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 0x3ac55ebb7db5cd311bfb6247129be31d3ca3bee9e33321fb84f1c60b52711b90. 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/9d17d76b-9a48-4b55-b3f0-c72dde4c2376.json and https://artists.proofprofile.net/proofs/artist/9d17d76b-9a48-4b55-b3f0-c72dde4c2376.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 0x2db7a8732aaa0527d7aef443f10271e2bbf1a6a911a68bcbdb8a697482e82276. 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/SE5752420391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390bc70cf88f8311937ac4b40c2364e2566c9eecedd5eb130c8409fbe083cd51. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE6I32427098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6c3ae0ef3b5c8210132288ef2956616b787916cf91fbe1da8e4ee41f2b5f26. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SE6I32427099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e9c20c37df5c04e86c96d10703a25aaee391f1d18a437cdca8368235e88f7f. 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/SE6I32466600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51798480c8701306d77069d86d39f95feef3f401dc2b6926da887b077cf7f61a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE6QE2441601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ceffba2adea4a1f2439747b8e97cd638013b3c211eb86089f81259a3bdf19a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:36Z), 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/SE6QE2486276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2200bf49b4d57a35e555e903d2d8c1cf9f72af46ac22daf6678f9d0257ce988. 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/SE6SA2466439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e39c4611af82aefb965610db09375c1c13344044ff7ec9cb4531758c0e1cc6e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/SE6SA2480078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b51905b5a4672cadec9710099bf6aaaf30e5721b1a0c741c18bda39ad73a12. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/SE6SA2486679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46aa219456968d6b37700332e5b0226641bcecaa6ba7b0f7a0dc40b105f9894. 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/SE6SA2486681.