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 0xa28c2dbd3913a44cb692d8710a7708c6f1a0e13f8078a828f774258c1d9f96c6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6336aa1c-7975-4991-9f75-ea6a32bc6cf5.json and https://artists.proofprofile.net/proofs/artist/6336aa1c-7975-4991-9f75-ea6a32bc6cf5.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 0x34ed58236d235aeeeda1239fcad2013efd3990db86ccbcdd80478867e75f86ce. 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/FR6V82605505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a5e07efd36f0102f36c4d84af5d8b2955007957c5e8e2b7f94f23623224f7d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR6V81210666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e6e8319d1eb84bce25f5302314e79cf346640ef4e1237e3887915199e5fe18. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FR6V81210670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b01cad584d55c9389f14c953540505cf326b28cc76d4ad76bac2fa0b2195228. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR6V81210674.
La patata... (Molto più...di un semplice contorno.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ee5dbd537eb4c8d46d73897f882a53b710121e377e87241d79a50716f1c39a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V80190562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266667e924b1f6f8a21425918af4050b45435094a415b2004e04877ceb646c9b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V80190564.
'O ballo d''o cavallo (Versione originale inserita nel film ''Benvenuti al Sud'')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef0703675ee9e59c04a490875b9e4f96dd94637c1d1a85f80ee61fcfaec0d1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR6V81724255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc0d206fbfd442514fe906ecc9b8cce622aec4078abd3cd4fb5792607a3ee26. 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/FR6V81724263.
L'acqua è poca, la papera non galleggia (Politici, ministri e deputati)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd4e8924574079da7f41157225372055ce89d938a65ffc0b8f5a9a9eeb63696. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR2X41536108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559a91a81ea272579dd3fe5a63527cf63a4cc17bb60951e13ec0f79ec50ffdb7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IT8TZ1880802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d802c388ac2b02b8f6cc687e56eb1bc241c8826d572796ad11063970d696d53. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR59R2319661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaead7c1c2d800391041a19baf99e8a75c93d012739b3fea80aed072d2b41356a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZK6H2456173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be53793ae9f68209133b8218ba5d9d8e29573ac640f7e627b88a970b6f4fe12. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:04:25Z), 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/QZDA82595947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a476f4e79aaca60679d3d5e1ac9ff250bbe375ec44266fa994add94cb8e9c7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBD2551601.