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 0xe3f0df3580748769614c7f198ef647dac6b64ddce92e419ab963bd1571b75e13. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87c1c754-4a56-45a6-9f55-219b30e0a51e.json and https://artists.proofprofile.net/proofs/artist/87c1c754-4a56-45a6-9f55-219b30e0a51e.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 0x8b9e6aa690dbd8a130c627727fc1354ea2026ad09b065e25d57c535bb8b23c31. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/UKXN22381505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ee9d9817d19152ac8ad2f4251fa41b98e9811be92f77f58649e65bcc866981. 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/GBLFP2409175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d0f1d7783e21f29e732726000c387686488834a7e3f678ac9c90d8b4d2c8ab. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBLFP2409177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15073cb6f34d4ff9de08720e2fbf38c8ed4737081aae69b314bfeb33d67417c6. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBLFP2409178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4c3a5e615227023b9f87925615b15dd28759160a511f5d30ded8847458b0e6. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBLFP2409179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89abcbe94fca45429871c97eac1790d8cc9593cb96fc8196b1f4805bd45c773b. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GX3Q92412477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73195dc4ef6128e9c942753450a5bc3b46e6c8d02646799fe7160b04911ad73b. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GX3Q92490919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea84dd41a15359647cca517c20f34f8b448cfbb5b49e192705d7f44081429ecf. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/UKXN22432497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1892bcbfbec789df4c98eaf8286e8bd279f8edc93c29e76da10de428001ead. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/UKXN22455421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba1a9ce2899028a1ac7c03f8a2fc1bf06a02bda4b4f9842ec137751ed657c80. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/UKXN22455281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6bc7085fc446c0355714968b5facde1c1baaa64a26fadd1601c1b7be40f004. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBMA22403279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d1a9d7ba20da2aee7e04259bcb9ca1b117ac89c04f574509b05defb52abef. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBMA22403282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a14861b2acf93a505031b0d38b7205a8638d9c5b0d0fa3506198cc6dc40452. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GXF9Q2545217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8610ffb18a1fe3654505de2eb61c73b9d2972d37a22123c2808041f9fa028f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GXF9Q2592470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3326a8bf480057fbdf36116fd9a2f9f3dc321d4262048578917094dc9c2641ef. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/UKXN22598857.