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 0x4f3a8868e74ba3000a368669ee9eff72dc06b773a742909517746cf7ce4cad31. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70e77e05-b26a-4c99-a8db-2d1e7fc4aa2f.json and https://artists.proofprofile.net/proofs/artist/70e77e05-b26a-4c99-a8db-2d1e7fc4aa2f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
The Best of Piero Piccioni - The Greatest Hits, Vol. 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 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 0x8fb2821b540184471fa1fb91565fca9c494d3367f3acbd26cef5f04b41a9867c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD061002218 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79313106da9784f860e075124041ec41623ef25174a0191c0e368f920bdd21b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK9JG1800008 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d638bc700700403e80af9a2786596074b3d6e3316eb228da9eca0bbe9581df. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK9JG2400376 — a six-check JSON result.
When A Love Affair Is Through - From "Il mondo di notte N. 2" Soundtrack / Remastered 2022
Femmes Fatales – A Female Vocal Cinematic Promenade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f10bb04bcd923c1df914162edb150652cfdd19768db9a6a27bf700e985b205b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC002200110 — a six-check JSON result.
Reno (When A Love Affair Is Through) - From "Il mondo di notte N. 2" / Remastered 2022
Christmas In Italy: Beautiful fireplace music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f27557b55a0041495eff5ffe7a463fc1aa1101227ef470f024c20ae3351a0e2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC002200107 — a six-check JSON result.
Reno (When A Love Affair Is Through) - Remastered 2022
Il mondo di notte N. 2 (Original Motion Picture Soundtrack / Remastered 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f27557b55a0041495eff5ffe7a463fc1aa1101227ef470f024c20ae3351a0e2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC002200107 — a six-check JSON result.
When A Love Affair Is Through - Remastered 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b12b505aa902c1b31ef659c3580c6caf7e5107dc0661c0ee66ed702c47f259f. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC002200111 — a six-check JSON result.
Fumo di Londra (Original Motion Picture Soundtrack) [Deluxe Edition]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2307a1801e6b962736b71bba8bc75a6982083974f3a2d53beadc49da225ef. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD061002180 — a six-check JSON result.
Volubile (Original Motion Picture Soundtrack) [2021 Remastered Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b67dbc64c3f3fb474c23adf04750894565d7af6ded58bf84ac0cc8166a39d19. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK9JG2100032 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f66755ca6707344a8dc74918286fbed776f0e79ba43c94dca0597178fd15ae. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK9JG2100037 — a six-check JSON result.