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 0xe24473ab5b1f9c17df72d0b1818762030ae7451bdcffdd8101c80f3e245cc91d. 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/5d4992f6-9f0b-4e0c-b189-57d557d1b40a.json and https://artists.proofprofile.net/proofs/artist/5d4992f6-9f0b-4e0c-b189-57d557d1b40a.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 0x732979d923e8ebac17e5c7c16a5f0b077af6de4214847c4c5f8abe164bbd16a5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6M2066983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2dfbed927f76e34334b95604af9ede207da1bba242408bea65ef1ae34d5650. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:35:36Z), 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/QZNWW2195956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8376fee99cab4327eade77da9771aef64cbe3f079ae46c34376dc2527213227. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZMEN2405417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d46512a1a7b46e503fe051d16c2ef12fe06917f921c1160f25f7d7276f52c9. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZZ7Q2412285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a4a286f7657eab04bf692aa1d159ab926dfb112357afd0d860a245e750df49. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7Q2412283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf348133055f3f21a4027a13d4b982dbc658470ff6d1606bd62811c506af5545. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZDA62422946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdeff8c219a6031b920e64100447b0bc2a3ffb1cb7965a2f17e7b296e5e45aa. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:47:24Z), 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/QZZ7Q2412284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d46512a1a7b46e503fe051d16c2ef12fe06917f921c1160f25f7d7276f52c9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7Q2412285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f949cb4ede2873184260fc398badcd674f52f764665e2646095882388b7c34. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHN52436031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687018e0e24bc327f1f2b32251aabf313d8b34aa82e53cd923ebd6cdc42eb56. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZHNC2053289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6a5972420746d2968aeab1b13a22270b78ff2a0da71be4ff205ce1596801e9. 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/QZK6H2570854.