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 0x10f490314eac749574ef1bf191c63514d6cc027619f6fdec4b08b529f4179b5c. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0113d00c-6656-484b-96ab-5eeb3d42fd75.json and https://artists.proofprofile.net/proofs/artist/0113d00c-6656-484b-96ab-5eeb3d42fd75.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 0x5768b20758d80f051458837d4698dc9dcc7445de235396a34c9b02679549ebd4. 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/JPG102200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8219c34ef6eca63840b3c59f289b4a69b7852eeac10b44f705486c9930c44c09. 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/JPG102200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c65ac82d08d8ba769ef94b5290ec603022bb038172b6b1d8c7458086f69f52. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPB602087539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e18d00d2e130aec47cca35fb1a065d7f437836ab5ceab304158e5324e928c3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPG102200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c80d9ee292736f6a7f3928ddbeacb3438eeaf072f13a3d8a7d18fb57498a7da. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/JPG102200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb351807b9b4b3a7606d330c4223968570c39f59895c7784e67611975b82337d5. 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/JPG102200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa466225cd25b1367a4c58fe7b51c44b8214acd36cf989769116a7abade02009e. 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/JPG102101442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a91ad44ebfc94dfde77aea7d71e2287831f4b5ec5edd9669855745dd3a35e64. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPG102200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92ac58bb3edfe6f9c373a1e29fb655ca61bb2051906dd91194560169d841498. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPB602092374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18638f3e8fd2885d9c6e9d1515e627978b922b549b7b9fa038823e8032a84481. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPG102200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a534a28fffd5cc8984fcb73a834212408a8de6458c4d1b823c9783de8687b5. 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/JPB602082336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d09bbc1a887a97bce982d3dbdc09c4181c9a7fdfad9d850e474fdd289d5e07. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPG102301450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d09c02490443f3b67cd238cad1b4dcd70a3fe46849caa667bfc882ffac3915. 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/JPG102301165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4034d29dbc8780fa8c4738f3d4a4d5790f5ea2f383d1936260effd71e5c6ef49. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPG102300431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e56e49c645891c4ed4fcb072346dad64cfb59afc73c2b6ddaab5aa514d6009c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPG102201677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e18d00d2e130aec47cca35fb1a065d7f437836ab5ceab304158e5324e928c3. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/JPG102200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa466225cd25b1367a4c58fe7b51c44b8214acd36cf989769116a7abade02009e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPG102101442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92ac58bb3edfe6f9c373a1e29fb655ca61bb2051906dd91194560169d841498. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/JPB602092374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c65ac82d08d8ba769ef94b5290ec603022bb038172b6b1d8c7458086f69f52. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPB602087539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a534a28fffd5cc8984fcb73a834212408a8de6458c4d1b823c9783de8687b5. 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/JPB602082336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5968ad209936ba12bb2a31eb9b3369d3e1d69b6bc6d8d3eeac7eaf576f96f90f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPG102402195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ade117b2319d7a8ecce8fbf66317c7c27723b5aa70de8e8a59be55f5fd9fd25. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/JPG102401968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd46ac13b15e28b682a16f74862642d4ff38ca30412d08062c9090d2dd1374bf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPG102401518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb2431e3cd819212b6003d7b7361f5d0275249da587eb9e31187d88ac539d19. 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/JPG102402315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b1cbafcc7cf83a760c2bf4a6f00b6b07dd0835b67b9cf5abcaf68378b7c44. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPG102402316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ade117b2319d7a8ecce8fbf66317c7c27723b5aa70de8e8a59be55f5fd9fd25. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPG102401968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb60faffa4359d2522a318856d514327c446b08fb39b0df9e147bbf7dd13e43c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPG102401765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f9f5da62a805ed25d532b7529bd91f98992eb57d110ea5920e4d72cc71520c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPG102402317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b4197266f77fb74f0a7210320307ca0af7f8777495819535b846a7fe6bd202. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPG102402318.