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 0x43b0e420a475ca8553859e2bf1aa2dbefc51b90567a878e4b2b938c092e26153. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c2b2070-aafc-417a-a725-ac57800ce695.json and https://artists.proofprofile.net/proofs/artist/6c2b2070-aafc-417a-a725-ac57800ce695.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 0xe0a9563a64a0374f147372652611db577f276551c4a38ded1396ac88afc9ab98. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:49:26Z), 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/QZZ7T2573616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70dcfc61cb308224ddc4eede6f5e0d0bb7141b19ec9baba557f83333e236378. 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/QZZ7U2535104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e6f3b280a43e8236ff96f95cdc81586828fe9a1228389c935481b2567d4e3d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7U2535105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094201c031c86276c4080cbdefdfad2ce82f5275ae31a7165c2baf8249c1b9ca. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7U2535106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001df694f879c89a4cb29589c02059073cf8d9671f4689cb221b9f31e350fd5b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZZ7T2573658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ade89c3bba909889221aee9d293cfe6243750d50cd636405846defe988f5b92. 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/QZZ7U2535107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcffd951ecfb0891c66dbb8d5304630f00afff8a17ea5b226e3958bd9bc4a21c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZZ7U2535108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f32b3ea9b405969453110547b984263e347afff7da847f7c1309356aa72dda. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7U2535109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957d6c456bdfc3fd8246c350312dd33366480c81699a01e95fc8ab1ace54f5c9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7U2535110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daa08a0bb508b6a00d63b703bd7d830ec7839ed2c8ca2b03c759fd8e9ee0576. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7U2535111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde711f0a879dc3cd708d6279b599257361792641e2778004e476bc12d34eec3c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:51:14Z), 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/QZZ7U2535112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9563a64a0374f147372652611db577f276551c4a38ded1396ac88afc9ab98. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:56:48Z), 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/QZZ7T2573616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7cea81442d8e3660e7fb1f436b14794b6b5f8d32b5ab22c4f29caa868c4a86. 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/QZZ7U2535113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a0964e430d2ab0ad6b3f0407f5f1e09de951359ab310d6d55d1a9500f20e12. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7V2556782.