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 0xff65a567c2789d53cd622ca3223a0f06d5e1ff9cbb981f6ea62b3b958c7abb3a. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eef5a7c1-d797-41fc-b92e-e3a43bc3f7fc.json and https://artists.proofprofile.net/proofs/artist/eef5a7c1-d797-41fc-b92e-e3a43bc3f7fc.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 0xce37f06800b417187c98da76f2aecc86c07bd89ae47c256c9d1dcde232e88366. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ5AB1720811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d1bd005ec14b8da4a6802d4854b39dc2d1f11df3f10c545dc5f96a67ca02ee. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:12Z), 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/QZ5AB1720812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbeb3332d062ce37a6a1b1ce112705b07c01d1fa22c7809796554f9b1e766b49. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5AB1720813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32881a27c5c658cdbc4a2b0aa99e2370c89c78319f5279e7e1100a143d5d7c3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLS2094280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9ab83f1469b155e7e618b84009501226f236220661ebf9b9278b00b96b25c3. 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/US7VG1993752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25043cea2603a2229899993e0a21c3afa4c0b735aedb9df5ded3eca960e91bbf. 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/QZGLS1922712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599128c4b630b5c75c43c325c505c1de21f7f684f77b62403a1c5df784ea3a51. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:20:55Z), 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/QZGLM2154631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1009a7447818818e36c18331e8c0928013a61b56694a2af34e69e2a196f638a2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BCKVY2100001.