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 0x50243daa202d9f5f19a6f87e18ee1e619d420184462274e11218e737cf12ac93. 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/d2ec9f2a-444c-4c60-bcf6-b9585d8479ee.json and https://artists.proofprofile.net/proofs/artist/d2ec9f2a-444c-4c60-bcf6-b9585d8479ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Stockholm Boys' Choir - Roland Nilsson
Goder afton i denna sal (Arr. Jan-Åke Hillerud)
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 0x883a5ef6cb282b166ae16563dca0f01850d2e8a908659a1f169acede70f38247. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/SE2351100113.
Lyckans minut - Sånger genom livets olika skeden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f90db3dca4f3665dbbe0c485e39064a823f5adda780fd8654ec462e7efa569. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE2351800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f0b2e196bde3f3626ba2f4103ec44a41ec28c94e7aa710e13ad5cfcb571f71. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE2351800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a58d60db25a5a63d8599c4fce36ecb7fc7b835daa5056d00adc9b3279018c64. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:07Z), 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/SE2351800112.
Jenkins: O Salutaris Hostia & Sköld: O be joyful in the Lord