thumb|upright=1.1|George Frideric Handel Flavio, re de' Longobardi ("Flavio, King of the Lombards", HWV 16) is an opera seria in three acts by George Frideric Handel. The Italian-language libretto was
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 0x44ada91bddd845ce21fec38eb9a0ee04df3e9a19c630e25d2120827afead6159. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f4b69e4-87e7-498d-8f69-f9e0485fa8b4.json and https://artists.proofprofile.net/proofs/artist/3f4b69e4-87e7-498d-8f69-f9e0485fa8b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Amour, soleil et Italie, vol. 3 (18 slows, rien que des slows)
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 0xafc9391cf9e7a4dace7e75be51fff102ced12e5b34eb68a361224cb691754a1e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FR6V80762915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2298dc92fb4804647c69e3a1c014ef16113cf97560153831a9404927b4e7235. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR6V80762922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd696b214576f87cc685c84d99360f3fe0fd2abd17c5b3c567df18b1e27d707f9. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/USA371104680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392707a672c2c4806482e85fab6a4c835c760d5a7ea02cae8e46d6637d6dcf1b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:17:50Z), 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/USA371104682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e6eb187e180af45c899ddad70994ad630950679c9338dd41d704d06767195e. 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/USA371104766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e9468a20ed0150b89233a950b5a6a4e499965d4ce74382ce8b8ec5e1dd0c52. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:51:26Z), 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/USA371104775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eb75a3779cb6506eb41e27a2b903d8d165daff7d7a0022698d9638cb593716. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:37:26Z), 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/USA371104777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c5564191de051b87819df0bcdb1d32ec6bae7cec9cd6a3a4eb740a38d9c439. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARF040400346.
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