Usnea is a genus of fruticose lichens in the large family Parmeliaceae. The genus, which currently contains roughly 130 species, was established by Michel Adanson in 1763. Species in the genus grow l
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 0xf661523a37763f111f30c2c6d39d054b6ca74b5e458c0e1a131043c4e6ca1db8. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d9f3ff1-4f5d-4660-934f-90d78e779e4d.json and https://artists.proofprofile.net/proofs/artist/2d9f3ff1-4f5d-4660-934f-90d78e779e4d.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 0x0271936d263248e57be498a3fcccf951e4465dbd916be93cd07e173a74833365. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCHW2320201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe106ced85a59aee57346535c3b48516326b1301f032fa0d195286bb7c0a4614a. 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/USCHW2320202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e30fa81088f13b317ea1d796e0a2212e9fc9a7d9c8f935ab8c4c7552fee455a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USCHW2320203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c72f327b4cf19a5bf1d71bb7f78519093c83b22f2737b54e9e7991867af1a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCHW2320204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00afaa89100cb06f832f8872763a0a9df457c152d8710f8c25ba8f0cc12d2df8. 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/USCHW2320205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fb4631619e45fa67c37306af90ab5092ab562c3c00387a57f47a9709186127. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US2641737401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c6aa4bb6d2439e0c10762146a10d542f139b6809a8ec4b09050b744b9cc9b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US2641737402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb1cc8857b452cbca6f0bb048d9b382a8e07ff60dd69583d7a1c0fe8e6f5683. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/US2641737403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1ee5f0f20a88a82ed680e193d6a7e608103c06e1261f24b75d3041bc00cedf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US2641737404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa5ad02928b62830da2c190123e3287b964c3ad1a39faf8ef99ba934fe77f93. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US2641737405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f74f6c83b7442763eda8ae1a58405a29d8c9c7837dd316ccd47ad1dd34e3f16. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US2641428002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb33a47c4e08a07eef91d1d58947eac0f7817e32a74849f635ef78a88b287cf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US2641428003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08f0a2e1826dbff9d03e17b82c1921c7ce758def111994b20e0cc7978e5413e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US2641428004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e30fa81088f13b317ea1d796e0a2212e9fc9a7d9c8f935ab8c4c7552fee455a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USCHW2320203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30330639bbd4595a5390db70dcb26f11db0726e1bb9d08ba6d950e4d1300dd21. 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/USCGH1359892.