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 0xb31c99ec940d3aed408ce57e6194ee35965573437f67a322aa9619f113749811. 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/318af619-5a31-4abd-a26a-68a730a3d3e2.json and https://artists.proofprofile.net/proofs/artist/318af619-5a31-4abd-a26a-68a730a3d3e2.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 0x0b3a17e1cecb8ac815e75813e68344dfebd8470a8c37c0d8f72ee8738a34cfad. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:48:20Z), 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/USCGH2229577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0505745348b04a6cb9f673d4a067dda27fd2b82a1d9da51180acda9ff5fc573c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USHM92248293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de08a9ce130c96afb607503df009e56e7192009c193b3e13bdfcb9f6584f05b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:36Z), 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/USL4Q2353846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123a0cd7f612c3e5dc052bd6b2859923f5512dc3cd4bed8826ba26198ee5601d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:43Z), 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/CH3132419074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905c5d8a79e2cca67a8a191f242114ed0fa0a11a0fd00440e740e81475dc3df2. 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/NLF712407715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d8854a970c80f69c0040dd1c8a426e8422c0f83ef64c42ad54b75aa5c41c50. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH3132419412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4c4a758af7d5906aead9948c53c0ff2dc4ef196a7f92c731f3f8ddd80b96b4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLA552500894.