Varsovia (Breton, Latin, Romanian and Spanish - Warsaw (the capital city of Poland)) may refer to: Varsovia (train), a train named after Warsaw Warsaw, the city itself
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 0x0099ef70b785e44d23d0a281a714c60fb6ed77da866631595831d4c22ad0d160. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff804aae-84d7-44d0-8033-dcbcceaec138.json and https://artists.proofprofile.net/proofs/artist/ff804aae-84d7-44d0-8033-dcbcceaec138.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 0x1fbf52d45de00458e1accf8c6d22a905087ce47a0da1d3b0fa8f8b2c29e50242. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBSMU3007773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaba7bb65545365ce17e2c5c9d4e913156328195a9b973baf0af691a1274ee2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU3007775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee9732f55a20afcac9784a58a07ed98c91e09160cf755321b496f0c8042a9f0. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:45Z), 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/GBSMU3007776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9749de198127edb1258151eefaf46effd55b7685c715cbdb17ccf4b12be0fd34. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:44:53Z), 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/GBSMU7715354.