Sinyaya Ptitsa (, The Blue Bird) was a Soviet music group, vocal and instrumental ensemble, which existed from 1972 to 1991. Later, several Russian musical groups created by former members of the orig
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ab5416073fb592529dbd59b76bf8c9c36968ceab91553eb6a88071836e2088. 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/6baf16c9-e8c0-4507-ad2e-09f1e99339cb.json and https://artists.proofprofile.net/proofs/artist/6baf16c9-e8c0-4507-ad2e-09f1e99339cb.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbf0d85272517449f08fa5e98de18f51dd8efbe91d84e3a5ca7b61a1b084878. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR6V82512709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8791035e7b195d7c06f345df28a3e2d3fd5fd66b67ed58ec47e12c20fe7ede48. 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/FR6V82512712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd274afdb7219a97f9cf0365fbddce14936ca02346c103a68d963a88a6fadc9. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:03:03Z), 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/RUAAX2001665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3025d3bca51cd4f378ad044236b1ff8edcbd533e8e3a7648787e40862459e7dc. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/RUAAX2001672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02deb5c5094091c1a7fc6b6e429f01fe761308b2d49b6bb8b771746d7e9e4ee. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/RUAAX2001675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800e4ee5bf7ccfd1e45d30ff0d02aadf182989ecee632302159c6c9331b5ff84. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/RUAAX2001681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b7510fa62b9bd854c2a6521611a0aa36ad6626d7553ba92ac2544c04c68692. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZZ972317945.