Tacocat is an American punk rock band from Seattle, founded in 2007 and consisting of Emily Nokes, Bree McKenna, Lelah Maupin, and Eric Randall. They gained popularity in 2014 following the release of
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 0xe1ae93f807a8bbe098895b9f0ec69d2bc664465abd95dd8f39e1de6d79506903. 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/f665edef-ee33-44e7-aaa0-3e0f880785f8.json and https://artists.proofprofile.net/proofs/artist/f665edef-ee33-44e7-aaa0-3e0f880785f8.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 0x399c5246f91a1f321fc43df62de87a82b6ff0c9211a8dcddcf05664ff43d0b0f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHF31205601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4a1d184acfe052a1d8174cf5b22ed4112bd984a59934b0d758ed59d71a04d0. 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/USHF31205603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba459112d644c6509af7e4972a79f5c6a3c0497ae70f126e5346f827159593b. 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/USHF31205604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59b53fe1bf4110b0e474be2b1a730ad8fdc67f23e7737902aa01c6d48d8e288. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHF31407901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842eb275032da9655ed1e52cc516781a0160885c3a86a983e3f60d756e992253. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHF31407906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb886930a8dd2db63cdeb0b1473b0145b7eb0dd4c217d990a13912b7bbe4960e9. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USHF31407908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dec700418648ee5e404b1488d427ba041f4157c25069aba047e1a4192726f0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USHF31407909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1b754852979c661689266972e6e7dbda719a42ee0e7a8508d8c3c5b858a22e. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USHF31407913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b14b26448436c7be8341fa1aff6b675d4081ffadffce1acc3180058e230e253. 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/USHF31609502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8167d254cdc10d775031698ceb9699e429471d3c5e06473d1412b0291e17ecd3. 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/USHF31609506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf6435b99fe1f346801cfbf27e44a998302d0e82496947f4368befc67610e06. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USHF31609507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232dbd2b80e33be35c6ed0656b8173351b5e568ea71e2ff2a7f7af0e348165d8. 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/USHF31609510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6179b215a8063bebf4fa3912d22c495965ee5b29b929e1c5a74ec271acc71d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USHF31609511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90c5498ff50ab0a91b1cad024f4895aeaec26360a1e5ba6ca45fcaa350840a0. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USHF31609512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f4fd146e2e06868165b8c80cf2ed2e2f867345518ce4566d3288dbc650356. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USSUB1928502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bcdabc9fabf5489a10a7c31c7d82bc100cee41ce8bb039fbc9c619fdf8d2ad. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USSUB1928504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb140d9e4861f7470e6b4181aecb517820511977a8764f58c3ee09053080d37da. 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/USSUB1928505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7015b38d97efb12d0e1c57b80eee5d46dd4f0d761b134fc20a5c2a7445745330. 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/USSUB1928508.