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 0xca5494ebbc61c8c07c1af689f1422a4fc68298170f9346ee1cf7ad1827b13273. 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/596bb238-19ed-48a5-a6ad-a3accec96290.json and https://artists.proofprofile.net/proofs/artist/596bb238-19ed-48a5-a6ad-a3accec96290.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 0x0933e6e48991059421b35e0fc67b64d74deebfd02763ecb68fa4a2ae2c764a48. 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/QZK6K2056056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba01ee36cb525d2a91a210bc02c3273a8b8e341638a58fe151d46ee92dc74fb8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:00:02Z), 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/QZHNC2035645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dd58a70c445e892fb37b2af56ee5fc3cf0fbf5199fc85b362c1a46c6b55457. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/QZHN62004046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d7b899e9478f593421129f22657052c71717086b7c790cb168247392c9be57. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6K2056058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9e81194e837024374570f9a2cbf6f7642ff681215a244864ee24c1bc55869f. 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/QZK6K2056060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0688887cee594700d744bcdcae4564b6201055ea2b699bd82086234b3b2c85fe. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZK6K2056061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8fcace36fc254f646d5c202a7cbb02b3edbf049b8bdad9c53c5a55bbeac2d6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:17:35Z), 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/QZK6K2056062.