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 0x58f059c1fb90d02459b77a68eaa8e91fe3aa976d63053d65d7e369c0eb583e10. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40639a08-8fd5-4a70-b600-5030b3d7ce44.json and https://artists.proofprofile.net/proofs/artist/40639a08-8fd5-4a70-b600-5030b3d7ce44.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 0xc749db27d88c5ee29d90ed19c8ba7514c9ab1850a839dfe562fb62ada94b17d4. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:45:42Z), 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/USCGH1710061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1695f1ce565b604b61cc68dcd5f3250c64b22d2840272d13cf9fceb12a6166d4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGH1710064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725bea1a3971c86f5308746be169477dfef8071eb8832226530cd738705db32e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USCGH1710066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2476daa77edc3086f389493b7dd0870f7a965452705330b00475a97da34e611. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH1710069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29db8c382af955f0fe0b87baf9f6d66c8be8e1315361fb624ca533d65728cb6. 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/USDY41995140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1769a164fed15aa5a44183dd30be529efe088ee020fd76d4d418bf41dd86bf74. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/USL4Q1909121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13212b16988c2571a5c57df13601f6a5ff70f3f768d75332202c6681dcd82abe. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USL4Q1909123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa7125442626e7c724a37d77e42299e33d12b133170213c170b85fe3a0b6a9c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM6N22265061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad1949b73171260fffeaad6e77963675ec3126e8331f96f46011d072e338c78. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TX2272745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bdd71380e68dd26865361ffd552535b02c7e9df2cc441c587a005bb9d1857c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:17:10Z), 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/QM6N22265062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71a638ce5ff500b94e41a5817708261409da624b47da7840bca4bfc49722a1f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM6N22265065.