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 0xbdbbd292394a0c6679c3339b5ab46834514de965272d007ec4eb2b4ae8e06e3e. 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/9f46110b-c19e-4465-a395-93e5cdfa7ac1.json and https://artists.proofprofile.net/proofs/artist/9f46110b-c19e-4465-a395-93e5cdfa7ac1.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 0x753d66560cf36a440d823fd67fc09a93f9bf289dd33cb3cb847013c804b85e42. 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/QM7282413254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fffa1f8ed1604b2d941bfb63f2a833a492df38f1b4aec391452b170a2c8297. 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/QM6N22423943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96478bdf94352f63ed15b3b350ace563b8c3fe4555475c1e55fa839aa6e9b0. 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/INM432400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b9d1d5982a72616317d633b978c628ce075c8ace010f46f8f35984d88bcc32. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM4TX2457713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2376b4c5ef6c56b8f69e95f738daa79f18b6642172321c68d18e096eda47f4. 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/AUBEC2417605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4e63f82d44ee69cbc2b7cf97d1c85c5b9ec20b1044c7a9d1588ad4c9c7e63d. 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/QMFME2392848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae584d29f2736723d14b9317ff302f75479bc3a894b15d7fbc5aad19559b7ebe. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMFME2376835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9389e81c3b0c91c46ecbc6040fc00bf7494d266c2dc64b317180b5c0d879a94. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTBA2376339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0562cc181f66433932ab2e7816b16f667e5829cdb46f62d725fa07c682ea849b. 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/UKXN22398228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9d5d75d89e2c529dd0ad05b8b3fdf62323eb5ca865410bb47b29ae084627b1. 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/QMFME2365964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b2690551bb889e40ce06be7320f2fab7d7665d6984f058d8d1b989968290dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB72302138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ece4aaa82b9f08a9a8d0bb23aff3fa709d8b76730f0c8521577b4cdce3670e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB42374152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c2b05f326c0b3b77b2183740f865d3532206474461fc5e8ecaf95e04203b21. 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/AUBEC2343438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb30f200a0df5ec6b37e3dc76e2f212dffbe3a81285033cd0a24c4a35bfa346. 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/AUBEC2343375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6524c14f30e40c6c6ca67c6058b3d7a5a563dcaae852c1bee5db15154dd961. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA072305399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a257b64eccc45e2f0ffe1fae06c55718cf4aa28588c969ada007d8d293ee10. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAGQ2238376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbaa006cbfcc0ab5a93f9af7c9a675ab889f18e9896b7e0a3c5ea8310549e74. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAGQ2223446.