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 0x4e31c22c328513eb4b85b46a20b33c8fcfa4350f7c108104f02eeaee6ff1b034. 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/f874cc14-72a5-4398-b338-7428aa1c3c09.json and https://artists.proofprofile.net/proofs/artist/f874cc14-72a5-4398-b338-7428aa1c3c09.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 0x30ea2a10b0e05da3b0cf0718ff2758f459e05a15562f6c30008ce9773028dca9. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/TCAGU2310657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5bcd3c0994cb4f1c10d9f2be87d99617f60eec42cdb940d92aac2843ee855b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX282342394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c79f99a0d8f3fa3d8ae2a4fe369b6fe9a86ce9d3c07fed2a4e8b87d45a6ac5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRX282342395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd78a64a91200ef49ac9604a4a41d3b9c2a5a977dbbf780922f1c52deef277d. 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/FRX282342396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e93125325a9286bf6bc32880fa11ec682fa85ae20aac8643783cc850cc9636c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DGA0H2373963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c907d381484a89cca30c9aee3d7834e08cd150ff7992b937db84b0032d8d43. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/DGA0H2373964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9243a9ca40829b9fc98e77448ecff147f1ddda0a224e181c04193a4a8c984792. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DGA0H2373966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2566c1f6ffa6b592f7bc89399cf75f98b5f1fa6ee45137dd93d63e74ad09a2b6. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DGA0H2373967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dba2debc11360d99ddb0e6f8adedbdf678defa08e1f3d5c1aadf157f7dd29fb. 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/DGA0R2324907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd50a283c697bfbdf3daccce8e2efef67f5560763f7204705a86e88b0e0d626. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/FR59R2456045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e60e02a02077c7d9598db6b2143f0f4121bf96f309649cf3da34ac2bc8d2d84. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/FR96X2440898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdc64ecc6b44ac4d7c41a78d2f7394b502a5263a44becdb670ead9c6c560c21. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/FRX282432989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a5a6136679afbaf0fa3904838c13ad187eca8a55567ed0483c03b93d0c1069. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX282432990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe9796c5eb31bbdf3c6d5f3c03fceb05b9916e6f8e791743383c912b3de222a. 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/DGA0M2424353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5542362fdefa350e65da2a3a5ff0c87fd644df324116a040261363d6cec05490. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0S2441118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d7366aefc7c7e6fb7ae25f8d54872b9caded018c51e073ec65e48bf3c74608. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR2X42578519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0e7fab1564709095ea46b7a8bb8063653b81ccbd3e9d1495163db78603473e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR2X42578518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903e09e82acbcbf26e0f9fc469202eaad048934f63020c02dcec957d11ad8d5e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRX202565330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717f24a055bd5059d47004fd8a2dfa6bdafe9d720f7158d654ae823f50df0a57. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/DGA0Q2491547.