Caju may refer to: Caju, a river of Roraima state in northern Brazil Caju, a lower-class district of the Zona Norte (North Zone) of Rio de Janeiro Caju, the Portuguese name for the fruit of the Ca
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 0x54af2b9f3514472ff9ba4717d8453820f888e4b74d96232da65ad4855fcac91e. 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/c169637a-e35e-4e98-9094-f380f64e1701.json and https://artists.proofprofile.net/proofs/artist/c169637a-e35e-4e98-9094-f380f64e1701.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 0x01c9de1181b3785fa4bf69307a58245c63c6a993f0af166a47cc1ec832081cdf. 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/BKM2L2400192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b1ccbea108022759334d5b10c4c92324bfce8bf807d4e7995a5a76070b0c5f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXZYA2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f4264e7741f45df68be5145a016dd758823ed62418aaa0fde2e23fbf3552f8. 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/BXZYA2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48eb21dcbb984f352827569e868aa3cacf6e00bb802cee7cf17887c9d8c816cf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9K2360590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c981a30f75f882769751aa6dc79ff4a84ce624777fb8d83c1cd45195fe4ad8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXZYA2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b1ccbea108022759334d5b10c4c92324bfce8bf807d4e7995a5a76070b0c5f. 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/BXZYA2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6527e3b0281d19ecde4099ffba71f912f00639daf084e9cf673641580d566515. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2360591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0eb2656cc337b273fbb29249307c85bc07ac6d9a55a415dffa57c185a3d2e5c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXZYA2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069ccde698b33de99f806da57b68e99d3aaa4ead6d676039dab225162267aa2b. 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/BXZYA2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b1335da53fa47375a1b1924d668ef48c735a82a940a88f0e9391417d43e217. 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/QZW9K2360592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823aef299f5063de758dbe73136c271b49bdb470e645ceebec88a664478667df. 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/QZW9K2360593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed738daf749278213450df3047b852a1629666a4795c5d0e0ef2a8947066398. 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/BXZYA2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71eaa0fa4d8594dd994880f76620499c94a1a6ec644adc0c81cd34deac39e34e. 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/QZW9K2360594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22384dacb2c832b5f6121ca9f74fecd7e110d4244cb4ebc32a2325480bc45ee9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US7VG2445617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a912d20f4ea23e80bbd5669f44914ffc9ff5b2eb52917b47841773bba8556fa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BC4TH2500002.