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 0x9a9528472f34ee67eeb87fdfb76345619490042c85dd41ddaf183cee7dbd0b4c. 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/2fe93f3f-a79c-4bbe-b130-76b6443f1d90.json and https://artists.proofprofile.net/proofs/artist/2fe93f3f-a79c-4bbe-b130-76b6443f1d90.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 0x394bacdcc03be8b054b600e7ccb0c55d7819fd108b77545668bbd691267b14ef. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GB8KE2305880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ea9196113b0c18529ffc41665f3db5a8edf8bcd86e6f5882ffc6d6216177c9. 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/GBKQU2357220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d71ca9523e67b5f7d75e80abefec6be87083a69401f29b81ddc665a40f64958. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GBKQU2357221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2694e6dbaa5cbbc369db2f6ac401de51fe4314dcabd5abf5af9c4bab4766240. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR2361582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e836323663289a646cf22b9344ca4ea35ee77624907db379fd6bc0b3c2e6f5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2361027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1370563e90252135619841dbd9117f917f435a6f79abf0080662b70a1be3ea. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GBKQU2386242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b18fb27338237593a5e7ebe15ffc8bb4d7258e30bf4025ed8d9fb9b58eebcd1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX8LD2437663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b29aff2fbdb9859231514d51baa5751658076d3d48c9c4eaa24bfb4234a317. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX38U2449242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73712fc2338c09d0384cc5afe25fbad1121ecadd8044006912d3e75690ee1280. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GX4R52441483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4db1d1bdde0636054d1e078a02b437b48d6eb58c02ba1cddd55bec775964e23. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX4R52492082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4d4fbe397fe2d41e76e9bd5b164be07c69ee66a12bd7233f1fd5822419ba5c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GXD7V2263107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64402d3703d8fd3e43fdbf46900294a2dc24e36a0b8baea5859909ff5b49222. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GXF972475780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd08cd59efe15f264935509e44ac7bb80df2d6b5642892cf97c403691839b829. 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/GXF972416197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81606428ccfc49d7a27cbfa2718e0047e6d06cc4e22ccbe0357cc0b3faef5b95. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBLV62418182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aceee4c90f0200bb7f710927cc5f3debfbffb52b4c441a82edd111f1dd0367e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBKQU2508926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dfe06c29a9d1608eaa2a22f032509fc556fd37814d20d0941b3b58a88a39f4. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:06Z), 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/QZTB22544048.