Cadu may refer to: Place Cadu River People Cadu may refer to people with the given name Ricardo, or a shortened form of Carlos Eduardo: Cadu (footballer, born 1974) (Ricardo Frederico Rodrigues Antune
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 0x361c947b51f2e33bc6034d9823f6f2e5a2eaa25295c6a316269395adf7a0f2f2. 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/fb31165f-6fac-4e81-bf43-7ee76164e83d.json and https://artists.proofprofile.net/proofs/artist/fb31165f-6fac-4e81-bf43-7ee76164e83d.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 0x0eea985e84b94f31fcde2935d600e0049e333023ccee231cf019dd6b3fed91bd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNJV2003234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b8535e0f717c53f55558680f10d7f65992f1d5155fa0203cccd8480e31a37e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZMZ92129331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6869839326919bb162533453f8d6bfb71dd9d7186d620a580f6ca7efea142541. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:40:32Z), 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/QZTPX2103105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff13d1e9e09a3b5c3202a495ddbe9a0abded0b6e49c37c5db36cdcc51b96ea4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZW9L2220431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55ae17b0ed3ca497d58cb5aa5f9a616c125d204a763ecfd41e3973791fe4f32. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZW9L2220434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6e46d93f8b01afd454c149dae3ce512690b52002c48afc913339e6e35fbca9. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZW9L2220435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857e600b8755ebdcf0e769377578a9f4fd159ce689f887b47065218defccd53b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:19Z), 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/QZW9L2220436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b6975b52666c328269c878f0ee81777d4faf112eeafea0831b5eeb596397f2. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QZW9L2220437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ed7bcfbce577ba660879809b9f5494f253091669701dadac68ff7c5b3ec879. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZW9L2220438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79933b8c114a504247c9864001369bd52f2aff1b708a5623fd8841c648983164. 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/QZW9L2299861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5beb877a87e653213f61770c1274f78b8e8a0cdfc93ef280aaa0761b2717df0c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/US7VG2356167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d51d8d53084a241987c6ba65df5472f08e497f50531fa81ac8879e629628b6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWV32410968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fba3b57918b949a96665b01fa72a08915426c61f103e3407900c593871ff41. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:02:21Z), 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/QZWV32410973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f56c5ff71d0d4a8af3ade9a0798bea20939fa60bf2454de7842b00c51ba4d0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWDE2381944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356444c9beadd7c4e83056e8876685aa18b78976efa354bdd5aa49dee830e326. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USLZJ2533650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6b55c9dc287b75eceac593c49544cb7bfc94fb2802e1e8ea54b8ee95a0ff7d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PT2DY2400459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279ccbc4cca011da419f978267a69748d39d400e1abd76166a9e8e82bfdbc7d3. 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/PT2DY2400461.