The BIT20 Ensemble is a contemporary music ensemble from Bergen, Norway, founded in 1989. It was formed in the merger of the quartet, Bit4, and Ensemble 20. The ensemble has headquarters at Grieghall
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5965ec4a0b6c88ad8db91a1521cf67b7ceca0049ec6aba4171f8b9ead33946b. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc35e908-f763-4675-8a32-05b909043aef.json and https://artists.proofprofile.net/proofs/artist/cc35e908-f763-4675-8a32-05b909043aef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vinko Globokar: Les Soliloques Décortiqués
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3fa413b0fe9c17bdf6c7e4e5a49e1205cb7c348eef4ab3afbee935711c3eb9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SEAEX1609010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb6df9a4b4c665b8051adc21a829f4ff6eb03de1c175d338589d9e8b58c8986. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/SEAEX1609020.
Chamber Concerto: I. Corrente (Fließend)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3939baa5c1a2c32696a0473558272c093ad6511efc0857dd2f9a1155b4f7c721. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEAEX1609030.
Piano Concerto: I. Vivace molto ritmico e preciso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729785ac351452a39df55f3ba76858d6f89dc9d1dafb268cdca116d7ad95d653. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SEAEX1609080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fca6056166f842c7049e17c16dfbde837b9646653db677a471f4b71cd821a2c. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/SEAEX1609090.