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 0x7904add2655fc5cfb1b0001a8f9038507e61f17d7e4ab70613920d587af9be3a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a925d30-3cb2-4c68-8543-418ff2dfbbee.json and https://artists.proofprofile.net/proofs/artist/6a925d30-3cb2-4c68-8543-418ff2dfbbee.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 0x0018dd28e60c58e8d8ac3dc5ea38ed9b7f3c1172959656ad25b8dc6d10946e32. 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/QZFYY2110748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3197c9709a50163e7235522ce7be4696c67d08d52da0a8638cdf6a3722a096e5. 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/QZFYX2161127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf2cb8cf693081e64d744adb22fa851a239be252d85a556817ee818a75e161f. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZFZ52133584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d96c94b5462eee890c920923b8b0ffa2fe2b9fabc2bf711ed70aaaba6851aa5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTAT2190719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c0a1555eccd5df53c5b77cc7673d7f61050a92f686c318031fe25be7633ba0. 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/QZES82286612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4423294c71c45f6933ab616d5c691208dc104c2ad215c77b1829498272bea4b7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:48:51Z), 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/QZHNA2204028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00a67768ceffdc430d1d6b386974ffa009b95c66fc95bdaf817887307ad6bad. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6M2215165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d44660d4a6b068da95958af53ae2d139edc3ce1f53b4529f2161425bb6a7769. 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/QZK6J2243919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7bd2d3073c0986253153badc35058d1c1881c7adc88ad6579bb251cfb1736c. 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/QZK6F2236222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3151edddbe5a42df218ade7f3d23aebd2109a7abf8df66477fd12d5bc7cd8c67. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZMEQ2258070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b10eeb8522ce93146ceb70fe932b27fbc57b7fa540bdc98a3adc9a24ebca8d. 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/QZNWX2269935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d44d39c9e3e77e3e7a005f2461691dc83efbd7e7cb28915a0bfbfd51e988d2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN92376791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f979206a8144b9b595f4f8e236758773440ecd81e72b2c19f2836c7f4b9e34. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:36:40Z), 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/QZTB52384519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8e4b27ce3803f7ff0420b4b64ad5f3c0229b4789b682d6468f23455b120b83. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZHNC2447741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8596855238c40e8308da8ba981f1282e7413b6e12916d1134c6c299026c48892. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZHNC2447742.