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 0x59c6d874e88f4761bcecc27ad55fdb2dc4fca7b86994092810b743cf15724dff. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4b03aaf-8205-4ad7-bb2b-56a5424513e1.json and https://artists.proofprofile.net/proofs/artist/d4b03aaf-8205-4ad7-bb2b-56a5424513e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jul i Den Gamle By (Christmas in the Old Town)
Dejlig er jorden (arr. O. Faurschou for chorus)
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 0x68824f9919943fa46a54b87df518b3d7ff641559b9e5d9486496cd68ada08395. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI191254701.
En rose sa jeg skyde (Es ist ein Ros' entsprungen) (arr. M. Praetorius)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da28e9aabbe237f79b45575b769de08a177587938cccc3308b5f50509758f6f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI191254704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde09c035987d66d5ccb565c439c1ff3c728c64ac38cc6e9630b13da135caea88. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI191254709.
Den yndigste rose er funden (arr. O. Faurschou for chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a32d7c42bc8287d1837583359b276ffd08f8343effe7e1a6ba16d22b596ea5b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI191254718.
Sensommervise (Arr. O. Faurschou for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92cfd7cba68b2682db1d31de7571f19ecfddd70060df73c0f7d128092003771. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DKBW51800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef062545359216b3a1382a9942ca5238a77b0311ec192ba8d5f3e04030c9e8fc. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DKBW51800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eebf5ebe6cb4186b77b6cf3304cf0f012471fa67d657e4116990233cd5702e5. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:37:27Z), 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/DKBW51800205.