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 0xa2ae409e8d1a4771087c49e24ba5d4477d37ce810d4c225c5d5f17af40d59e6d. 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/ee678aaf-d5d9-4805-850d-c553e6c8adb3.json and https://artists.proofprofile.net/proofs/artist/ee678aaf-d5d9-4805-850d-c553e6c8adb3.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 0x30658837a65cb6235f258ef735ba020b8947145940a4d1b0a834ef76383938a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYX2183609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd901ba292a856778dd774f4dfd2e3e0a841111c55641320b23c3a55ca573f1f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYX2183610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218ac9d33cff1ef8df52468124e2a34e4b38b1dc4a69c33d9dbc4c4dd4e76f46. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZFYX2183611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6bab9931ed3668dc2389753e9e281f5981de98a730b05704310a4f46ec02e9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFYX2183612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f0986df45267bf006ed792bd69033ced648be368377b2ef36714b57a3c62ca. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYZ2185285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afd8ef054662a32b865c668db04db996b931a96d0ad9a7b1fe2aa99643b6a7b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFYX2183615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ffc9d5ac6ce273dad31cdb304e74f4f6b1b04d9c5a34c661bf2bd02c5a9981. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYZ2185287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aa8f6523830040b62177edc3b992a162acfab321da7bdbf3f17b31871f77e3. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QZFYY2166919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08706f38affb07222c48dc585998004fbaed66d69d72f7fb80df56ddfd99929. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZFZ72461102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fca061dc082c46db91a57acc89ee19db58d1fd85d2f6efeb9a2ec511c1e6ebf. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:16:31Z), 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/QZNWW2590170.