Handsome Furs was a Montreal-based indie rock duo which consisted of Dan Boeckner and Alexei Perry, who were married at the time. Boeckner is best known for his time in the bands Wolf Parade and Atlas
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 0xf569def71ee4375ded08d6221a9068249247399f3408e6de2c07a07bc62cb7f2. 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/95a72db0-895c-459c-885d-c2138c5aba4a.json and https://artists.proofprofile.net/proofs/artist/95a72db0-895c-459c-885d-c2138c5aba4a.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 0xbaa7e709db0e58f392c04f9704d6796b02925398349188b98771fd720388a5b7. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USSUB0773302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dc58812e1342870dbcbb6bcd775650fe8b394c7f385b8c296b4af37e6953f7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USSUB0773303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda99515511e81ac7901b981c8913f73f31faa3b751e260d579ded01f07df6d47. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USSUB0773304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9307a269c4c6205a4e6180e7bedc7446e21d77a145747349b09fbde1a5a46295. 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/USSUB0773305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba5cac15367a5255697c786971b695aad67e0a6054438ca74fda48c1647e97b. 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/USSUB0773306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7416929e93975a0c84a551409fd4a518e26f65743d9090bfa377e28c5d3c3b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USSUB0773308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739c0fc45c3d1850bcd8f7ddf335acd4dc452d24b461269c1810a6def7c669d9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USSUB0773309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f64f65b38081633d2c4248e1dcd826b2b15f18906f48d25434db1cc6d8c5de. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USSUB0879003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a2c792d95949e1d802405f75ce06458c45c3cdf7263aef5d9e093ea4989ed4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USSUB0879006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d852284a131fdf97ee82cc170813c24d3a16bb5be0ee2958e1eeab48f19be6. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USSUB0879011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5184d042ad26f67ee882c04313f03c26a16c2a9e83f1adeb1353b8575ecd080e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USSUB0879012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c67b9b82036aab2d4144afcdcc5ace157d17cbb8b497eb40d2429a84ac3d58. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USSUB1188101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8404cd955938c2ec06b8793601584dfc1a059e1b9c991dec6ae0386747bc72c7. 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/USSUB1188103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0da9570d22cf9bab875eca3c6c993b0c1dd13bcfdeb487c6b71c759fd69a3f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USSUB1188104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55856e7444683be30e4f4b9da9c9be957676cd0416f463da7b9776be55eddad1. 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/USSUB1188106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0f5f776b15c0d54de44301f9ff5acf45a9b88bd774b8e9566c344a47e6f44b. 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/USSUB1188108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb5635f28a10a4c9d3eb6658ddf8f5842d6f156f5aeb8b173d9688e5fb3c0a5. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USSUB1188109.