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 0xc8ac1deda6a32db00567e033752aee8e361ec82e3050704f6eb0ccf245541fda. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/441a202f-a45d-4833-a9e2-79c6e3f3977b.json and https://artists.proofprofile.net/proofs/artist/441a202f-a45d-4833-a9e2-79c6e3f3977b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hard 2 Sleep (Exorcism) [Official Audio]
Hard 2 Sleep (Exorcism) - Official Audio
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 0x13ff3bcffb932535cd25f7454492604b75c39b10d4af7f271202c56f3f0ea2f7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6N2333566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4357ca029e26f245bc56d090d2672269d698315290c82cd85de0ad85d8fcc151. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZES72384830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77786237a05a31706e2dd92ebb8fdf8f62197093c71da7edc18f5c4186db17f3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN82318861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d65bac651b62ef8b9bb36c61dd250b87d1b7822798cbaafdb47aaf9fb80644. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZK6K2421391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88cc496e1dd2fbcba6d4d64ac7966d9ef0d86f64d5a872bc8fa63d908bbbc23. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:34:43Z), 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/QZZ792483336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ffd78383278aa7f75bc09096d7ff5b5b3c70e01382d6e6a9e6710747c54f8d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:18:07Z), 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/QZMEP2541614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b03de1485fe4b82dba3d0ef4dc344be50a44cdf250ddc125bfde55a183ce876. 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/QZWFG2556097.