Negative Approach is an American hardcore punk band, formed in Detroit, Michigan in 1981. The band is considered among the pioneers of hardcore punk, particularly in the Midwest region. Like most hard
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 0x3fce8e563bdfc6a48327d3c8733e0dd3dce9e96120164ffb68ca48fd1561cdfc. 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/f9ebeef8-1b48-438e-abb9-ad482e664f92.json and https://artists.proofprofile.net/proofs/artist/f9ebeef8-1b48-438e-abb9-ad482e664f92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lost Cause - From Process Of Elimination EP 1981
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 0xbe3d82ea1624dc4dd5e40e37f90e0689ba81eae51f6c596a18559028a6747835. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USTG38100403.
Sick of Talk - From 10 Song 7 Inch EP 1982
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202bac7461aaba0cee399b3d714998dd00396d8417d7d46b00d05c75999c0067. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USTG38200702.
Why Be Something That You're Not - From 10 Song 7 Inch EP 1982
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da93c4eabdc7272e1517f02f6d5420454e38a03093ae953c0c882bae461ad79. 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/USTG38200704.
Fair Warning - From 10 Song 7 Inch EP 1982
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c8d20604987ca57eafad0557f90db654f083e4da7309f8761d337b2914b2e5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USTG38200706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906bccfcd5921e669debe7c677c5f475f96ce20654ba6bbf4299ca3861a78537. 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/USTG38200708.
Negative Approach - From 10 Song 7 Inch EP 1982
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab43b6cc4d93f8702d728008b7106f4ee135e6ac86952951c9abdbebc6becb1c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USTG38200710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d5aa0efba1c449de9e73d5444f17c6ded74ac59aa481c1bcc28248b80e037e. 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/USTG38300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40d167672b694c9b965368eb345633b14aeb9e84404f36925efca066e36273d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USTG38300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270e333d1829074a693581c50c360fd84dc9fa557e43ba15ad585d8068c6315c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USTG38300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f54f05ec4d17fb038878590c4de62bc4b3e7544eb0b365c0fba6856da16bfd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USTG38300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc2e8d2605f32abe386fee5db392a7ee4c2486c402126d05af15fa4e680c049. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/USTG38300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9419bec315cf58fd803979532b34a1c0bedd0e087143df13f2525e572dc233e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USTG38300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a91630f0b68c160189a62399e6b1131763683e15514ff66bb76996bc96359. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USTG38300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d5aa0efba1c449de9e73d5444f17c6ded74ac59aa481c1bcc28248b80e037e. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USTG38300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40d167672b694c9b965368eb345633b14aeb9e84404f36925efca066e36273d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USTG38300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270e333d1829074a693581c50c360fd84dc9fa557e43ba15ad585d8068c6315c. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USTG38300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f54f05ec4d17fb038878590c4de62bc4b3e7544eb0b365c0fba6856da16bfd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USTG38300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b5d65b0e44a36e33c07fc56054c81e20656d37b180fe648c134a16402229cf. 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/USTG38300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc2e8d2605f32abe386fee5db392a7ee4c2486c402126d05af15fa4e680c049. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USTG38300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1943c36693d1ba01b9e7e6313897fe6520f4dd9d9f80f62466e3d4a06e20bb8. 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/USA371428257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1aed67dd668ab779fabb02543a6e0a096145b466bc8c09d07f35e0bccc9f07. 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/USA371428258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe7439548991912b010df9c5219261bc3260bacc36f0469da266ef89654b5a5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA371428260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc43b194c238c25a78a992116b1f93d90996f1cd780e5bef3c268dab8a9ae6fc. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/USA371428261.
Ready To Fight 2nd Take (Clubhouse Demo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc563e6a762301384ccc135c4bc921f229878e3657e966112052cd8c2df2cdb26. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USA371461694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0475f559b82abdefbbbacab1469920e02b0f311400b0e3ea12c2f1c33cfc12bb. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USA371461707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83107431b6f5fa3279463500fad29fe8560d17e21c86a5281e28e72010b09fc. 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/USA371461712.