The sable (Martes zibellina) is a species of marten, a small omnivorous mammal primarily inhabiting the forest environments of Russia, from the Ural Mountains throughout Siberia, and northern Mongolia
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 0xca17ae99ed8a5d6bb5165c13621dc701ce75675dfb3773b53a4630c7ad41a550. 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/49a061eb-5b6b-460b-bba3-0fdac5e1d69e.json and https://artists.proofprofile.net/proofs/artist/49a061eb-5b6b-460b-bba3-0fdac5e1d69e.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 0xa0520827796abc6554db06b5b865d2ea2c09c4e36cfdc8817469417417f26fb3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/CALVP2019080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40c478082a21381476ab4b3f0c420fe5c73293f92ea4b76d41f58b6992cac07. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZHN72077178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014241da578eae2feb18501b8a63ee8e75b99fb5072808169c9d6616636b7bd0. 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/QZHNB2050380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4cff031cd26bb6380e05e7d4df5afa8032ff79e366a684e21af545d0ece51a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZK6H2028539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef8d09664665b3d271ce2ffcd91880ff06bcb612161e251e80fa957d6d4e347. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ72185562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f01e927638a6fe718ecc25dd651f18a3fd47af1c2eb6b53238d53a3a51098. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZHN92128852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bb5e22870441e877ae28ae15f061a34eebc504ea988d6592e24dacf4050479. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZNWQ2187374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119bfb8a91366d3f93de9941a50a4eaa77db90bf889a26571295b9c79884d50d. 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/QZNWQ2187375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed083f280d2bec4f40e7c054e9c819203cb480aa37ea029d4b007355f12a47ca. 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/QZNWQ2187376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5570b7a5cc46b47916e09cbf86194805e6f16b1c0dbb17cec93afbd55cff948d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN72243343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3140a95d5c256e31a716442312434bdf53dd7ef61bc853165a59772eeb27c15a. 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/QZHN72243344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1239300af05a468d8bd168db0d34864d5c116c2ea4e928ddc389e8638d7439af. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZK6Q2249229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf645306339c3f29801c7f9ca1b5e86f428c24435c00cd326e4285edb085ff6. 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/QZHN42303050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a412b067ab18ba5d081a13d5946c747bb4c64dad3aeecbb9e2b6baf405587df. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZK6L2359158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8ed971f6c06dd3cc4b43605a6305109dc0b16927a4c4808f0f0d952a4d93bb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ72422562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f51c072b381d3a8765d6cd13771da909159b7a3afbb02479e692c0479823d5c. 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/QZHN92444541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd438fba9120462663593bf1fbf7e72f8c6b2a51e74e5ae83846effb30ecaed91. 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/QZK6K2498737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37d23569a655aae1390dd23a7c11e17ac985e0c5cbebc78e5f97df34a6a317f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZNWX2495664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489ab356db983eb6e628e09fdbfc7c9c2410499ae49a2a6cd7e07754416505db. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QMDA72456933.