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 0x086b675aa63c3b19d2e4a12eb88a537a7d330822e548bfb94ae0866558d65f08. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d04a0756-6564-424e-9160-7f0b9301b171.json and https://artists.proofprofile.net/proofs/artist/d04a0756-6564-424e-9160-7f0b9301b171.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 0x4bbd9d2487ccb9c6e56b9de73cfaa94f966b4c94b7fbc9d91296e99833fd6abe. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:13Z), 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/QT66K2523324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef344aa435e8ad3c71dc212f78fbb8750a5c18e2ce2f56785f2fc7d4b4908df. 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/QT66K2523339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f610750496be0f6cc883c9aec6868733e3b939ad9617ac6b0e93d4625c23aae. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT66K2523341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e10cb1b057ffbec0cbd60c843e3165fd66dbc6b9ff4e192a0f4532dfc3c4a84. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT66K2536351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b5c53d29efc7e3657d78055d76de4c4cfb3069b1a6f7d2f78d31e2b6c2d87c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT66K2536359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e03932a55479c9a17eb92ec02a89cc566e9e36a9aaa74733e0b57080eded1f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT66K2536360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa8806ea3837ffe9e0bb31543f65480f1c7fb30cbe8eb0a294ed4803520d4fe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT66K2536361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09384e3ee37d649d36ca034d7445f54b8a6229c92b18c3003576b1b4519ba38c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT66K2536364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe16d353348b0695cc7308c7b79b00ee7d262686bee65542835e45f625263c00. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT66K2536368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ad0b7a3b20f3b6bc456c689422eabf76b8149ae7080cc6e3769b26da16e940. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT66K2536373.