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 0xbe0e12ecb42b36125143f6a1ced9ebedf072b30d809f0e646d6df0d30ce217a0. 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/aad120e8-7f84-4e58-accf-b5111acb1062.json and https://artists.proofprofile.net/proofs/artist/aad120e8-7f84-4e58-accf-b5111acb1062.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 0x39f86761d5b864e7fd306b20dea117adaa38bee79e556f20246cef562fcf23d6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2495023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4e76138d1e68aeac28268b2154a605044024b53911165102e8fc21070d38bc. 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/GXBAV2493252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116aa2335c67938b4a995d9dfd9164c1b7c526728620082af5e1a5ca9a933db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF152400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458b432daf7ff109cac0a8d0f7e66e0fd0d6e319efac44cfe7c8bd98d0ad0bf0. 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/US3DF2508448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bab4a2998f30e1051f58a82f11ca41703cf6ebd5097425833467f2b6092288. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0R2490852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83321e26e1ffb2cf6960f8387d708c1b1f8039cf05fd24893daf620d2deb06c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0S2460355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee44f3e0f356c839167834c3cb0711133123290ada0926df94b2c4ca8e9974fe. 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/FR10S2565284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a634b03695fc90b1f905a39e6cf8d3dc15ccbed655820d525cc0b80438b30d2. 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/FR10S2565287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cd3abfd4f5e43f32e311b759667e8baec0562e645957298f54763e53415c74. 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/DGA0T2456595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96c24aadc6a0e4ef4611140635b7e1452a0ca2ad3c65699af0966c529a0804c. 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/FR10S2565290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f71126ef477972d18079b174c0ad1698b2d95672ca596171790ad8adbe596c2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX202520570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2002e196e7d24b121554620624a2fcb26d2352e692765462b1096d4c4a4c0921. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF152500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83321e26e1ffb2cf6960f8387d708c1b1f8039cf05fd24893daf620d2deb06c. 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/DGA0S2460355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05522852a291a0642e4995e07310c9859940b2e4c0f7df73ac11bc316522948. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GXBAV2223580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dcaa8146ada9eefff6a8759e855998a3e189cc4ce0e8b47d744c2c8371792e. 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/USANG2287227.