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 0x08fa10ac44190434b6f268eddb0355386a8266b3f446ab49a8ef203f0ec359d5. 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/8a4bfdda-eadf-4342-bac3-59b1a9735c6f.json and https://artists.proofprofile.net/proofs/artist/8a4bfdda-eadf-4342-bac3-59b1a9735c6f.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 0x38b87c8257efb440a22b550f48a3af440993ae8e8a8753d25c50b567a511db72. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEYW82407950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9634400ea39f9851208bf799f52e277501721cc0427388d5f9f65debb506c9d5. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/DEYW82408579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c2d2d856dc7fefe133ca041355a903c45add122983401a8001e5526210fd2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DEYW82409701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154a1cdd11afcec3d0cce6328db45d60e722eaddd56892b55250d73361367143. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEYW82410452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ade6ae54c7118587e527f88aedca4bd33a641b2093e23aefc1d59a83b46b804. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DEYW82410087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1963f21c73b64b4ef29054bbd19a15b23ca72d60e687addc324c264c1029da0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEYW82411862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1a35c03a18d73adbe52a65f5c9bd9de586b87ee9642241136617c1df3ca1e9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEYW82412469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb454fe445314b6afa73ef8491efc4c85385c7c879f9f4e1a8213361ecc4f5836. 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/DEYW82413318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307ba71799a21f5a5bc03708b75c70b205374756c8877d2e52a5c7c098642e07. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEYW82414330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc57401b0515ba6816bd6f8d1bec77fcddf653a6529d3d249abff1ef27a36ec. 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/DEYW82414322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566ad965a5e21a4acf891d33783ad18707bb6f462a0d08e2c5e9a95376e55500. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEYW82415689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8557643ffd0ab2cdd7f40e4f492f8649c7e6192248b27646a8f5bd1d4ea062a4. 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/DEYW82416405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a86a4071e833ca12bb494a0b95444622709956fdbbb4c0f1eaae82a447ae8b4. 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/DEYW82416603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40f84ac57321004feaef7851d0130f0c0d2ed3c845f012762562085e4a01c82. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DEYW82417896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c00807393a39e7fd82936efeb847baef32d127543a30859978a872ed3d282dc. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/DEYW82417746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4053b1b9ced2deb54569550c06a6eeade4b30c966043b6ac0402733a1d081a3c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEYW82418851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a5597027fb8ce50d4ee5290288976f2d6751f43942d1de589c21d70d19a2e3. 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/DEYW82419964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4af27e95a40460e5b354da1e1c1a25691425cc9ec3bcd569c4f37cb04fbf80. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEYW82419988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16104d0f10dd3b99a28b1bd09bdb49fb0127580ec9d6d1a1b61d5ea738c70f5d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEYW82501946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5248fc697928a2ccb5a6be199d29e667a2fb90606bad04c6fde8e5b07dca4ec3. 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/QM4TX2538177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fc67095cbabc8f757a23ea368db8640fdce11154a1578d999078065783c338. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEYW82504757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fec0846db85a187ad0a240f61911852552c3a4460332e9c4327c9d69995a6db. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEYW82504758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a50980cfd413eb42f811a4ed6fb7ea7ae8613cf25561132e317db97833d2641. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DEYW82505201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8568299bb722d1d8afe8cbe600f73ad518edbb13b3661c5f535a8010f9e13c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEYW82505333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878c36db84afc19e5c53bbc5e6e2566490fef7cd61c011599ac04461e474b2fd. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEYW82507605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9ba19f80ceadeabec33712aca0df73687c10c99adcec2e6379a2d46b73b7d4. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEYW82507680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761ca35bcf70505525191d06d99a90e59f65b7aae161323d8541936f89425d63. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEYW82508195.