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 0xe52f15ce4f6f62c6e48a9c2c8c1a768b4fef04b6cfe248d0036899c39074563f. 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/3efa6234-5325-4bfe-ae47-3b598ef0b135.json and https://artists.proofprofile.net/proofs/artist/3efa6234-5325-4bfe-ae47-3b598ef0b135.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 0xec871afa17cecf5a1d3e1d016b9e13d72a8ddcabf5cd23ecac885d1e300e9980. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEZC62573491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b96a493e3420ea5c27f7c0379463dd784b1bd5edd5ccb3bbaf3b8a6158a3778. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZC62595386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056d72db14c5cefdfb26a3e4cb8abdd47b1834e9727a7fc509b1fb71e0799c19. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DEZC62460298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec871afa17cecf5a1d3e1d016b9e13d72a8ddcabf5cd23ecac885d1e300e9980. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEZC62573491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dee8af913c9866d1fcda7a3c088f0bb8d32bee98f56970d7f14392f10e51617. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZC62580185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d11138daef3ab14469558290a7a32643f26832fd803cf43c8cad1e749c28e27. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62587256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a6252dd5f52d7aa85dea8e52d626b60fd0009112fd88095d53b093a9a5e199. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:13:15Z), 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/DEZC62536700.