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 0x9482b15b26747f67b5548540ce952eb251f80f061a21bf8fd4aa5e209997ea57. 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/3412faf8-bc42-4c7e-8f1b-b023da200088.json and https://artists.proofprofile.net/proofs/artist/3412faf8-bc42-4c7e-8f1b-b023da200088.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 0x392ea331898b255824711e25a0cabebf606f2b6ecc397a919a16b1a4e32814ff. 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/USA2P2312345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8291cdb46fdf35c2a642ce3daa0874d261be3664b3d44862d398c334582299cd. 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/QMDA72326996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670d1d63b8a42f81fccb8d14253fe4f5e0cc2b7211522c708322fd63d59cb68e. 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/ES64E2307818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ee9bdffb7e9343ab9efa0e6a7a4a0a11e1e5a35b46e1b132ecf7b855f01b6e. 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/ES75E2400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa451d403dfaa673562294ccb60b1fc1422145178f7267fcd0a4f1b32296b2884. 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/QMFMG2357878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdf893ab506be61d62d8ea5039fe2dd0a0c35d91abbac6550a22c98221a4a5f. 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/QMFME2394206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b95a8a0c3a4ef4335452621c24e404bc95c7bcfdfbb589e1511535faa1bb9ce. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMBZ92343074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e347a8e8be486320e48b0e498044b29b826cda2efd5e41d070f394b4bf7fb5e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM7282338522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71d1b076ec57f53bdc283c769a2b37d71896fa321c3ba3fe0f3fa31fa48292a. 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/QM6P42323758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e9ce311339ab438ce93617bd3764d51b243ad9f08c7fcac70360e3dfc1057b. 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/QZDA62507649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53ea526ff79a380fa8a92ca12518c87447b3b7373ec08f223b3ea0ba30694d9. 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/BK4DA2501698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c116f8deee62dfcb1fb18be18434515376c8f4713e3b7b5f4f84c05b3c91bed. 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/US7VG2506586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9076da88a261ab2bce0c427f85d97a22085ab5502f04eaa83f8ab38e6158f6c3. 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/ES64E2419317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35de484e27f1e9263358efef53bfb85506f70e2b8e72981c8fb72c3c5407af0c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2473901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6abc059f36c7054cbf1210225798f03c4fe724907e6f818ac60e77a40a0ced. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2473904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e793d60699270117b51a7e388c671b3d53826f659e75c46b9c3be767947284c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2462856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fe6dc6edb5b7095a46b62dd50e6f36111cccf777696731b85e39d96cc36973. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2455555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ec655b56cbe5c98c16a73404732eab97db76837cd66d80749c6d884148c3e5. 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/BK4DA2453987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae8392ecc0e37b2446b4971220d8122a32cf631392e773ee4faee54be2a767d. 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/QMDA62484786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d96bb56213cf8ac5be8f38033b9ee3edb97555c06b7582abe7c788e41659e8c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES64E2499796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a5cf37ce0f77e5c4d945d7629706f19b68e8ca48e57bc0f3449405de774aa5. 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/BK4DA2441681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a797c6b5d6dc346865cb0c5ea72705fa4bc99c4f0b3d0df8619dbfe24df944d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2441082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73a2b62d2fa476e9eee39f3c94e2c7403f1c96f490587cf47240f18f457523c. 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/QZGLS2450971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e102f82f3424761832730cc1f04b12de312bd0ac69698a8bea4c6f69d16ff4b. 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/QZW9L2350585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c9d6f2e75c5746a19c26b73e5515b3c581bf4476e88caf14532630d73c5617. 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/QMFMG2303626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e839b4f9ddba05605e4f0fd1193ba55f52b48fb446ad9b89d3a4305a140584. 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/QMFME2339247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d96bb56213cf8ac5be8f38033b9ee3edb97555c06b7582abe7c788e41659e8c. 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/ES64E2499796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d362228e2c1c3101a6e1688ebf0023dea3ab6cdd9f6a63274f1ca061771096. 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/QMBZ92327135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ae53112a44465cdf8738715ecaf28901a11e9e3fe10b9d6f418666858e74d9. 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/ES64E2305538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a39b721cfd115a5e4af2283420be6d90c2f53274ba884dee9ec4652db93720. 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/QZTAY2367702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5adaf8aa8f61998f1ebae692646f578e4cfb61c59cd893678dc2bc9fd17056. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2205357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a39b721cfd115a5e4af2283420be6d90c2f53274ba884dee9ec4652db93720. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/QZTAY2367702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699373643d0a01091738fa774979ce2ad63ebea91dcb747c611450f010475259. 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/QM4TW2347372.