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 0xd7be6761147d74610d96fcb6dfde59a32282c1679630b06cd952bd0d66864292. 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/a3b0fbfe-7f63-49ff-8eb1-1ce4d105187f.json and https://artists.proofprofile.net/proofs/artist/a3b0fbfe-7f63-49ff-8eb1-1ce4d105187f.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 0xbd581ec717191c54a6042f0fefbd30940c6d219e2b95a9cad9537fe09c7058a4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZPLR2284665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eec2d7cbc74b50648d6aa7007c6d9c557b4ff1e4db414b697e1dbd1ee1d0123. 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/QZPLS2283133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952fd9fc9808dc41425fbaee114ffa5ccd943536a890b170bc6fc05b8e201421. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZTBB2200712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2b54f15b208f2097c29cdfa0cae3b4c18b11e40a63832ac8cb01ff5c6f71d2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:54:40Z), 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/QZDA42474444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc021fa020d4568077780ae93a46c6443f2b96004f00469de78b38f2143775321. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNB2400509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8f17d61bd8fcf68cfafad392e2f4df1dc40356bfb4c03df52716b84253dbe5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZWFV2402342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63244c42f472de204faf1329b86657101e4c90f9e712f2908c2834309cf208ca. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZHNC2508421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c171be58524d55680260f5238ebc686dd70a1d50456724f0bfa947d1fd86888. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:58:12Z), 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/QZHN52530957.