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 0xa0f2a574480f3e659c73dc7fcc80a3e0808fa9cfac433fefcb34807eb75dbd4f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09e8f6c0-7531-4efe-a549-2c99c8829d63.json and https://artists.proofprofile.net/proofs/artist/09e8f6c0-7531-4efe-a549-2c99c8829d63.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 0xe1d241d4937bc9e8ba7326d9df2235a544aad80c9f4b8378a3a854d3774b02ff. 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/NLFL71800925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bae33c87059d4f30d22646e3ef76a8e1c4150dd7a7008f1297ba198b7fdeaee. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLFL71800912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f3397314b97f36d9b4c545c3969ce93ed01b6571fcb550295eec1535af740. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLFL71800918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6ae4592d2fcd89170cc2284fbb3acc7e76c47277bd958ccb24f060f1de5382. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLFL71800919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1375681aeacf9ecfda202e3cb52fd8ba2d127447e2e85779da0974eccdb7375f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLFL71800524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca4525f41498073de1bfa2c66e8c8f1d277b8eac88e8a9cdc0d0ba691be61c0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:07Z), 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/NLFL71800921.
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 0x5ec0dbdd5d29c0f3db8585ccbc055361f260f5db0eaf8b80d63c03de3df78fe1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLFL71800913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff8d7e8abb33bcafe7a564bdb94b211212405bea3098437ee03c00956b71556. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLFL71800916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c4709561aecf58c135dc8059fe03e6903bc8ff4a6578be53052dcb964544c9. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/NLFL71800915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ebedda6ca0c39c035971034a266d883c57888a6b1aa2aa1336dae4fe6ef06b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLFL71800914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea026759e88c3fb5cc7fb5682e3eca1b908b7297cbed55dfcfa1071c2cf8e44. 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/NLFL71800917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b4729afdef92563d7fffa131447e706de9ab4bc9579104544ac0045ef595cd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLFL71800920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed77ee0c4a6b92571c638c179c155da94f15f6e37c42877f2f9cd274e384ba3. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NLFL71800922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7de453d2a8d7d556716b3d9c05826bfd2aac69cef4ffca878fb493bf535c7d4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/NLFL71800924.
Masters Of Hardcore Chapter XL - Tournament Of Tyrants
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3daca79c89d60c1732f93c722368e01d6202495b9ad86f049f1a3e7a2e0acf2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLSL61800001.
Masters Of Hardcore - Magnum Opus (Chapter XLII)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08bcaadb50ab6c9062684b3a0de3567aba99c65d2d60083127eb5960e3674aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLFL72000066.
Dogfight Hardcore Vol. III - Ready For War
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0a8198e9e6792407966a8cc47eb2778df7f8725f7f18bc9da4d580315ae4ed. 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/NLFL71800756.