Kedr ( meaning Siberian pine; Yuri Gagarin's callsign during the Vostok 1 mission), also known as ARISSat 1 and RadioSkaf-2 (formerly known as SuitSat 2), was an amateur radio minisatellite operated
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 0xc6345951dda5d219a8a824fae30332c01357da80a5ac76fea403b21d383d7e7b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66784323-45b2-44ed-a65e-4e9893aec76e.json and https://artists.proofprofile.net/proofs/artist/66784323-45b2-44ed-a65e-4e9893aec76e.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 0xbab620a971630e50e8aad94d5d14b8b96624217af526caa60a39ef7f3dd1a5ac. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SMRUS0073057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb790cee846a15318ff6b846439440a4fc36669bbfc1dfeb8d4d3a561050f387e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:23Z), 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/SMRUS0073329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cadbd07dd8b35e706852dc2c6ce539e04cd362c009fac490e2e876078fd4dd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SMRUS0075148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0949ab5d92fc5042b5ab750e0f73eda181df498d8acfeadc4034d92b3251c586. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:45:36Z), 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/RUA1D2406559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf902a91e3430d935ff7b67a53607be45fda97ac4af4603ad606be2d044997fc6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:24:02Z), 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/RUA1D2474746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70455a6328f362ae2325abaa0b91cf6908243f8644aa5ff11cf7472149f9678. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:40:26Z), 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/RUAGV2404985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d09106a581240105b8cfd73b4b8a2b677da8b544e51f712963b93cfb817b4e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6MZ2539479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8be29fc7df0f8b58032a10f9f15e6cc1322e085005d201cad799a80cb8b89a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:21:14Z), 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/QM6P42531216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa334abca4829a937201d1638a51958cc05f6bebffd9d28597769fbe97930717. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:10:16Z), 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/QMDA72538673.