Backbiter is a protopunk band from Los Angeles, California that has received national recognition. They played their first show October 23, 1991, at the Shamrock Bar in Hollywood, CA on a bill with Di
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 0x078743739aeea2190070c52b3c3e6f70c7518b197038345daad6edb1c3bab625. 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/9ed10eca-30bb-4553-a48d-c34f2d840363.json and https://artists.proofprofile.net/proofs/artist/9ed10eca-30bb-4553-a48d-c34f2d840363.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 0xa242a83b32061d80a25889143d9f2209a0e1e270ac362843a2bf7cbf3af45255. 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/QZFZ22139772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd926963aa495c3300a39c6d753780d5336eabbea058a5c1c372d8bd7cdd868. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ22139773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b6b208531bc8eee99134aea4564d6b93393e545cd5354d76d97052d21d2cfa. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZFZ22139774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7d0b7554433c3020935a83246cbdbf5954b2300c9c888e7cbc1cd519bf00dd. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZFZ22139775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f72e1a276e7106c68a3017ae0e80a754a52c544668e8dcc862bf2ff9ec2f77. 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/QZFZ22139776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7659145990e105f68299815faf0dc059621ef42ba499a2ed38281f7052ad97. 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/QZFZ22139778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee731fb98394d32b6dbabf5f1977cb8671f6ac8ef3a2503d6a4d48092c4ba5d1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ22139779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe531e193d922eaebdb5d8e06acd1a901e6e19de212d4ca71e8253b0061fc6d0. 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/QZFZ22139780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed065e989627a55d337953c320a3c5c7c58edaf36c851399a8c40d44e124ec0. 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/QZFZ22139781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c0311fb4dc4ada2fbd2980e0a58a08869e0f204dee62de14e5126008a7b8fb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:20:20Z), 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/QZNWS2256007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b895d872825beb1e3096f022e69efe4b50fb131253b870280e7c761c2b3293. 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/QZNWS2256009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8ff77903caaef2d28a651e6c1e19be11380323b5800d040cb39a8dbd5a28ab. 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/QZHN72304068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06215bd52594ee45df05abeb6ce2dbab381bf469b99e7b537bd4ae361e9ad342. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN72304069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7e6a57b21edcd23a19a9b2e136a084b5e4e7d6ced67e2466007792805a0e2b. 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/QZHN72304072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f41e0b045dfbefe18c22563a94bd6c3da7310c357a170ad28468d2a1e8cea28. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTAU2392979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e925aab06846cb23fbd4f359280cdb4f6ac1e9b2293d3cbf57a241f1ba48fb. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZES52458402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b7f691bd90060b95226390259ea58f85dc95f6636b262efa3bf8026e0af673. 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/QZES52458406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d3b175d9ea989906aafbf99d2a7a857f0bc2ea8e4a3089d628040f362c4453. 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/QZK6F2434047.