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 0xc148e3db9f5eb0df6ee85b18b6db3a4ae327919591c78ba5d047186395d207c6. 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/8bad743e-7c7b-4e99-9074-afb0543a0c45.json and https://artists.proofprofile.net/proofs/artist/8bad743e-7c7b-4e99-9074-afb0543a0c45.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 0xced0314b5080496e153d4eb36fc9e822afe9990a92157d9a54f288dcf5cbfb12. 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/TR0330605281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a43f6bae0acb8aabef5741d70739908e7579d999344fef7662d6679fbd76aa6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR0330605280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0182ca2d4c99471e2c0d36a938dbd7c2c03e1758321fec73e28b13585623fb94. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:06:55Z), 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/TR0330605279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbeafb433792b505d85ddf9efc2e0860f70571872b386b2242a5f182c645586. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TR0330605277.
Antik Bir Hüzün - Judeo-Espanyol Ezgiler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb310c8b16a629e8e6157147ed1d997b5a32f6581d3efc1b6aaa7d07ee55d61bc. 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/TR0330605086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f90b29aaf85f0c2a65b6a478362d04b081a2e8f8af86baed02e5509d43f6902. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:50Z), 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/TR0330605081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de9629018bff55272cf468c74bd0c124fba6d01fdff6ab9249d5c1097e62b77. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:28Z), 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/TR0330605097.