Lemurs ( ; ) are wet-nosed primates of the superfamily Lemuroidea ( ), divided into eight families and consisting of 15 genera and around 100 extant species. They are endemic to the island of Madagasc
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 0x50715e4fb7ed008ac5888171be234d57380b89ee306a341eeb055802da7ac555. 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/e81f5b79-6adc-4b77-9c79-111caf65d2fd.json and https://artists.proofprofile.net/proofs/artist/e81f5b79-6adc-4b77-9c79-111caf65d2fd.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 0x207d5c875c7f995a2795f09437e3374ea301e961b3a97b7bca7c3ad691065559. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DELJ82099292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd3ce938912504b38ff66b226f20397a12a247b311d4f9936fbeafd434ec7b9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZ901401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd72c506c1d93b0f31960b232acb507510196d2fe0d56bbf86a07e3cb1c77ca. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEZ901401056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4330b2e54e3b0636ae447e0b6512ac812de6216aa9ac02b4bf3209de89267a. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DEZ901401057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d379051d0dfb4b835f8a9b81f7ba5046da26f5a680f52d4b16b9192e1fe647. 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/DEZ901401059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e06bb5f72cba39670e35b13d530942276afb9eca0344a048025f072e7411b8f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEZ901401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab382c2b21593870760e02fe3039162a4fd9dd0c5db98995395408c21b2e771. 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/DEZ901401062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c750c6db9b2f23ee1ed9b0800ff9860f183c376ace84e0976d6591377a77b3. 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/DEZ901401067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169a05d069fb27b04cfdbfd1ffd20976544e7f3eb7b17d9fb2e58a22caa20db9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZ901600959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacce0801d57e3b67ae2e5e8f92662570c181470f8138abfc06e01c0be8461f18. 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/DEZ901600960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639d03d23edf82a1e4e22ed523c0760e68e67b2953adee2260ba8330cdb54908. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEZ901600963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc6127b3ab84bda5ebd1a9fee8affbf487d6cc29c9c1395373d83c9adc075f2. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEZ901601106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f8e94029cc98e225d2a4d83041de9ccd406f951c0c39b131a916e132c31f5. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEZ901601109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3043c3c0c74139bff2b26347258eadb377f65a081467930c7e5acd808ed6e664. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZ901601110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197553e97fc9c5fa0116e4028ab94a292d6808954d35fa44de9fc995ff081d9b. 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/DEZ901601111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540f9ffdf19a720a09a6c2e4e02cddb55d5d1e47b0e89661281d29f4368256ea. 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/DEZ901601113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7db2854e3ef3a925af89fd580f794cb71b70063822e954e1166891f6eb534b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEZ901601114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dc469a2cb5dead8316daa7eb1f5616a0c2fffeb5b200be9f3dc9d7f43e9a79. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEZ901601115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef5a7ee95858e6d91a125bc26a6dcd1e203bbf53782de4d131f1d2131826597. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEZ901601119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f36db5dc9c86497ee2e9d0d10601802f89e0df57034d9b0c21fbc1530c1ec7. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/DEZ901800930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0737cb275c4e1381d18a2ce7faa1cd1af194287631ac2fd2027c2eebf5dee701. 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/DEZ901800931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eb5896e43c0613b4aed42a39e6f72974e0e5b3f681a0450cfc0781b5e5d438. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DELJ82096528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3715c7326f3072430e57cb5801eda3ba7eb5b4eb73b5ac21f8d4c6db7a83a550. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/DEZC62160951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea63bd464bcffc2973c45cf184cea8fc393c67ad3de6b25d10c52fccd579a83. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEZC62162013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b721745bc19b706fcf74e3c60f0da69e3e339ed3e49cd562cc42ae2148e3a9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/DEZC62104183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf249060b6fcd52725df6ad8e815dfaaa94a74d3798b8a424640463e18744ac. 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/DEZC62104310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ae5c72db23bf277957c80e575ae835241c91853d25daefa034a3895d0a7538. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEZC62104382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72bc89fa82d32ba6354877b836ea566b249c6cbaa5065496a736efd78615f9f. 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/DEZC62134182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75be13a001756839438102e1bf9b4f894f668a6c96c9f6ffcbd393d1e8a9bfb. 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/DEZC62134257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a49bc48cdc9e4df82db8122dd6e397c2b3c46be66cead07d13ea781acfedaa. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/DEZC62248382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde18981119d4323bf2a12b2a566a3d7a34e56ff3edbb28c056adc6e646389b19. 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/DEZC62248386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197f22c2ac1405947b53d7c599c970765b5d95334ca1635c01791862db4f85f7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DEZC62248389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240f2065f2814f0680773f0de3dbf1ab1f0f5e2e56f557b9189ce38fa1709381. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DEZC62253767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e50df2ac34837d7a95c7c86c67317523c599cd18cd5b21757ace07c1cfc23. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEZC62255172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81c95cdab220860031f3680d0a971b9e5512dc78b3f974019888ebf3248e8be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPW42001680.