Preoccupations is a Canadian post-punk band from Calgary, Alberta, formed in 2012 under the name Viet Cong. The band consists of Matt Flegel (vocals, bass), Scott Munro (guitar, synth), Daniel Christi
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 0x713aa99c247fb96f86862ad99cf37e9484754a141df89d58fbedfc94ef7a718d. 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/dd6cf1ad-afd5-48c1-a581-274dd88a792e.json and https://artists.proofprofile.net/proofs/artist/dd6cf1ad-afd5-48c1-a581-274dd88a792e.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 0xd34b92ca99f02efcd035e4203c7d00bc2eaee6d0a177d2230a7fbe249bc22df1. 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/CAF271402801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9baa5b017087de02078b34f9860d0f5e8603850902602f6f90f31f7e0df6ae0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAF271402803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62155bc2c2ec3f31eff1ae770d56e20bee2992eaac505b56d584c03509375999. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QMV8L1418904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eca07c650ce815f2b56bfe1acccce6316071d8e65489ebd85daf4963c9a5a1. 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/QMV8L1418905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3061ce265b8379748b9181b7efa2e3d5aeb3e8f78d905aa2cab2f6675a151fea. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QMV8L1418906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c491a9954d5589321ad4a7f4d3773ee3ee04c216c72ac8c343ec62b78595bd6. 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/QMV8L1418907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf96ef9cf66976ea426ecad800354ea0ce70f50c76e58e9b663f17f277db649. 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/CAF271502901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91e4d8ea3ef285f252ee27e0c4a5d1897f1ed4b51e149b7b97b95471042d359. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CAF271502902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c312d01b9eee43e27f3c74ac88d9ccf314a5ded2f9f7578efdf901ab00f110c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CAF271502904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590773b9962c7b6a9204cc45deedc6a5ed1e85701ab0a704bb49a0d7b4147166. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CAF271502906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df588ead4ecdf6d51781fc252290ee4d53128a0e47ea99f1f37110821f87c52. 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/CAF271502907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408ec56bea2d648c0cb3805a8504f881ff6c5d044dcafe8efb62dda12b622db1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/US38Y1629002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e67b13291e26343fe0f4bf9cdf65923c72bc718a765ab358c9cf3fbdfe1afd6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/US38Y1629003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca5e64bc3d2ada3b13b78115472e2bcb860e6f624a1554bab4d1520dbdfcae5. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/US38Y1629005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83127281788eec82ef4ea39427ceef8149ce905d96de7bb6a92fb9f7082c4a8. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/US38Y1629006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b43c0e92b5eb880447b4c389334443447e9d334d5e8bd888e036d76ef66b01. 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/US38Y1629007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d061561f0ff39c3b1fe23196c3e0897e17995fd5c786032e07f8821cfd4896. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/US38Y1629008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcd1768af57a63e30d3e3ea7ad4f213576453bdbb7f8a83efcf417306bc339b. 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/US38Y1629009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f763b4be6e3bac6092de709358592a3cc6a36681bfcc6a9eed8d5d5fb70135. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/CAF271803703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe5db7f11fc8dc254419fb5f1d405008af55b2dddfba5423a775ccb4d60c22. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US38Y1832002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eac70df431cc05107b6ef1e05d60c04afa40402c17d86d1f27df1630441237c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/US38Y1832004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4393e121f7492fc985ce81e61ce7aa4bac0ea11b0f293882a56c2ea752d44e87. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/US38Y1832005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57730c5b28c8c8955494473ab18ae4ee4e514795dbaf26c7fb9c55ecbb85d1cd. 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/US38Y1832006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccf1ae52af4e46500e5754bcd9d147ba3539ab2cc1f25fd7eef0b281477fcb0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/US38Y1832007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83eaed3244d04959e789bbe3111678c1183996f803bd54bae21ef6e2fa9d1de. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/US38Y1832008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112149ebd976997bc0cfe1f496a7bdd9e71920c310883ceea7967c1e831107ae. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US38Y1833901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb047f85e74d5c6bafcf3e2235afddac2a38c92b6f4646fea703bdff0695b1090. 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/CAF272205204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450deba7732253546d16adabb383e4759cbf0fea30cfb1f40d1e898521c1240d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CAF272205205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c078f3ec310eb516d36abed6b94a269d4683202d01df5127ea8ad7f107d576e. 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/CAF272205206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8395e82a9689230860cecdc5d2654aa5e4d1ad5e16e88c350416b83a3d856575. 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/CAF272205207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa789487529d5bbec4868942fa704710bf7c2a052736286a66acd93cf2bf532cf. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QMDA62461113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8c967ea6400103575c03cdbe960550542765af91adade9460efc7f8c0fd319. 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/QMDA62461114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9472e71b987fd5a4d39189bf76ee103a70c5fac8b52fe758a0b4421a5fc77554. 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/QMDA62461115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fbb3a76331be9508df8cabe47b0e5ae9d1b40125d4a2fa791e317f87a8bc4d. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QMDA62461117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b42119d1a160408ffe81559baf6643cf9a98d285f1e35c58705766840a4f05f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USC4R1602057.