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 0xf36f4d01832d0db70c42bcd44cad650871dae6fb49c9e76701b5870494633513. 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/4459c497-1c8d-40c0-8a7e-f548ba55a361.json and https://artists.proofprofile.net/proofs/artist/4459c497-1c8d-40c0-8a7e-f548ba55a361.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 0xd1d881e9796f9e12d62dd5b388c1599c27934449ed6f109bb019c7f2f00b8eba. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:22:46Z), 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/QZTAU2402517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb1df704f3aec26d259328b5d56dc38630f5b37b5407ffa9f213ba2d8038e95. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZTAU2402518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d14a9529e6c79bf98c489c8cb295e3db64dcb1ccff19838b8188a0afdde8b0d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZTAU2402519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6152061a1aa816097c161b73e5f8c04686f83d1f1d8e0990c5062a8277ac70. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTAU2402520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1db4feeffec8c2681d84b0e7b87604b39df327bdabfea099cca93da8a18997. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAU2402521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58c567032bd2c549ce20feb3edda1bfc0ba559f121dd5570be7f92adad306a0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:39Z), 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/QZTAU2402522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d8daa8060977c006d13c205ec05b49f20227dd0d2312286bbc982e43171bd4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAU2402523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a5daa079f3c8fa0b0472ae1f8be9937fb775537ce1dc977fcbf0f127b2b34b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTAU2402525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa9c174238f6930738d2210ba459ed599c45c6fa8f5bf064c0ce03a17868023. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:25Z), 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/QZTAU2402526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453c3ff2a71627beca8c8908ef4f8bcd77010325aa32e89e6ced4119c18e2c3a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAU2402527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc0a61f042675c037f608ae4da01d7174aa9eb2991b12a435042a9c6ed23122. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:19:37Z), 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/QZTAU2402529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595fb55b8262cf3598a1f0db121cf7484392c1ca266a6a54fdb9a44f32836609. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWFM2414814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5de908d4c46c76889bc8f2457eaf348760e0931188e674e0a1338f3a592ec4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ772492344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6d9d91c3100118fc71686c454e55db90a2d61dc73cfcb36e06cd1fe183ed48. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6F2551670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91438b99be788f4daf5e635af50e16935f45e25d141fbea9203f1d2c757fa374. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBD2530111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491904e89236654e88f4b01b4a591b17acc0628a999f5013ce33d6ede1caf1cf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3FB2542430.