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 0x2c4aa4fa1f21882b5007e832099cd2d8be4cb57475de7a6cdbfef248bcbaa4ef. 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/fa0ed62f-3d2e-4b97-b363-f47d8948c749.json and https://artists.proofprofile.net/proofs/artist/fa0ed62f-3d2e-4b97-b363-f47d8948c749.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 0xc5b142831b3ca47f8b62af02b7816b6971aefede537873a1605d78c5ad46ffb9. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/FR10S1899170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1a175cd72b015cc439b5e4e224736ef664839927177a33a5ff5e60476644b7. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/FR10S1899171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57f73fdc6f2531003b41d155d0d1fc3587314e1080afca3e3f8025eae0dbe9d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR10S1899172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb765c9e33c97115ce4c937dde4599c0aa507d1fba58ef9b557b6f9d495befe05. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR10S1899173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b5602ae3db478ffeeac8b10f3ea5dde4a5f05d34fc411bb16cdcb6b888e98c. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/FR10S1899174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707100bd13b3bda4e92bfe50b60f36171d4b48c916722f98b868d98cb8c9f219. 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/FR10S1899175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e88ed10032f749b3ae180084bd6ba5793d0bca9d5294da4a82fc4bbf07eb76. 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/FR10S1899176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0459fc42387c072dcc158e6bc90fa10d7e24dc7d81b42f42d962de20e29ebbd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR10S1899177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b86d870576212b8a6228eb865262000ceeb8a008f25d47e4746fcc2446184a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FR10S1899178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9d160be3432b0d52da033bf9a7febbf8c56c3bae015a955d49ca37b3915074. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR10S1899180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213301f55023ff3cd0abac3227f839167749887673f7a0e867be1469334787ab. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR10S1899182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69defd85c075abf999b6caef6c62605e55d0c288f5b510a18952162f6987383b. 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/FR10S1899184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efa5e56b69b0821584406b7c1edd10f5ab4ad61c12ef5c48d64ab115caec185. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR2X41900467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38aa69ef3669b63424f917056cf87bacb48b8d414415256b750c42bc7de7bc5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FR2X41925909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d82dc3108ed929835acfa4bd96d7113e8bdb05108541f7ef4bff789358a9612. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/FR59R1800651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a86d0bfe50f911bac2b10caec16fbc2508e45491511af8fba4573961601a6c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR59R1800638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfba97bd016ad30b140e847949965aca8bcbaa49b7aaf43f80d1002d7b836fa. 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/FR59R1800649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3899182bdf4b61783eb1c07566af0bc4e464a3f1de067a7e17c1e7de4ad4daec. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R1800641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04100aa04c203228b811f793a7a32685b6e583f85b26c89d709f3fa7ce4305ba. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR59R1983078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a6052b294ac4971bb9ddac26193237d104d0bad86c720b292da9464130f085. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX452055738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92da133ad6bda66f40e4c422cc8d8fd86b2452fc3f072e1c205cdba6867ffcad. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/FRX452097524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882c3dbd6bffea6c42e143dd15aca10c3a62720294f1b8d0bff8717d4777cc4b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FRX452175706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5074a179aa039ea18c2479a9e525f52aeacd981fb990cf236462a39258f7cc43. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/RUAGT2207750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ea579b7945e8816d5558c01b63ab4716ab892eb0788cf7a237ff974d8d078. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/RUA1D2295584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eef40927d58d1a49c4a28a131dff2777a4b2a102acba8601e8a7810bc2aa812. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/RUAGT2224667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73de541edae0b85d11b43e65838123f579ac660b31dd22e0b89838f3fcc8a910. 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/RUA1D2438904.