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 0x02a7091e2eef71b63d2d9f20c11fc57ff0bce411621ce872c59aa66fc9a7b1b5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bb8221f-f742-4e33-bf50-d28b64ddc344.json and https://artists.proofprofile.net/proofs/artist/6bb8221f-f742-4e33-bf50-d28b64ddc344.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Living room Sessions (living room version)
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 0x1622498db432542b3026418d59792221f34a82200569a9cc27f5bd53a794c97b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:07:17Z), 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/NOFYD2308241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9405b4d3b816fd4b22a0dd1790fe8f664b3cbfded5a359f6b58c0b7bbc2f14f3. 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/NOFYD2308365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dd90638a57452deff90b4518b1442c1064bd121c6404b3b5e6286adb0f4961. 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/NOFYD2308287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ad3f2f208ece99c609194189724be89d7ea4e9f6cb8ce87d95a1b381b8e3ba. 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/NOFYD2308361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768a893433def796ccea75e83af19e61c963e2c1b6af794009555000f755de27. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NOFYD2308368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f254ce46cbfb7515a41b57f47f460c763ae25806c02584f03cf9db3441f4e6. 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/NOFYD2308332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad5b9e93b60bbc59245f53a716d3a9e12fb50413ebf8c2c89bc0e9195a55af. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:20:49Z), 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/NOFYD2308369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90d75cdda31ea40a1a8a4dbb61d73639b83a1dc40ac95917d0ef7f0042555ea. 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/NOFYD2308370.