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 0x8c609ce368586e1c9ccf3cdf54ce982f1290e6b3f4f4abeb0f12c84ad3e90021. 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/0ce45bf2-6165-4b27-a550-d5078f3a498a.json and https://artists.proofprofile.net/proofs/artist/0ce45bf2-6165-4b27-a550-d5078f3a498a.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 0x8e3ff4324f4b5d3826e5e6495ea925815fbaeda7b0d3e47478bd20ff0bd120f7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL4NL2132140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3beaafcdc8c3dcdd3ef4c39310244ae8c5e96e1c19921b96b2b14ec5f505aaf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRPZ92341310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8306933bb2333fee8a84ab82b16cffbfa65aecf4e4ca0249b3bb3b1e8b5599. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:06:24Z), 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/FRPZ92427170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d19af1c82a0a1ddf2985dbe30cd9702f14824c75be8f134afaeb9e1f2ef503c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRPZ92442210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d54db1aaf99194b04990d10b7193e488e9784d966fddb7eafcfbaf74d08ed9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMER2371858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d54db1aaf99194b04990d10b7193e488e9784d966fddb7eafcfbaf74d08ed9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMER2371858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5be8182db4063defc60154583d34374e91b638d2f80a61d14187e86c8de000. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWT2303075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9ebaff827039135a95810269b89854ff5090808d5f31c9a64ee09564c8b15b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12011330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9ebaff827039135a95810269b89854ff5090808d5f31c9a64ee09564c8b15b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9W12011330.