ff44488e12. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBCKK2371303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dd59e068394427691a0cc363f92c8a40e21915ee86ee1c190eeed4b48e8197. 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/GBCKK2371305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456f77376e2d888005cf2da956963f9bb77ad09f07453e34c70f3a53dd6e71c9. 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/GBCKK2371306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3562ca48e0056a6e00fb7d67a6511a4fecb663bbdc32378f60b4f20a38d215. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBCKK2371307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de283e13a34b783cab977ab81e51d07052f59f027c2fb9aa48677e95eec1081. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBCKK2371308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce569b1a791f458feb4b53cca41f28155f10b88064559f88f4d01dd49a793a1. 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/GBZDN2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b4533d61ffb3d73ec5984bcc66d65c359ad08331bccc19347ed7e3076604cb. 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/GBZDN2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608a9b58941089fd2436bce75c240110db399767cfaff49ed9e3c2ea333d4633. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBZDN2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222d148bcb8c72110c8646e61214e706c03cb9c12a8ac343160191057b84f466. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBZDN2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6aea7130400015e7266407cdb31bd09267f36e7f3709f69f2331071b0a2f1c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKJLQ1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64687521a88b9fca96e26c5a7489ff2b730c9202c5f7e09137b1051499f81209. 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/UK6821700802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049f9e13cd31f7655a619eb438ac5bc597011e269b507e2aa62b698f09e5f1f8. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/UK6821700801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60cbec3a864f51ab277cc162cf5427ec49719da1ce5e5324dd866362745b72f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBCKK2371301.
Progressive Causes - Progressively Crooked
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c86aed4831cff58b042466b275c675960b3872138bdd5fd1698e9d4b6b9377d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBZDN2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a037e533e40d35398f4a0d49e184fd1a0441feac7f473c78ced5c47e61e3ad3. 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/GBGEY1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f4906f1eedff56b467041609f046037041c73332244ac3d0b4fa08c9e1922d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBGEY1800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97604ed2821cf6c31a78fc9df0acc7668e247f1af1a1e1c3e82996cdee014df8. 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/GBGEY1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01f93d91b7d5a3c286f09b34c37178632c9cdb6b177c278aa2191f423ee82e0. 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/GBGEY1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b30c35483e231b55dba1687f7b6e35cbdb9c9fbf850cdc72db443ff4f341250. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBGEY1900008.
Fun Destruction - Bas Jan's Deconstruction Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dd00714608b367cf895763ed252479e75124aae1e49777cc550fb031ac4e05. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBGEY1900012.