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 0x2c5224a3e4fe5d9fac3080627d5386c066dddb9e4a61fd1caba07b8bcc8aebb8. 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/f48d13f6-0111-4b2c-b6cd-b2bce448bfa6.json and https://artists.proofprofile.net/proofs/artist/f48d13f6-0111-4b2c-b6cd-b2bce448bfa6.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 0x303d798fd517a683a218463a1d7e80aaf8b3da1d02051168b2a342352ed2c34f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:09:59Z), 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/CH6542181335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421b03022d6516c5617da3e0ae2d99f5c86acb6a03d721bc6180e23f85f343b7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRDKW2315910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e61aee64e7f554c0c638930558a7484ed23385a7aaa3adbf9801caa38b45b0b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRDKW2316052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f965f406b98dd2d3efdef89137bfc48082cde89ef72264d109b07c5f970b48. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:57Z), 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/FRDKW2316057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe398db599d18d7c64712afe92d1a523a6ab168c9cfdbbb40f3a923e213f7df15. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRDKW2316058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4210b12769cbdfde6baec585ff84f1357b2456bed42d39a1860a7b86564cde. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRDKW2316061.