Rajna is a surname. In several Eastern European languages such as Hungarian, Rajna is the name of the river Rhine. Notable people with this surname include: András Rajna (born 1960), Hungarian sprin
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 0x7f322fd52e0009ac32d43d8a7c61400b9392b6e2733ae08730a5e4f5bdcfa85c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46a39a67-1b4d-4ffd-a1bc-e68d8016ff04.json and https://artists.proofprofile.net/proofs/artist/46a39a67-1b4d-4ffd-a1bc-e68d8016ff04.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 0xd9996e4890cbf470b20d1a0ca16eecb7d7a0b7e37f5b2328f36a63d15e52e7d3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHK90811305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9312063e1c839678d237e13f8bede501e79f36bc865cb992419beb70eb26f2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR7M00409001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4486d5a5c53569f3438dba8c46b7d382cad0f667176f6b329fecdbdfe294cd8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR7M00409007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46ce7130cd2a7e5fba9452f294e5172285ba908ce5314dda20bccbfdb476db7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR7M00510202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe07016a5800464cc0d97bb6bedaf2e476bbcb46d3fa956fe93552c0223d4958. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:39:58Z), 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/FR7M00510204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a9556864d3d0602d16d5a43fb4a7ab6588627bb727a998064ef424aced5467. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR7M00510217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851bd0b261846df78c058890d164cb24fe083f9be9ba5e8b9ff35d4cc2e74a4f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR7M00207401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b6e5cf697649e486ad1b1b1c2168d289f67ede75eb8fc643b5ba5ce57fe1a7. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:44:54Z), 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/FR6V81082754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74140a04e7cfcf9eb6a31f76ea7ded4a95a4abaaad5b445d323f7238f1c369a9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:45Z), 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/FR6V81082757.