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 0x0966e0decf25f73b97a293199d541535c1fdd7a4ec0ece9936e0fe29f8ca5ae4. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b13482e1-8958-4b1e-af02-fccc404a85e9.json and https://artists.proofprofile.net/proofs/artist/b13482e1-8958-4b1e-af02-fccc404a85e9.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 0xec02034596bf825059a343e3b1fc8771178ef5ce1df12a4205486059b3e858fa. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTPX2402304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa158bbea39663f561e1acbd140cf6397a91151f12881ed90eb485b083f48274b. 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/AEA3A2316936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa99ac7f0839aabd9c82d121015990e77115e420b11d469d37959499ff66727. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BK6MJ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbdebfe43920f41819c464a3b9bb62948054c947106e377d6f3648b070b2c24. 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/BK6MJ2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7379b9b426fdd8640d579c9e85f818e2acb084aa0f0b27002512db9e670b27b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BK6MJ2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9279b74a6a75ca7b8f2f46349da2598eb8364c3ec0cb28ee3191ac73b4b0514d. 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/BK6MJ2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b7d4e8bd0e43675a1e0ae8d75059dc1edb2b0748f7a7c5422935c5a83e59f7. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/BK6MJ2500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e21df606a115cbbcfeec5d8e3210f91abda3050fb3fe2128016ea82fcdc41f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AEA3A2101254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d0d7f1f7266e3a6d01c4a49e5842a5788368f82f4a79516236d66ae5af67bd. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/BK6MJ2500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10ff6d7ee855b2bbd211febe52311f8fe19f6e53163ea5c7dd586dd53911cd9. 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/BK6MJ2500096.