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 0xfbbf19eba75aa5f48c63cd258ad2f0a48bc475f8154f8bbc015134510160c34f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faa04f04-8be6-435f-a6f1-f3369ba3f7e5.json and https://artists.proofprofile.net/proofs/artist/faa04f04-8be6-435f-a6f1-f3369ba3f7e5.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 0xc4f93809db03db1f2db69943fe0811de9cf1ac1dc7bdde84c479ca3450d7b02b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:31:34Z), 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/CAM460416203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f3e748ca1f66a59d29ab91c08675e4d24e5296b43acb1cb0c2625c494fa22f. 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/CAM460417471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b2924762cf46a9183b54aa007d2d95d8df15544865fa9d21599e929c9d0a31. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CAM460414998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8b588f5057ae94b39dc71f94354b6e9ee531d025df05135db333bca7cdae26. 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/CAM460417466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1b24414fe94951c70d3ecbb9d1bb1ee01de844aac20cf1b7eeb1d101d48905. 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/CAM460416823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83532de48807d6562dbd81841249079421401e9ed7ebf162e3525ac67055bc4c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:31:37Z), 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/CAM460400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e752da2095556de579f5942361556f15be6e1e7bfec87a93d496a96d3717136. 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/CAM460409700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea30ac8fc3f21aba3a2841940354ce9a827a07bda67a26a85becb6b903fb95e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CAM460417452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4804bae81ea8ca09a06c2557abb4e5255d59321b59fb3d186fa59f55158bb413. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/CAM460435891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31298e874171c4a9fbbe92a02bc9c91c5bdf101c536471bb05d5da48189649b0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CAM460409702.