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 0x4e54eb8ed511d284d73894b6456ce9ca5ae2b9897c7654153e8df301fda798ea. 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/64c7924f-c2de-4276-a160-0bb9ea3a7f76.json and https://artists.proofprofile.net/proofs/artist/64c7924f-c2de-4276-a160-0bb9ea3a7f76.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 0x4d13bd20dffc7dbdfecf9b097c83352f42d55fb383c4ac18c521e1a2a9b3492a. 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/ARHXW2000370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8718e1f73709865219c3a467512483888ef19958ffe8daff63774e3a2bdfb7c7. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/ARHXW2000372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db460bdac1d2485a8935e7776a25aef830b8cdd75ad73228f729cc46d73ba2d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARHXW2000862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71243dd97211f7c8b73b851b2cfd76d878503064c2d1db6e420d8b30b3ed476. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ARHXW2000865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cc22e319f79a95de770b81111d9f0e4109f05f0f77cf81c019515ba88164a7. 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/ARHXW2000870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce92b8d0ab11216daa7292280612346aacb7348c4c13229416440a8d3a05ecb6. 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/ARHXW2000867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea78081bfef65df3d81a54c3497cdb445641df760681ecde1cf39c5b5c43c02. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/ARHXW2000902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9a12f3203e5e6f20d24a8127124840165230f1dd0dd00ec9356b92e9077e75. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ARHXW2000905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015ef1366cb1b7fda931bf794a6e73d114d0cfc1266e593541e09b984199c84e. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/ARHXW2000890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a8cc34de3ee5f46d16eb0e64d5577d818555a9fcf113166afd3730b89b1906. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ARG601200592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed786dd0639a491cd4b08b913258e9e4b389ff0a25529d38fa9bf2b6b7c4f3b. 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/ARG601200594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef4036072df593a97d98bd404d058d353dceaba9d7559aa79cc1bd72d9e03e2. 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/ARG601200596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4439266ab51a170626444cdae9792caf4ce6350ca85e3df0781b00a3bfade8ce. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/ARHXW2000939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1c63e61182a6a76abd65ceea4bc182d27a827558d794f72ebefb43d228a3d1. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/ARHXW2000942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e00ada0ce5e000249a30b0b274b8e4636ec523e8ff90d97adb1a73e446dab16. 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/ARHXW2000949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe192c8b899d4d68c23e708d7fd2f76915e6e59cbe8b4b60a5c46c0bb1e751dd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARX451600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b42d28a2bef8d09ff8d82b8241bfc138211c1352cd942dd564a08c69fa71101. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARHXW2104997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a79b9c44ac427276910e2ce3b101ee49b39710cec55894451ee6c05956e1d49. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ARHXW2401699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c08750cf27a4856704c093125ad5cfd43a0f11e3d98e4e0ffc5f4c1dda94d3. 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/ART581101516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d7e352b1f56cafbc7d5f787cb7c34520779cc1120d3299bc2005a8b62791e5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ART581101535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195249108c8f055631a95500ffe7bd9109ffcdb9ff66aa1ecb238449ca0ef014. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ART581101627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776c185bda47dd29f16037de287cdd0220e723bd9236d63794a1077eb7e795b1. 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/US3DF2029588.