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 0x752c17d643b3040df27baee6fc3b04ad812ac3aeca697185b77d0516fa2438e7. 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/4d79a1ae-dcf8-4e32-9f4e-b4779655dc02.json and https://artists.proofprofile.net/proofs/artist/4d79a1ae-dcf8-4e32-9f4e-b4779655dc02.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 0x238a26e42eb6b188f7b3663f5975c473760db95449e8531662adae7a562b9811. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QMGVJ1900258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61050d30db2d7a467057e3c22771fd3c94a017d1377e2fca476e9c33ab88618e. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QMGVJ1900259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647a872eac4ac22d3cbf951614fa03ff6253f85d659887a158e6ac8a38d65dca. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMGVJ2100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dd519ef177a53cf98861e1b19a9d748c2fc47746e9141df277e8a1873c0e9f. 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/QMGVJ2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15f4df0d85de46ff04465f22e80330b49b94d0f0bbb55243e0e82c3ec1fd419. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMGVJ2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4e7d6f9d12bb61f4173e6e4491e29a1b2695a4536bbd6b78115688002531aa. 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/QMGVJ2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dd519ef177a53cf98861e1b19a9d748c2fc47746e9141df277e8a1873c0e9f. 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/QMGVJ2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ac8fac200531400ab3f30b6195fbd5a91e9ca4577066e3ee7ffee8038e1f62. 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/QMGVJ2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f28b6e088c98afbd1c16357e58dddfa79e4c8b34ae6c78b9c69dbf2719af25c. 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/QMGVJ2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15f4df0d85de46ff04465f22e80330b49b94d0f0bbb55243e0e82c3ec1fd419. 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/QMGVJ2300021.
Mea Culpa (feat. Wolves At The Gate & Fallujah)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670c909deafec3e910df3f5b1802ed8bb91672820642627c8676cd3730d3df82. 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/QMGVJ2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ed0421fe3c57864b1f00931fb428749fb644a3b67e2b2d458b13660fe1b2b9. 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/QMGVJ2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f06ac15534e004e4588483ca7757c86fe41b4182bee23a4e0a3b0cb5a4f160. 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/QMGVJ2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e696274f2aab612f331a7c0dfb996e9b67c526f90a25eb59e3118cc8118bed0. 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/QMGVJ2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5127924a69c7e75f5ee6196f9b97074cea7648328cca126683e8f1d2dd3165. 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/QMGVJ2300026.