Leatherwolf is an American heavy metal band formed in Huntington Beach, California in 1981. They split up in 1992, but reunited in 1999. The group is also nicknamed the "Triple Axe Attack" for pioneer
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 0x758e7e9b0fe0e3ba23c4432657446d3e755a573c32e5a3e8872b3362aa6768ae. 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/a09aaaea-65d7-4e9d-bb8f-c0cdb7650f44.json and https://artists.proofprofile.net/proofs/artist/a09aaaea-65d7-4e9d-bb8f-c0cdb7650f44.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 0x2e0dc976a4a0184ab03ed3042181b0650ee4a2c26022ab5ead4d8ecd5dd1a214. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USUM71606738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf98b659c3377c076c26589ea1630bfe05332d45fcb9e17d36a51594df04e71. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USUM71606740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9ad54e32b522c5859a185aa4eab261d12ff2215d098d260cf2b765fdd63a8d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USUM71606741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c5026d2a3eed9f6e0d70c9a2b6e801ad493e94546a871855d9856dde08aa96. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USUM71606742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2737446563dc77a90f3c11e00c6aa87e08629e71c8ce5e4978518c9af4a710. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USUM72202161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9049fd5d77bd40a16bbeccd985ac714b06e88d51b3cfd6c7fc2dd8dd1376fe1e. 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/USUM72202164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4155f740a1437f032a5e77c6b4b16f3a4fff8def7baece1f0d17b07f849c9014. 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/USUM72202165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5867b0efd5e950a20518e8bc05f18d13c423ff185c47d9958f60d7c919b152. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USUM72202168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67013574dc477517c6e98a1ed6628ccdb2948fe41f41c0e5b149e03f77b247b3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USUM72202171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a0d4fe08b9135c4d10bdb751960b3e445739c9096adc7ac101fba1d973948c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USUM72202172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7995561a619bcc835c9a64b70f4c1ed63fcac93d858490e27c21507406e96df5. 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/USHS60700709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5552424ab29f806be0b7f7e087af02385377be7f2503cd6bba2464932734264. 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/USHS62200800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661f68418000c0958d85eacfafd406e2a082fa175ca46ff3fcd8c5ddb3471343. 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/USHS62200802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd165decf4f504bad8bf313808d45884d8bd00e3ba423564ac930ab0f36bf97f9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USHS62200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7105cd5bd5ab700ebd9088a9cdb333d233308a2db8c4d0c8d417081711278801. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHS62200812.