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 0xbf9bc518bda55ba54bab9cde28bfe931edf831591f38c8205ecfded5d80b7365. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68962609-fa1c-4bf8-bdc3-8e7ec8e08aab.json and https://artists.proofprofile.net/proofs/artist/68962609-fa1c-4bf8-bdc3-8e7ec8e08aab.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 0x429effb9aea433528f2270451b1289d37bdedbe68034db322eee3abd67548e6e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:12:06Z), 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/QZHN41936394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae86c689f61804ff6f23b0edc6a51265df69a80afb4f6e13b74770e58585b2b2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN41936395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828bc4437de0387618d4819424b6399a1ff1f10e69beb0ba56ecac97f8e07a9e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:48:35Z), 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/QZHN41936396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ecc7709286ee5672bd31126a498a44d6bd766e6ad4cb0ae322210fda8dc481. 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/QZHN41936397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc93aa0f7e951889d2342b3c77bd66578c99a9c8accfdaf0e8e6cc78df942f0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZHN41936398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516d05c1b9ed5f90154ffa2462e336d38bf53ef25c18e6ea476e849c35878b13. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN41936399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ed1359e3a1ea644a85f5574a9f9fc3423e764f1bf02c4cc0c4a8bd59c6992b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN41936400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedc7469447dfa1f821f3aa088bc74143848a69cd9cdf31af5466a6119fc6c3b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN41936401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a9517e37ec555d0562203f844f1b4636d4d34e1c9cf3ccaf72b25d6ff60bd8. 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/QZHN41936403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3e8328fb2c2fdf8b154c7a6ec0854122b2aae25eade5fe0efaf5cd43587ce2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHN41936404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f1afc30c7fb19bcfe3adebb488824be253742dc37df734e43b14d640949edc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN41936405.