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 0x6a1109fd3d948b15ba8711116e33aefe3a604b7230399cdc281ed3c0663c87d1. 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/dcd9e34a-b774-4e39-99a1-c433bfaf005c.json and https://artists.proofprofile.net/proofs/artist/dcd9e34a-b774-4e39-99a1-c433bfaf005c.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 0xe62b36669463e29d329a93a426ef4c6f3b1f9405f702a24761b2051249ae9c0d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BCFT52100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ae1c0236f4d759f06fe4bfba7fd7e928d1663e2ede625e03746d50a3064142. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/BCFT52100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09299365b78c0fa104b45ae160a98ba6042687acf728d80ea76bc5f2c5fcef88. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:49:10Z), 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/BCFT52100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5f9a579808d84b140ddae0b5be3bccba335dfde0f619a758443176012e0f34. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:22:43Z), 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/BCFT52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a47da4350ab7fe96796d45b28dc9172056df632869565ac7118064049bcf1. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/BCFT52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fd74c4ba4a4ac488564969025d1a12168ea0058ce749976df302bc9dc03e71. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:22:24Z), 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/BCFT52200003.