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 0xe497781a6abad0b5114ef792ae64846070a861f75c3ae10aa922cb07f35f76f0. 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/07affac2-3fd4-425e-a61a-abd2f5ec9e39.json and https://artists.proofprofile.net/proofs/artist/07affac2-3fd4-425e-a61a-abd2f5ec9e39.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 0x2ae93fc229943361b2cf9b4d8cd2b3fb037a5023ccebec96c980f1a5e72b4205. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAES2097490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50703ae0bd2f78a7a68088ae07f43af16935fc4672608ebfc39cd56abdca2a8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAEX2005919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cda717eb524b88824e541ef90163308f80bbfa247bc801f4666be4881611a1. 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/TCAFD2004399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7955adf4a44a412190b7d78a6ed436edf49c2bc78fc1b10407a3be96c7e6e8e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:34:07Z), 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/TCAFD2004410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aac2d85e607c415c2c22959a0e715d36e8ce2fa10f87aff352850d981feb68d. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FIBAR2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd176f412775cf1efd688cc5ac5022153552f593689b9002f9690b754fbe997c. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FIBAR2200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299c3565c58a54589bece7f47ee00f07a015002fe041bc6e57551f893c75d1b7. 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/FIAJZ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23e6413a1a48cded4570deefe1ecb26d23121313ca2a24d717686679f77e164. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FIK4U2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcc0c45e01775a4addea6ba14fb3de4a3746a0afd7de5943488f0faf8689d56. 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/FIK3E2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a1e36fb5f04045e03a08f5ae1d45e6cc2c198d05d534e41c903621a01620c7. 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/FIK3E2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79f563dd6a0724822f7e9d7bc594c6dc3a3259ac1b8083abff90088a74f1762. 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/FIK3E2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112eef6fd1bacfca44ba56e61ecc41bc13010cedb2ad668ee7af5d05ad2dfbdf. 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/FIK3E2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74dff098bfda904cfbab8b5be15e32b547590e2ba71f90fd53080c1a524de39. 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/FIK3E2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870581a65d53ae5a75b5b08028c7bceecb9fb7f5e70e91d002d0190c2408f970. 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/FIK3E2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510292ba4a0d4c80de898a29a4a9aec2b2bce932f387338fe336e2b721a82477. 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/FIK3E2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bf8465e6966fa3e0d29d6630a23d929ea3e042d26c5f807ca27004a1ff340c. 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/FIK3E2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b60e1fd6ccc12102218e618665db50a6f0af9d7c554f9de3274ee166954c0ef. 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/FIK3E2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9581461703c34e6546427dd7063fbfda5cb8fd76d3d80ae62c86bbe3372353. 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/FIK3E2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc140ebf430dba01978666c89492e3dfd2e24c3921e4ef9dc4c1adbeb11389a94. 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/FIK3E2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000ceb44126e33b2007821ebb12ed7ce8dca8659405c198d3abe3d7e2d8431fd. 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/FIK3E2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1753d52b5b9225a01257138b0b59fd0f22dd7573994e9828cfd4392966aee2ce. 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/FIK3E2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe2690d9bc231129b9dbad10aea865c03fb362487e18cf1b95ff644acfe3488. 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/FIK3E2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc91c9ecf69cb45df3c1f1c8e2a816c96a64d5a9cb532dbc9273aab37295ce2. 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/FIK3E2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23bfea8d337a45f9800eee66c73712a71ebc2d47aab5081b4c0056f6b87a288. 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/FIWMA2300500.