thumb|Mary's Danish (1991) Mary's Danish was an alternative rock band that was formed in Los Angeles, California in the late 1980s which released four albums, with the last in 1992. Mary's Danish bl
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 0x8c672f8316decf3872d276bd6eb756ca0c44d786d1f9bfe0571bfb65981830a0. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7db0c23-7ae3-460b-b246-98cdc0ea2216.json and https://artists.proofprofile.net/proofs/artist/f7db0c23-7ae3-460b-b246-98cdc0ea2216.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 0xca68dd4b3477513c3f6ebfbc5f4971dd8095635e7a3d1ddbf7e95d6b4557e8d8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:09:59Z), 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/USEE12200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb9c57035fbd8ebecd2fdfc81016b87a46b755353673e9cd99bf01fa02d5b43. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:44:10Z), 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/USEE12200203.