A marten is a weasel-like mammal in the genus Martes within the subfamily Guloninae, in the family Mustelidae. They have bushy tails and large paws with partially retractile claws. The fur varies from
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 0x26094b3cee77044513351691cdf6bf23506cb8f6faed947c205a4960fe8c73db. 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/cb8bfbcc-3889-487c-928e-2f2a896b1517.json and https://artists.proofprofile.net/proofs/artist/cb8bfbcc-3889-487c-928e-2f2a896b1517.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 0xf20ffead5fbe8dcea7fa7e9a58c695a12c1a6793f11c107a91860d015c4f22cb. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/ATCI02200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53eb8fe353ebaa3f638d84216f7b8716259ba5f20dcfb9c491828bf466b2445. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ATCI02200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c138b374accb7729adb4d54dab3a4fb7da67abb552caa474f927bbbc76601d7. 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/ATCI02300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c138b374accb7729adb4d54dab3a4fb7da67abb552caa474f927bbbc76601d7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ATCI02300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2607871ff96afa9e5507eabc35f02f84580db315345da2ba7518899ffd67e9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ATCI02300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43c5f6192094498722d05c181c0d8775fe99f8035e9261afe0e91b3303fd682. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ATCI02300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43c5f6192094498722d05c181c0d8775fe99f8035e9261afe0e91b3303fd682. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ATCI02300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117401ae644eaa58826f20b8e9a221f1b64618e677dedcb69abcc888b89f88bb. 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/ATCI02400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c0a36f854649e8963a6d56970b17fcd2fc4f422b7551e417b4f4e3c282f101. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/ATCI02400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9556bec69fc170176a5557d37a3c2064ac882c9e71230a27394f5882352443a3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ATCI02400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad1c8d0d053631d9e54cf7a02fc08b213efcdda4ec1ab6842b75eb3a2e6ca91. 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/ATCI02400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4c8ff646435a532e79141945504dbf4c996b696030900437ad425098f2c884. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ATCI02500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad1c8d0d053631d9e54cf7a02fc08b213efcdda4ec1ab6842b75eb3a2e6ca91. 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/ATCI02400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53f23a4142bf2a79e9fdeb4768196f35f205e3c06130f6f6fab1f861707a30b. 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/ATCI02500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad1c8d0d053631d9e54cf7a02fc08b213efcdda4ec1ab6842b75eb3a2e6ca91. 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/ATCI02400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4c8ff646435a532e79141945504dbf4c996b696030900437ad425098f2c884. 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/ATCI02500028.