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 0x2b0089e97595c468ed343a0ec7a6927b4ea428ffa9013e25b1f2acd342c8eb69. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d329020-641f-4c60-be82-0d66f0d137bb.json and https://artists.proofprofile.net/proofs/artist/8d329020-641f-4c60-be82-0d66f0d137bb.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 0x0245be472e994646bfc1635f3293272a562aa20e16d2f873703d69a5a2822a24. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGH2414886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8373f8ea6f255d8eaad19bf4f7e5f8eed9a63fd012f7f83ed6056f1b87abfa96. 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/USCGH2414887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f19a14a92149bbd2e049a1c912a54bdcbe27e2ec0562ed070bce1fd1cf0eec. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:35:45Z), 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/USCGH2414889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba54a619c66ee388c2af5a2843746064e2744b9df87d8897f1ea1026742cfd7d. 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/USCGH2414890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a32adbc18151245a7376dfdb8db8d9c746d7f8ebca1a4145e39e48f420b30c2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:41:31Z), 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/USHM22460426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70f4346b5eceea4c04e6a28a691728c16a76e318d00c65be4ae9e52b1971d9c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:34:17Z), 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/QZWV32448449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbd6cac59733fb7ac3c73294851dd1c5a34b006d4de226edacb14644a20f98b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USL4R2473715.