thumb|upright|An 18th-century Dutch engraving of the peoples of the world. thumb|A stereotypical caricature of a villain (i.e. generic melodramatic villain stock character, with handlebar moustache an
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 0x2545b04fbd4a8b1fe02dd8fd6e4c9debe3af48fa2f91c384c77a9fbb0122c854. 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/cd57b48e-d9a6-4c94-b8cd-3a3eb0876362.json and https://artists.proofprofile.net/proofs/artist/cd57b48e-d9a6-4c94-b8cd-3a3eb0876362.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 0x07b1ee101e2d51f2a7086c15d011fb53c7195cf399ac855318175c00c39ab7aa. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/NLFL71700600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359214af0afb21862d9a3c31d748b63b60669e98054b8d7346c9b76a3b708716. 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/NLFL72000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286b22ad58b5f0a09660ad9b3c1d48d52e1ce009eaa32045176503fe4fec75d1. 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/NLFL72000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295ecd218abdf1e59138e3bcddd5c06f1c8fcd2fe46e62e41269da4383df3f46. 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/TCAES2078308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef056b8c72173b478ae11c1d3a8d9a35402a675da917077cbd8a264b3b46d1a. 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/NLFL72101056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61e48f91688ff79f52a19f5740f3653038be3877f5ebe7cdd96346e3c43dac8. 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/NLFL72200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a65eb39b6df266ea5e7b47535f0e7fe7665ce9597a4d33ac8e12f3036f1d4a. 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/NLFL72200549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7733c5165cdbb47ca0f12b96fb9e30e5a571753ae76e2cdbfc76b101e1d77026. 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/NLFL72300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f51a12a266472019ec9e06c8e7d0ce60cd1df2ece88502ef49dcb0fc3a92b98. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLFL71900179.
Dogfight Hardcore Vol. III - Ready For War
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca20a30b59f8a1316c155e1190dfb6ff74523165081c9e1a8b5d13d1ebd59373. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/NLFL71800761.
Masters Of Hardcore - Magnum Opus (Chapter XLII)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286b22ad58b5f0a09660ad9b3c1d48d52e1ce009eaa32045176503fe4fec75d1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLFL72000027.
Masters Of Hardcore XLI - Vault Of Violence (Mixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50acf7e23c9e638028b9557867427dca36e5afd8f0aaadf16e480e5b1b0ac60e. 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/NLS241900101.
Masters Of Hardcore Chapter XL - Tournament Of Tyrants
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b1ee101e2d51f2a7086c15d011fb53c7195cf399ac855318175c00c39ab7aa. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLFL71700600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0f1cb3f8d3fba4f99100cb7c4aa39ec3d32d7e6a14438a6cc9ff7cfa81156f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLFL71800767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d173bde96b9cb726933247f06446717ae59307cf9b064268c7f657fa5b2f8c. 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/NLS241900239.
Masters Of Hardcore Chapter XLV (2023) - Cosmic Conquest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546263524694f74f90f0df95b594d1aaf67d986e452757dec7a0ce884249c829. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLFL72300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61e48f91688ff79f52a19f5740f3653038be3877f5ebe7cdd96346e3c43dac8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLFL72200023.