Lupa may refer to: Places Lupa Ward Ward in Chunya, Mbeya, Tanzania Lupa Gold Field, in Chunya, Mbeya, Tanzania Lupa Island (Hungary) Lupa Zoo, Ludlow, Massachusetts, United States Mount Lupa,
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 0xc2dc5e8d8946239ab3dd0c8120bae220f52bca6c891e6e66e081d04ae62dc161. 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/75fac8c3-d127-4fe9-ba0d-16b2b27029c4.json and https://artists.proofprofile.net/proofs/artist/75fac8c3-d127-4fe9-ba0d-16b2b27029c4.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 0x11e25e7fc8912632107b62136314d17fb8d0d4c3232dbbab46028608d452ca22. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BXVFC1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff1bb31f4cbb320134415435d87624186e5c9e588a17cb3b9ae0b4b1e408d8b. 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/BXVFC1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4618e5a2e3774e6908a3fdbbac84510ba0565c4be4a5bf7ce7a492cc39ed7a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/BXVFC1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969e0e291a1c49973974607b26b88b21a29ea5ec763a1b69344cba98f5281cd9. 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/BXVFC1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fcc3f1302afc1da1958f96fd43f013471b40fe590d5e26057f61a04cf69261. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BXVFC1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcace55bc028207d3fa695cff96139cde8c719d1d02c441e299876798dbd6e6d1. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/BXVFC1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83907deb8018ed482ce097e3c230db03dea72a3853deae000ce075939a534f98. 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/BCZRX2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5094bf844250e4920050f7d2f40950503a9a8776aba77a16952b255a8188be1c. 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/BCZRX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce81cacf683244437fbbc1b7ada25bb448cec81e1c7e0cadd8b3fad894ad73e3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BCZRX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42c852a9a0ca63476774877f2ef5ba97b272a4829d3650cc0c47f9713a53ea4. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/BCZRX2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef83beabedb1d4fb7c267a74955c83dedca6674f2359152e3f9e6bb623ad180. 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/BXLYM2300001.