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 0xdd07ff0abb6f6a657eb02b9aad287719645305e1cbdcaccff057481d829d7571. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d4faa9e-6a7f-46a1-be39-c1153d2808f8.json and https://artists.proofprofile.net/proofs/artist/2d4faa9e-6a7f-46a1-be39-c1153d2808f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dansk Pigtråd / Lollipops - The complete 1963 - 1966 (Disk 2)
Dansk Pigtråd / Lollipops - The complete 1963 - 1966 (Disk 1)
Dansk Pigtråd vol.5 / Lollipops - The Complete 1966 - 1971 (Disk 1)
Dansk Pigtråd / Lollipops - The complete 1966 - 1971 (Disk 2)
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 0x2a71b51e9d4a2a698a43bec992e80b2c74732b464ecedf1c81b0563cb509c5ef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FIFMF1227018.
Harbour Boat Trips Vol. 02 Copenhagen by Trentemøller - the Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2881890e43b8646b1d8438f2b00a7337efd702d26b50d07ab44e3c3f50e826a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEAZG6601050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c5460d5d995ac921a1f96fe485d0fd153a2f1bd8b9e8b53ec27915c972baef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKBKA0400693.