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 0xa502df04f3a159953cb1bac240959b3f385338e129f6d12539a50e3f49be552d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5e24c6c-3ebe-49c7-ab4c-1bc040a4a585.json and https://artists.proofprofile.net/proofs/artist/f5e24c6c-3ebe-49c7-ab4c-1bc040a4a585.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 0xa5f508f3c19b0701ea7fedd50e31a8dc03f6b4e4898e53cbb2193314c45f6ec8. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T20:58:44Z), 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/QZHZ31946135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c816d86de622b6259da6de0786ba282b6839c3624181a1aaf4680ada57c4178. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:47:45Z), 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/BC5KC2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc084a9020bdec354f45ac248db3f3f52387d89fd8111b8beaf5db06a6f3e494d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:55:34Z), 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/BCYHH2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b52ae5e0ee17124e7b2ae9e5da55350443482f3870f23a7e28534f9b4818e6b. 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/BC5KC2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f87eb808a819ce55512a744261c7c27ad897ded8cec97cf696e5d97c1d513c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCI5I2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a774a6b52f60e770ec3ae1dbaa1e493364daff999c6899d5d186e52e033f6f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXIED2200160.