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 0x17bee39e6f43fa883c6f01a1e688281fcefa5c96d9556b4c6dbe9f067bae5ce0. 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/d88cd8a2-06b2-4f01-a9d5-3fdda34013d2.json and https://artists.proofprofile.net/proofs/artist/d88cd8a2-06b2-4f01-a9d5-3fdda34013d2.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 0x84e0907f08bc141918921163c6ef9a445f443bf3228741a72e09cd1d43c9c210. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:36:53Z), 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/GXD7G2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e60ccf4ce0ae1901350bc2774cca55574c5552e0ba57968cc408a6e2a7070d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:54Z), 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/GXD7G2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65031adde5f6de7334f311a5faf29a4d30efcc815e7c048ea33075bee7f6af37. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GXD7V2298625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6557ce3d853828a322571184e9f372a80963cb5f4306980f09cf21c5110a3683. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/AEA3A2340272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe5023b0c4aaae5bf2efb8b5a4e2a038e358bd697ea8c36322170ebca1f0c82. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/SGW502200386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a5295dd52cda82ec402dee11be4983eb7297d8ebf31a2d896df73b1f3efbcc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GXBAV2500838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0eb4b93f6484211444317c19b71a10cb0d36ffdc66138b7a6348fefdfb3137. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GXBAV2547266.