Grupo Néctar was a cumbia band that formed in 1994. The band had achieved popularity in Peru and amongst Peruvian diaspora communities worldwide. They died in a traffic accident in May 2007. History
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 0x58698f47f6adaf26a1693a1255c961449eb2f24365187faa801921cae23c9f81. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cac235ce-81a4-4bb3-adb6-d92ee33dbb78.json and https://artists.proofprofile.net/proofs/artist/cac235ce-81a4-4bb3-adb6-d92ee33dbb78.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 0xc0c0b2162cb809f2351afd812350ab1ebdfea6b5f77e242bd6d34e33e3782109. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJX2452048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e888f3b2f6c436b8f675489bafcdfbe5679d589dd71d4526e80f7375f6d103. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:52:05Z), 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/QZNJX2452049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3836bf7c4136165325f2391ac76e720caf2d5f582b65842d14c840afcf7dab. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJX2452050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6004c97e7e8720ca8fa6311440a25d41bfc76bbc363e2ae811b4a661c7e041. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZNJX2452053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20db9783d000c657640fb28cf302fb8dad31bdd57e024c214ddd9756aeabdd2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJX2452054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c650c54978fbf53ac60a6cde26bec35ff098e87fea23f75a9c46b02138bee2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:55:47Z), 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/QZNJX2452057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dbaa604cdaefcb17327a998e12d76106976e31f6dd8acc63481c2e8c946d6a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:15Z), 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/QZNJX2452059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa27211eacb7c849257a1b580b6c88bd48ac4623adb3c373a1f43c80adbae71a. 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/QZNJX2452060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe2f16b66e7d1116f785d9fd90856a207098a2bc80106e00eca3ecc357be2d2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNJX2452061.