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 0x8c08db9470c2c2c6af094004e8a29082264bd0c2b504f83db906b004ea9540a2. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfc590c5-1d72-4256-b8ba-f3f0640c0bcb.json and https://artists.proofprofile.net/proofs/artist/dfc590c5-1d72-4256-b8ba-f3f0640c0bcb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tosca / Act 1: "Tre sbirri... Una carozza... Presto" - Te Deum
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 0x975e55ced3d443f505540b2b783b053707c927232c58f670610582e51d5dcd7c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:37:34Z), 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/NLA508906214.
Tosca / Act 2: "Meno male!" - "Egli è là"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28025a139eb407f87fca03628035dc6cc3ea7b5dd54c14cd441ffcb0acd8c251. 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/NLA508906217.
Pagliacci / Act 1: "Son qua! Ritornano" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad1cd74ed139ca898fa35c015aca8201f9008d38838a714f0c5644aaf216bd0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLA509109903.
Pagliacci / Act 1: "Un grande spettacolo!" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b1e25c1f9d7487fc3422efaf55aa838f3aa1ded02613d27e1f901ac49d0053. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLA509109904.
Pagliacci / Act 1: "I zampognari!" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d8d592635d04de33a3b72c20d1a4f98b5ef5097d5fa49dde22034727e4eabd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:32:42Z), 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/NLA509109906.
Pagliacci / Act 1: "Don, din, don - suona vespero" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c5dd3d7e425cf60cc5234b393d280e1fe820e643eee1d3b5618667c87c6b1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLA509109907.
Pagliacci / Act 2: "No, Pagliaccio non son" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005bd580dfbe47552e8f4a435448849fcd38eccabfa3fd90731e78e183f3bda2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLA509109924.
Tosca / Act 1: "Sommo giubilo, Eccelenza!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba90d4326aab4edbe27b4c881898771917357fe3000e2f1b8b22e9890c3c345e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLA508906210.
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 0xa9429ed00f0b828239762224016823a067cca987d435b2f463e42803233b1edc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLA508906240.
Pagliacci / Act 1: "Un tal gioco, credetemi" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aedd3fcc5a88efd201e4bf42821bdc9e70e1b8f860b23d0ac2cd7fbadc918cf. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLA509109905.
Pagliacci / Act 2: "Presto, affrettiamoci" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe416db8852fed38c9cde15b379364cec3ca141d7023677f8c7fe18877a342613. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLA509109918.
Pagliacci / Act 2: "Suvvia, cosi terrible" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41731ac194f58a2313dcd0cab7aef3fab7a125d85c9b0376c19a18e76c27699d. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NLA509109925.