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 0xfa667a815043c025cfe63a6bd0c503b2d90309f7ba8765b474f54de1a131ba40. 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/b0520319-586d-4d8f-896b-99dad6fb899a.json and https://artists.proofprofile.net/proofs/artist/b0520319-586d-4d8f-896b-99dad6fb899a.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 0xe8aef50901b54b86ae6dd1d2a11dcaac833bdf0ad4724282a135c387a129292f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:08Z), 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/DELJ82022706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0756996361bb9c806e43da0aefc680a3df8a5a69a4630da5dd04c6ab46087d1a. 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/QZPLS2147905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002daa7bff4f51562fc6d9f4dab5eb322eb5d364b140a7d69a59be7db2bff805. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:32:21Z), 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/QZPLS2147907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fd96cc65846b27bd411661ff4e29dbb3424fd6fa6d98c8451abdf49cba928c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZAC22304410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3bb16f594f20edcd07aa53a337cdb04fecd5e06e31784af07ff385eb1d9b5a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:15Z), 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/CZAC22304404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16c3bc1a5d8e832ef5a966102fabefbc417d9b2f098941fe8dc6105693afd05. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CZAC22304405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528fd9e680b21d09d77f1f76bc5b81abf7f7f72b21ebd8005ca0744315b388c5. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CZAC22304407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223ba8cc6053e44b020d3976d6df15fde3dad6d371280a1f6bbc9f60c641870f. 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/CZAC22304408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ead25754e80b031187278abca0e016690020e4ff20c640352c1be9bcb68ae06. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CZAC22304411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20670ccad8ac0b56d7f34bb74792ce11b15717bafc3d3c76c0a8ca6a89129e2b. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:56:14Z), 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/CZAC22510402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8905e2490e071adabc67be352dbe97b597f0f3a218ebcb39d402448ddf663dc7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZAC22510405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527c5ce7d053f09f751096759a3e4829059f2581a191c71e66ac5d02afc659ff. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CZAC22510404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb11187b8ed997bc9138101a0f8e42078523dbb38a153c87c25d876d9eb24ca. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:34:25Z), 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/CZAC22510401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffeaa1a561bd67ae3c2edf0e0f81574aef84e5dfb987fe5e5ba86fc7698ecde. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/CZAC22510408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac26519eb7b92db171953ea36fc8c26f2481589e974f31aa0053f4a703113e0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLCK42402874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7721c9bb02b38c8bfc45539e08168486dcbfe858c3d9941a3012d2f8440b67e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZAKB2130848.