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 0xbe6a6f2bcc54201ce9aeee32ea955fca43448889973976c308713068194f22dd. 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/b79e5f44-e0dd-4b7f-9409-4c5b6fe42374.json and https://artists.proofprofile.net/proofs/artist/b79e5f44-e0dd-4b7f-9409-4c5b6fe42374.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beatrice di Tenda, Act I: No. 1. Introduczione "Se Più soffri" (Coro)
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 0xe308dfc9b1798bae707ee83bb0329e1cc1d7e507b0f24da8e31f09e911645247. 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/NLY331305841.
Beatrice di Tenda, Act I: No. 1. Introduczione "Ah! Non pensar che pieno" (Agnese, Filippo, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2243f444df4dc23896ce7ce8de3d51312177ab278d85e78ae74d2fc49bf0b77. 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/NLY331305842.
Beatrice di Tenda, Act I: No. 3. Scena, Coro e Cavatina "Oh! Mie fedeli" (Beatrice, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e74ee38ad42890fa7a82fd32919e79e2475695fb810c8e8aa14b08c729bef13. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLY331305850.
Beatrice di Tenda, Act I: No. 1. Introduczione "Tu, signor" (Coro, Filippo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff413289104d75e0efd731cf8d40368b067166326971c48bacfe28cd2d16985b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/NLY331305840.
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
Beatrice di Tenda, Act I: No. 1. Introduczione "Oh! Divina Agnese" (Filippo, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305b74c13d9d8ad285fe840943eb404fd68a03c8cbf3a72abdbb74247fb897ed. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLY331305844.
Beatrice di Tenda, Act I: No. 3. Scena, Coro e Cavatina "Come, ah Come ogni cosa" (Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7288c83384596d8c3e8a9585e13479197fc7d0d74bd7ad9575d4e5e68af701f9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLY331305849.
Beatrice di Tenda, Act I: No. 3. Scena, Coro e Cavatina "Ma la sola" (Beatrice, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134fa95e5fd8a05b9c48c664489ae8c52f42e9a3f51b0f4c6dc8ec39abe68872. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLY331305851.
Beatrice di Tenda, Act I: No. 3. Scena, Coro e Cavatina "Ah! La pena in lor piombò" (Beatrice, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ece332fc9a0eeb60177ae498d038ea15a9e05a3a3714aa4d6f07fe1ff13d5f3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLY331305852.