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 0x441bc817c25054c29b081c05be1a10e6c3db01afa455b41b3d8dab985c66bb2c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/716381dd-2c1d-40c0-8761-b1ba4e62f107.json and https://artists.proofprofile.net/proofs/artist/716381dd-2c1d-40c0-8761-b1ba4e62f107.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 0xc0ef1ec48b8e175a2c4b14697009abdc4fd48a490212174ed8d78e34540d1217. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFYX2536983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af08b7b6c2e48e20de5f24d191fa3bcfefd07b09848631da853759e8d66538d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFYX2536987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d8df115ee2ff1ee7cbe706cb3d78d61f6b5ebfe44d2bf77700de8ab937b170. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFYX2536989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5245a20fa284bcca6f93935bf938c2ac16aee62b4394a2a6e377bc5bbc10aba. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFYX2536990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c98a13375ac936b796500f9d5cd59a87caf2f82075840c5c0b57e660c8771c2. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZFYX2536991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f05ddc543e52c8e7e9276ea1820603f4e6e06ad6d4d8937944e611900715cb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:58:54Z), 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/QZFYX2536992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335ed4c6e01df4567d84310f9030dc18b330cca3c9461520cba4f4e5db6668a0. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZFYX2536993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ecfe0b59f12f8de83654edca491b07d541d5b650d04fe0169e6254ad874dfe. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZFYX2536994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f61dadc21dd35b8f594c1edc2f4c1885228ceba368705844a5b11a2a32fe1e7. 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/QZK6G2590951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d25d40bd2bc8b2f1fd5f0e22822ba4aff820a2ced8d76b8600856a2157b73a. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6G2590952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce02d59d35f5298e01ea7da53f01d16ab7e0b63874708b63d15f713f4c45f8d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6G2590953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f721f9f813eb95156be150c783db4ceb348c543a000f9467f08ce1c9bce81a5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:29:48Z), 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/QZZ7M2545354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1d4bc34defdd2188f17928048677ccc5262e667e39ed3264dcc547bf710028. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:02:25Z), 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/QZZ7M2545355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7f8fec9e761cc0900861383a0070820d3a2a0c9bc1dc94099c2adbd8f3e708. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7M2545356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce19b8c874d452922af6b2393acde240fc1e33605d69207afeea4a8455890ec. 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/QZZ7M2545357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4b69b96a1d3cd2b88da0ec08e9c5eb69fb1f5ae1422f8228ba513287c9483c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7N2536338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1da39fc1e501286c073eb25f5f826b9995e5f9bc738f4248319b76c5910a4a3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:28Z), 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/QZZ7N2536340.