Rondine is the Italian word for swallow (a type of bird). It can refer to: La rondine, an opera by Puccini Rondine (Arezzo), a hamlet in Arezzo Rondine, four-cylinder engine developed by Gilera Corv
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 0xcbb8030e253e000b55466f9757071f060d419f42060a988b64d45587642b5c83. 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/930cb9f6-ca0c-46a7-ab20-c4f4544c5306.json and https://artists.proofprofile.net/proofs/artist/930cb9f6-ca0c-46a7-ab20-c4f4544c5306.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe448abff9cd69461e808fabb9e9e88e119e0b2f5618b383aaf48cf225b545c8a. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ZZOPM2230582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05fbd586a1981a685df4c3028daf2e36b59f3911ff7081c7cb35bc1e54b5314. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:54:29Z), 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/ZZOPM2235029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc1acd207ee8aca0875cb986dfe63dab225060026ece97b55c1b8085d701c7c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:23:26Z), 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/ITCV32411620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488144fa81bbcdceca65b332abb7335f576ce5dd99a81e00b534f9d777ee11e7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITCV32411621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488144fa81bbcdceca65b332abb7335f576ce5dd99a81e00b534f9d777ee11e7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:52:33Z), 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/ITCV32411621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a41d5a0c6944eeabd76cbfea1677ca20deae3e3e20564c7a26e9e69f0f6c77c. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/ITCV32411622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc1acd207ee8aca0875cb986dfe63dab225060026ece97b55c1b8085d701c7c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:19Z), 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/ITCV32411620.