American Head Charge was a metal band from Minneapolis, Minnesota. The band has earned two nominations at the Kerrang! Awards. History Formation (1996–1999) Early incarnations of the band sported
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe536ec147f712d385fcf488fd295ce8331063c0311385affbdaedb4b20ca1edc. 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/0bdf4d33-0831-4e4c-bb50-56113a8d8376.json and https://artists.proofprofile.net/proofs/artist/0bdf4d33-0831-4e4c-bb50-56113a8d8376.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f6ba8fa5f9d2f61a937c7da6e382c6b7f547bdbbc0c47f0ca75a23bdda1d87. 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/USDJ20110966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ae729cdd3238d4bed64ab838349dccaece72a4050a318ff5fa5bddeaf649d7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USDJ20110958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5a462a24817564c8cc958ccf8042eb505a0c46d0b4bfc5c8959fae98db8799. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USDJ20110967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cbf4f8d06cdf46d640c1a1c070f3753cfc0c6c8a52b188a957a5837b744c73. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:57Z), 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/USDJ20110969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b530efaab53da3eb6f4763d0e70132359a9954a2ea36c9f81ea0fbd459277e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:16:30Z), 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/USDJ20110957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa491faec0db9d11cad2ac3ecf61dfae4e3d65854b0213b685b9e335664cfae6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USDJ20110959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd024b2416b691b7cca0984670864c81a89420f629b93dbcc2c99e18056bc170. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:21:08Z), 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/USDJ20110964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce4a39423e4c38251e7d60f8eb1a2aa0f65bcdcf2d0a458c26694a855ba51a6. 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/USDJ20110962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21e2588cb01e74b8cb73e6a3c07e41129c3c23d023227c8b951c3023505fce3. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/ATN261659503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf135729ec6d2678921a46719a1254bbaa0c6e22e7433d33ec3704c618ee5f175. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:23Z), 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/ATN261659504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d601415c2a7ddb905ecb14fdfab580609db9b1ed52ab9c56424ed5bc482def4. 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/ATN261659507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1446b115010e1e2f23bdf5f91df1263eda121f8a758d036005400d234ada8c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATN261659508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604278e6d4a7866525610d42c43689ec3cddfbb0e489e5c87f9c6f55ddf7c1d6. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/ATN261659509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f262db8ac7f5caafc0b8c43493d55815fa60671db6bbdb2214019dd1b37e00a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATN261659510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ef4f8ffa02aa965404ede028f350b08e57a3a2a9df4d9b144bdae40f1f7f42. 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/ATN261659511.