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 0xe5bf89bb0a7168b3e3312d7e6259e71b6f566d88f8fb57fb09123484fa31c983. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5bf1a36-b1bb-4c10-a246-66f9d6f867b3.json and https://artists.proofprofile.net/proofs/artist/d5bf1a36-b1bb-4c10-a246-66f9d6f867b3.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 0x0bd799a0bc7b5b165e97833e89f04459624d58122c8bc36d46377be7b47fbb36. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:47Z), 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/QZMER2316835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9954354c2c85a210b85bfafef9e968cace7b17a917c637894dc6ae663ac0baf8. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZTB42354220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cebd4e73aa287d5da766c8e8961f568f75f1136e4e3fec1efc9fbe012a2b0f6. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:41:29Z), 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/QZTB42354226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff19e7ae4d0cf76a51fd03b947c4c60c71154bcc7df6b9243464b620c36d7279. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZTB42354227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2b42a95eae926234b4e15b7b387e8c977fb9e7d588f69defd5cf2307280bfe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFJ2375273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1158f0a796377a08460271fbb2ac136ce912f4ce987ec56cad359c50d70422c6. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFJ2375272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1415b4dfe5a1de3ba17c973167ddcec9223a5d1d64c759b749a94010d4cf21a3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFJ2390126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459a8563cc40258a59181d6d5c622623399c5a83f8a4e86608de9ca78e989dbb. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFJ2389343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa37ca65fb27307767dfcedd1e009efd8ac5c884f78c5ed10bda3fbb0143685. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:19:52Z), 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/QZWFJ2375270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37063295019fc8b33e3db2a02036fa138727380704b3cfb1ac8851b2327fcc1a. 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/GXD7V2256704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade19ce6729a6da910ea6e42dbd2b7ff733473c4a12b5aa7482966cba28e7125. 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/GXD7V2237400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd468356d822978e6f56d48820ee77aed72b70f09fa1adb2f10699376e46cc183. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GXD7V2268442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14705d7d1dbfaacc21228b99de88d0e8d8326bc77f78b1ca338566ab201df464. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:44Z), 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/GXD7V2237628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db7dd8a924fab61c6220b65326508d2dbe9f433697dc47776a96b8c6f1e6159. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZW9L2441644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235b9c9239616a8a6e6fff398b0e74c9dbda574d17161b27e2f90886a8b32b4d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:15:25Z), 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/QZW9L2441647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4ad556b049e3a58904617273428468b139dfd18f0ed338746d2a945e0a58e5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:27:52Z), 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/QZNJW2532702.