Radu may refer to: People Radu (given name), Romanian masculine given name Radu (surname), Romanian surname Rulers of Wallachia, see Prince Radu of Romania (born 1960), disputed pretender to the
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 0xe5f9d3fae3273c51680901f0f5daa3f1782d9cffaa8df8d4a509deab8c21641a. 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/9713a2a5-69be-4472-a7c9-0c68f1fa5be1.json and https://artists.proofprofile.net/proofs/artist/9713a2a5-69be-4472-a7c9-0c68f1fa5be1.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 0x5c677a5899854ed44c28fb8037b99dc88176ca6a7348684c7739a9844bdbc05b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW2187740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbcde09ef7222e5305858531033521be384af53da469da4c527657c70011125. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ2163711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcab1279505e21a237009e658f8f923dc78752f6026295f0f4a2c3d8eac8dae. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GX3Q92085263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8db14bd4ecec1a18ed5ee9cb91013c6ba767bde0594c85326b7f0b01e62cb19. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GX3Q92199901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3bc9fd0b176bab063feab6593e63f45ffc9acd1d2acbe8f40327fa5bec2702. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTPX2274100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5229839400316b9229c1eae477e59f177c7ab059fa41d058b0bfc3989b0013c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZW9K2267285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa400ef9988357e8e4333706afe80635060ee38adf59cd92167a1f92edb5ded64. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZW9M2230583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd24bc788d48a9349f3c2b15e3c07d38ae10eb75cb224c61531b61ab63b7a28. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZ5AB2338940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a7ef92ee1203e2183cc15072a0431f666d20e6cc413991647b7aad0afbe757. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZW9L2402662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b9c691c924010cf449e4a1ef05719791a47bac70009c73a1d61406e27fee19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9L2484511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c40503e5be103c6afb8cd67d9a835b979e6ed6d832de11ea964814c6cf48ff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2412406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386972ae0b34f1384afd390273a18f77ddcd5ed4daf7b7c1fcd428a92fde75b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJW2390700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386972ae0b34f1384afd390273a18f77ddcd5ed4daf7b7c1fcd428a92fde75b1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJW2390700.