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 0x250f85b50ba15a42422be0cd9be8d97485e1e921fe4fa20d81d1a5ff5d2db62e. 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/54902028-efcb-4dbc-8648-266709df2b14.json and https://artists.proofprofile.net/proofs/artist/54902028-efcb-4dbc-8648-266709df2b14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Donna libera (Contiene Credo, Festival di Sanremo 2015)
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 0xa8eeb778f0e9e0d9587d2e2117d4d6605b9d385078bc1a8c3bd30cec37963b26. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITAA81200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8657a6a6c2b27b642a623d5aec50c90036134db56248b5add06828bb29dfcedf. 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/ITAA81700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8868fcae0e3d143aa4a07e7488997f51458c96d9135f54fd06c6b8c8abdde7da. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITAA81700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9bf4de3c1f14d84a082fd5fdba8e0a61dbf5f1e68cba475167029dc4c3edef. 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/ITAA81700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf709725fe4e8ef1e4dadbb02e3e6ca6915c34276ceacd45fecbd34150906373d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ITAA81700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f2e2e2acb2ad3ca97dbfdc3e71da26b5c0adcec1824bea60f2d7792b18aa90. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITAA81700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9814242ea279ead6059d8f4f588045ded37db2c23a17bdbf1337de5ca5f7b96. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITAA81700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4b353f1c10623b9814ee9354f521688268444d5260a3235b732bd98f05e2c0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITAA81700008.