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 0x6b5d656616e1eb6d912c95a525ade13e51009aee2813aaaaacb34255dcfa9985. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b067542-25e6-4118-9e95-25c0db3bbfbd.json and https://artists.proofprofile.net/proofs/artist/6b067542-25e6-4118-9e95-25c0db3bbfbd.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 0xe602a411fa44eb1d22e07e56a5a725b3498a8947c7b0cba5578ccb4f095bd93a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAGOO2436489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613f8ddb68dd75bd8be9472c14b9da58f3e2c69bb68c93f3aef84270a30efd45. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CBEYJ2456137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1a667351343bb83e317d4088a4253f8110998b4dba30ef9052f5e275f5279a. 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/CBF8B2460400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a2309206fad2912bd1990bf755cabec489ab4835b17555fb030a7fabfb100c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CBF8B2460905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6de965e46b3620e51207c6c0230f6230fca96ba5048ea23e0577d266f11f4b. 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/CACWV2568015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b619e035d923a5d373af13b6f6612d3e54aa8a93dd25e2596cf1c9fb0ba1158. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/CACWV2588139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcf5733d248933b017d8438cd0af9dddfd9932a92ca3c63c2a9840272696797. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CACWV2584535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802c305d58c7a0bf889d092010769e612b3312e8ff12f047308f128817d2cbf8. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/CACWV2584540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb68d6b2711fa7db80dcef94893c9a5b387823a14ba3ad43d4744c1a2a2b402. 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/CACWV2584534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed071567fce2461dc4e5a935d218345df60ef2c0a644a5ff5af055c8ff75619e. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/CACWV2584538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496691f411e69b2bbe5b4e67009c374bac5b0786466f73e83767887fdf673485. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/CACWV2584531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa501b157216116451e9b8257e82acdaee083aebf311f62c94cfc85f4c35a7e6. 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/CACWV2584533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740f5e3ac56b9d7f4517e8feab7dafe11d84a2bc796d594135def5c90e22aed9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CACWV2584536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aecbf73d907a1db0b9dbf2547a30be2978dbc23d833689729572870be5b7e9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CACWV2584532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcf5733d248933b017d8438cd0af9dddfd9932a92ca3c63c2a9840272696797. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CACWV2584535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f5350712235033bb51d09ced06265b9487a8148de37dd86f4b797aa81ad8a6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CACWV2584537.