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 0xce222ad04d5f62e2142d0c0b185221692bf69af3a8b47d40d84e32df2dbde2d6. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1845da5c-5615-457e-941f-da5c2e503918.json and https://artists.proofprofile.net/proofs/artist/1845da5c-5615-457e-941f-da5c2e503918.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 0xe038b4cb79c7d91e14dc1ae291f316f5d33b6d6c34279db166f3628e395b318b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNMT2463079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cd788fd7b121d0851f408c0be811ded8b4b441609fba270d6e9478de69a236. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZNMV2449463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35c265b74d24f3526d5cd2efe5c18d07a3f8a83440228c973fa0bb147f6fb60. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNMX2495376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb90ef87a590bedf365f5586656cdf7a5ed5490edb6ff5094c7b467fd5054a19. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZJG52551917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cbaf218a8c7c06319989211ff545ebad9bedf00f57442be21b849afdb7ce81. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:14:47Z), 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/QZJG52551918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc99de2534ba26785e1a7b7cf92e8a5708dddb1ddcc8f728a733fdc42f6de088. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZLL92593496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84928bbb48e30b2cda91c16f85886230734c246263137bf4152ce2add28ba84. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZLL92593497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc128413576a6602fde99d13ed961b4007e0c88bc63c0da0ce4bcb1c49d709c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNMU2557836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e5a708a5a844e210e6eedfc521bd8a223003b24629f8b227ac9df1207ab45e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:34Z), 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/QZNMW2571857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb39dc30ed7bb305a223bf857737aae1df833f826cc6436e047beaf3670276b3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNMX2554291.