"No Class" is a song by the British heavy metal band Motörhead. It was released in 1979 in 7" vinyl pressings. The song first appeared on the 1979 album Overkill, and became one of the "cornerstones"
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 0x661413cb7e4032d1fbd0168184f6f8b990de190801036de7f227ec2e75ba971d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc219f00-a7fc-4742-b4e1-59db3a07b27d.json and https://artists.proofprofile.net/proofs/artist/cc219f00-a7fc-4742-b4e1-59db3a07b27d.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 0x83ad04f2404cebb34c785dd2aa9ff4df0dc8a96ca655aec67478e8ec635f897b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM91834566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842f2b32ba00eeb0ca6d525906ae045852f08b53b42c37e997ecf1227de956e1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM91834567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e98fae412caf13f5bbc1d8e517a23b124f5c1433dfb84ec020842e4a41784a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM91834568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8afa70b321bb3e2c39868b725947513287bf4971df67dbadf85711aa92ee631. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91834569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b59a098b586d2f960bc62c9acdf26d709e7131eb7087ca9b51010a4c68927b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91834570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64d37192bd1a09ebcd76d598b00eb720cad00f540170f88386aa0dd9a73ab81. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91834571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac37b3a480343ed0f2d3e6fb571e67d1e57a8c1ca40cbc26ce28c477208a048. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USHM91834572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de148aef26119178689c074cdfb19fab81a60a6af8f013e4235a859d9d6c6be. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM91834573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247e0df075bbd4aaeec00f419d9be9e33f0c7bb66ea4172a86a1fd287f90b75f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91834574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcd85bfa1433d1cb98fdd6d06f623d1b23b5ae7c45cc81c1ceac60558815bf0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEPI82012228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1df4237e91d1424862954d73b7665f587566ed1ecb290b65cc3e6e7290dbc8. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEPI82012229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479bf43ed84a047dbbb8862c83a8abeb6fdce2a7f636ac629878a45ff680ecc6. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEPI82012230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56681dc0cd22d3e9ae2ff9b48e93ddaae78c1bf0b5180daa86d1a3c10d12d9bf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEPI82012231.