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 0xd20c5e2289754c9229b9cacc7af57298157e72fe4641d1a1806182722d52121f. 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/5dd748ea-471b-4e5d-a01e-f6d7b755bef4.json and https://artists.proofprofile.net/proofs/artist/5dd748ea-471b-4e5d-a01e-f6d7b755bef4.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 0x1e5c15f070fc020139034ca68c51b260d23b7ce72cbf883cc08d8b3fdadfad1a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES91851664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87743253cbacd6d9a71618c2d3ccd93eaf4bf60cebebedb59799de4b4fcd7583. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES91851665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2719265afe08cd73381f9b396ac34c88b068533eacff5fe2e792290b1edcd4e2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES91851666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf194f7b5f783a74a3d9717a51fe76fe0e2c659551f113a68f8d1bbcf4f7ba46a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZES91851667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499069c073fbc353b69426b35653cbe97d5c606d1415bb1c1b1e852f4f324e21. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:37Z), 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/FR1PP2000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd818e4484787002261361d7c0565fa66b8849e1e18a1a75188505755b7e781f9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:21Z), 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/FR1PP2400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb168663afdc0b73ac4562f19afaa6662a5a9162c27d99b1ea1ac4b52ba7401. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:46:59Z), 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/FR1PP2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eea3cb07ded36a2a0d2d785d1891248d0cd5e75fb77d1e1aae1d820d0ba705. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR1PP2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936e7639573d3f35d26a5502287619030239b70258e30ca0375316a881ee781d. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FR1PP2400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573f216faa34a13e79251e4f3b26c40e8c3bdf2ea93ea3a9c74adb2434e4e695. 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/FR1PP2400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcec93db4578f33bd4f650634e352a47d7d9df40c19e99816957f979a9401e8. 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/FR1PP2400220.