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 0x43cfaef84a3075eb58c25110ab5dac298588df4d2f3275a053617fda985f13d2. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e31adcdc-5e01-455d-af17-289248ca6c04.json and https://artists.proofprofile.net/proofs/artist/e31adcdc-5e01-455d-af17-289248ca6c04.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 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 0x1592b42c619e2f6b23668b8505d6c934ed3f852148c4055f69424b6a24d86e66. 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/DELC31705010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aeb2b5c5e9864d94469b82d3a4f62d436e29c89486e6d643d62889bf8a6090e. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/BER182177201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67613dafd8e7500e46fe0ae162616485a0ab01fed10b7e67500874017f97f291. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BER182177202.
Les Roses XVII by Arianna Savall and Petter Udland Johansen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438c486b9e1fb83b7347e4774eb621c81f7a438d21e9142a1f9b2f336b9212f7. 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/BER182177203.
Ophelia's Song (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e687061457fde56b7f34417f80aad9b51f173f4e1d029e12acc9612ad73a06. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BER182177204.
Pamietam ciche, jasne, złote dnie… (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd132da51ce1426a65c94d891076e32e80f40072d5fc2715e092c269e6f204a6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BER182177205.
Polish Songs, Op. 74: Życyenie (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5a97e3ebc00792e53d01d77f8715db8ddb28e061e031353075ee20d2282c87. 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/BER182177206.
4 Duets, Op. 78: I. Tanzlied (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7430e7f1d96a2e29dad81951899903ef520c2655e948b9a69f0c282307bdd43. 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/BER182177207.
4 Duets, Op. 78: III. Ich denke dein (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b11428ae7ab57ff2fbdf68f8c588987867b226f50c78376f0c696ce91caba5c. 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/BER182177208.
12 Songs, Op. 33: V. Langs ei å (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcb301c0d1595b34c254072cb1b59dad674555508cd8e6f7805900d7580d89e. 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/BER182177209.
Peer Gynt, Op. 23: Solveigs sang (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858b080bbb47581a4a01b6a254cb103f6163ebc485cfa33503e68f2a38604627. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BER182177210.
5 Songs, Op. 70: III. Lys nat (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41febd8fcedf435b7499fc82fcefe8a196180b37ef0dcbedbd287c4211350d1. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BER182177211.
12 Songs, Op. 33: XII. Fyremål (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991bde5278878b22e0b1c49447c2d12324f1fb8f13020926673f845f9891ab33. 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/BER182177212.
Damunt de tu (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4460c494ecfee16175ac382b5bc620fe18df004db606773c2aaf853f92ffdc65. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BER182177213.
4 Lieder, Op. 27: IV. Morgen! (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee7c5e32889ef18d4d9a2353b77e25a90797084ced9955fbe3fe8f99b299731. 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/BER182177218.
Die Nacht, D.deest (Arr. for Plucked String Instruments and Double Bass by Arianna Savall and Petter Udland Johansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec370f76bde9d2d944e02f3277b8001cc6556c2ffd6e90e74b31979608766ac6. 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/BER182177219.