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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aab6cdbcf765adc485247bdd888dd653899abf82793467414db932a4f72c26e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/add246d0-b5cc-49dd-a942-cbfa1b8c8f89.json and https://artists.proofprofile.net/proofs/artist/add246d0-b5cc-49dd-a942-cbfa1b8c8f89.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1976f339fa033c0a165126fb64dcee854ba68d3d210689a643d4664949d4d50. 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/USA2P2229744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63ea4c7883163844c0e53d8e81a30d198eeb19324fe1fccffe01fe1dc5e9b73. 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/AUGBT2233747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72126154f50bc638bc9aaafc3197eef0cd979c5b714e819dffb22eb7420613ae. 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/USA2P2214391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a50e0a661cf66728fd9aa93240ad5a3f5db914a5fa76000de093402370f050. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2224679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0e8af11dbf9d264a480374f5f1ffd0ffc29cad211af92b30790e5a505f575c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2224681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc146d80a64d3a43c41575d54eaf50e47e50c0835747761e9e6244c9de8761ced. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA2P2225115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9220d7c60c4a9fc02a01ffa4a9576afa04c224879f24c8b45b1aa7e6303aadfc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:48:56Z), 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/USA2P2224680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72126154f50bc638bc9aaafc3197eef0cd979c5b714e819dffb22eb7420613ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2214391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba1b5a379e91a7fdc4ae5942e187d2f5174dc30b6973341b27121494f7cfd29. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USA2P2126214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fa337ccbc7c1a60cc26518306e793c4b5b0d951b4957bbcb5905bde9968e1d. 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/USA2P2121315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919e60a66af759c2920ecb72b235c8c840508e7b6a596c196fa0f58d693e5238. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2106928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f32f74a91106f8f3fb49b34b5b41e3c8c9d3a25779460410ef0471a79d43ae. 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/USA2P2124412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489fc902182dc92f208288cdf76c73feb4f3218a7718f891fc577cba7c75e624. 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/USA2P2205293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2695058f74a4c0c19aa53d14fb3267a297c4cc14f69a949037edb4f1444de. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USA2P2231763.