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 0xecb3e1a92feb8273e57bae730d7756f648d4208c4f0e221224787a5c2ce85fa1. 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/6a47b3e3-c076-493f-aa60-966a66ddc260.json and https://artists.proofprofile.net/proofs/artist/6a47b3e3-c076-493f-aa60-966a66ddc260.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 0x12858486581e698d80b01ad3b3fef2dc630ee3a8f1aff9206dab46d17ddc10ed. 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/USA2P2010655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23002d0d787e6085719c634001b5b6c8a993c5164dba55b92b8f2186657917db. Chain 2 (Bitcoin): anchored in block 957728 (2026-07-12T16:20:40Z), 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/USA2P2010656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7faee32ad45c1764a37db770a75057d44ae625f28e0ec56bee41d4f75f4d545. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/USA2P2010657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315efb90a4291beb334de147748a0cf1a566c4ead0f68a2b03f03c99847d7a88. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USA2P2010660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f8120786c7054e5944b564ded6d238eef9683c863e2c98ecee54cf6baaa042. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USA2P2010661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cc2eb0c22a29ff982570f5b10afe94548a5ccde78305599292084408a1f96f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZMEV2262922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4763efe3bf905c2b179f5dbe664624143aa9f9a1492305576e82b95ad16ed0f. 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/QZMEV2262923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2991fa5077de92bb0f041632762c180f7109c97bed500fd56b6bf4bdc26c9a2d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZMEV2262924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e1faa0da9c8e6006dda869db68321da0d0157f73a6b85103e65d7c223fb5a6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMEV2262926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40718a534ef3bd7d2f54cf6fd5a265ae3deff438cff39ce3c3d2e9c6b8acbd9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMEV2262928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6aa73f0709dfb080b93b49241e53a568f1297b0769cbdc5e07579bbe777c75f. 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/QZMEV2262929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa06863a2aba25adfc59a0db9a343e83058c0fb09db49bfd6b6ce4086ab2cd0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZMHN2462565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf167bb1949181b16694337cfd63e93923cf39084ca26c6a8aa34c579ec762669. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMHK2459644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598f055b5bc23d095801c05c8d1dc4d790f1818b499d7a25f7e7393eeedeb439. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM42K2407894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7499b1dc550857454a4a8fcf929166b3af9c8a20cbf8f9473d2124c1da420e54. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM42K2471944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1d85a4cb391d0b52e8b5e5dff77e518a4a2b97ff0e3218f433fc5d26075bc1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMHN2478876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc073269484af2c13f81db6ac461536ab09acf970557eef34d045e02e47156cbd. 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/QZARB1856656.