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 0x74a68e873ca324bfb0b6450ee495e0d819ddfe97240dc3f77e0cd9acd5e16551. 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/3a2587a2-4382-4c00-bbef-1b40ab84ccea.json and https://artists.proofprofile.net/proofs/artist/3a2587a2-4382-4c00-bbef-1b40ab84ccea.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 0xfd388b9e0db55c6bb0d65d631551fc4b7075ee1d728d6d84516f12da31223e3f. 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/QZTVM2328446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9745bf985678758aea1a3b9dc411424c0e5d1da2ace02b1f37b3527249a76e15. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:42Z), 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/QZGLM2435400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fa24d59e72d497ffcc744699e56ce7cacf912355b6c9efbc73ead01dd21dfd. 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/QZGLS2466053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba018d3938266de2d8d18a3c2350aea626ca7c9b17133f71b79a866ab4436a4d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:28:35Z), 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/QZTPX2449645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b72cb91df5e8ae58db087856e19f35dfd71a06472591ddd4ca2e2885fb6355. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZW9K2420449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f0fb6dd5ecdc783f891dda403b9ea4425e102f87b5568bf69d2d6cee67ed93. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZW9K2474968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee92c0a409b76bebb61814e860f1bdd6091fb5d7631f9e906913d4401ce698e6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNJV2538096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c69c61d72350681bf4ffeac3b3f6bc6316322d00c356a46e944451199df35e. 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/QZNJX2546749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75711b624b1a516acbaaefeab78980cb640c2456260af7f3425deeab425a8d33. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:35Z), 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/QZTPX2551523.