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 0x3237d845f9b3109fc8dcf34664bbf3a5b04f99c01c14ddac6e90378263f10fa5. 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/a0b4d7c9-0c78-4f6b-bbe8-6d573b4bf01f.json and https://artists.proofprofile.net/proofs/artist/a0b4d7c9-0c78-4f6b-bbe8-6d573b4bf01f.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 0x76b213fc6955c755334720eec2d884ebbdc194501b094721070e9ab5ebe415c5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:02:58Z), 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/USGC61300394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e0b46bc2d991e2e023737ed84d0e09e2bb618997546f0b39093fb50509c522. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH1679099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806491ff48d8907b1fe392277ad83480080902bc40421bf69c17dad68d7e654e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USCGJ1648806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4ed45c569b4116a5d5220183d4150d178b0730fe324a6d5cf951e3961c08e5. 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/USHM21777773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba7ee84abc2c4daec201e361a9beb8fd11d689abc56b0e90d57f80a42701a45. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USHM21873285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a96bf496284e7d2d0b995cae8e184b0a535fca986ef8f85d23efba0666722d. 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/CAL451961901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7897aff73aef7ed13addd900d994511570c2db9b7a62b63cef594a8918984b2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAL452064803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97d39d98de856ea16982252542edaf8fd60a9467b865ffb3b8b93a6087b0a5d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CAL452064805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cf2e68510b599571db7692c189cca4af9580cd4549096a59fcf4376d7d3b9d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:24:37Z), 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/CAL451960901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07705b86906221fad0cab3b896021e3ec32138153aa81b2082732feb954d2cea. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAL452065401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afba8564d0852fbf5106ed6ea37be131f38c8612992e9ef49170eee2dd66bcf. 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/CAL452065801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660a66f54ba134ad8cefaced02f5d6d4b1d1832885729d09325bb2e8a7154060. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/CAL452064810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f1fb94174970e577ebe373fd35a1779eb2d8a7dfd51fe9501eaab2fda05222. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:09:08Z), 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/CAL452069101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e102363a9e11a6df04fbaf35ef913dec6b2e88a15af78e80ff059ec9740367. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/CAL452326001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06194d9534586ee74e8413018273f3e898b59c3586d5adc9b235c65b487d861. 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/CAL452214001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0b789c5c81ee4931b17c9915adaa826e368581aec78f263260e4d819eb8a7a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAL452326611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce215703650be4145b7c4bcab8cf64a853fd07611ce2fb59e3ac4722d03f97c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US5ED2406611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6609827fc86946e6f18e5f4c70afc3d86a67df8e795a75ab5eeeca1f1c60d21c. 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/US5ED2407246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a17fd7e685a38fa99e3aaff47de35230a09e7724d5f1ccc0a8ef9e67bd11df. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US5ED2407248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be3d15963d1b2026e53b81e4c8812190ae607243afc800e47f59dc76e187ae9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US5ED2407249.