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 0x37aa93f54c667b6f4e83478923b21e10cf1742fdcb051466a3d4940c1dc58e59. 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/dd90d3b8-e81c-42f3-b3c7-57655e501d57.json and https://artists.proofprofile.net/proofs/artist/dd90d3b8-e81c-42f3-b3c7-57655e501d57.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 0x8bd320c3ecc40f247f5d13f4f995cf7cf5f4a549385487c0d4e59af4ca045e4e. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FR96X1992447.
Vivencias de un Tal Jaime: Los Mejores Éxitos de la Otra Cara de México
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb33575d27d1b3633911987d66ba0414f8dbc777997d9c1549f3596e5cd0310. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR96X1666556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaf0a7f47a2e31912b3af228ae612fb43764cd44d43ba2cdc15ba5d6b993c64. 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/FR96X1666559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79495c85401ac192d9e900450da4a82cf06ec0d07d3c6363c406cc1e1e07f69e. 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/FR96X1666561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a0629046c0335b47e217f1ee7931de463855b7aad2847d09750a2ecf5a1fc9. 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/FR2X41915842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379804e18f01b42c4dbe68189563f9e175ffc319d9677861c52e64a13ef3169d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FR2X41915844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ae316bd121175e1237f1acbb8f62a9382ad51a0fd3b8be256ce0354374f8ea. 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/FR2X41915846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63df01d5541b981d3d8359395e478f3fdb8188a569d6b50d1dedcbbdf37ebd6e. 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/FR6V82530752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222583eae6c0e85c62bef699787875c19ba864d053aaa1ffd7d01c451ee926ad. 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/FR6V82530222.
Rockopolis Presenta a la Otra Cara de México
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c247adab41e9231955f42995be4036a07b0f577db9fc0108e86c88c6f2b2c8e. 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/FRX871514829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdb64fb7d59c91ecbc9710a49257b6737cdd61b07d34ac9992a0f1345e880fb. 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/FR59R1466408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c37e0a976727ede9e33e9527c0b7b4dc3fe4b6e2efa1b5b9924360e591297d. 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/FRX871510757.