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 0x2c7982dbffee9bda7df3b3240e2c4133edba4b7860447b5c2009151f1cf883c7. 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/a76a58a5-1c89-4b33-a154-579cfe0bdbf7.json and https://artists.proofprofile.net/proofs/artist/a76a58a5-1c89-4b33-a154-579cfe0bdbf7.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 0x86aa763c8be5ee5515580bc9a1e34d7025a879fda7ca754d8e9936466335ed62. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLFL72400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ba76b50104ca2a04ee8e9e939534f65d85de90a085968a1885fe2cc6117891. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLFL72400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a63bf89d62b2c5e3b30f385fea0e5ea6b81d375b9e9b67072a7bced047cc40. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLFL72400099.
Dogfight Hardcore Vol. III - Ready For War
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00049932326f28b948fb834703a9152c1cce94fd4446dae25ee8e9165b2ffcb3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLFL71800773.
Masters Of Hardcore Chapter XL - Tournament Of Tyrants
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c89b0d004f143d56b8a9af8e9c93d7d7be1a3aac35832d5cbe452bd397cd991. 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/NLFL71800122.
Masters Of Hardcore - Magnum Opus (Chapter XLII)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804b182b28dbb0e3f98861ee057cb564a1b41ed4e4a8605ac7ec914ea289df7b. 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/NLFL72000011.
Masters Of Hardcore XLI - Vault Of Violence (Mixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495963701676fd98b024e0bb1d0310765fce0a7129e7aaa22a7affe00744d02. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:40:10Z), 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/NLS241900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483c9a2d169a4860ddf3cedcf7f5be1b4e0bd8d428686884cf93e77d9114e190. 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/NLFL72300641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b57a35bbd2f0df1f8f6fceb30f301e2c8598a92ebe7d24f89d45351845e5335. 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/NLFL72000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01df93f73c3a0c0328ce8c03f87e26a6bcd65357aadb8e6d103517babbcdc05f. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/NLFL71800993.
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 0x32735d97221c2a653989db888d9caac17ffeea8ad42b25c688bff2fe94585b2e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLFL72000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288338d3f5709c8632642a57e1e6c98a086866f87bb714c27ff9c5fad4b10e16. 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/NLFL71700618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27609547bb0e9a6a2de8d65e25702ae43fa1364ea3cb2865f72f1b67c8667cfe. 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/NLFL72200277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2407f65ddbd10ed6a219d818827b3fb1ce612dafefb5f17ec1a1695c852b3c48. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLFL71800692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da4d45643c1ce425671da12c910f49c8e35ada6c20487b7622c4bc30585fbba. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/NLFL72300101.