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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe158599a278b6e0b079ceea3a1a432926f621b07cfbc444c0a229ab680e2378d. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09dd6b53-736b-41ee-b454-19774d78c609.json and https://artists.proofprofile.net/proofs/artist/09dd6b53-736b-41ee-b454-19774d78c609.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32a937113e45178ffc726add08cd2557baa07568d1c4d73d05ee7da8d2adc5e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GXH2J2566902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3f3be3e32676397a802fa36bab7f497000ccef08c2cb1b81bcc1dd2b497ba5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GXH2J2566901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1697f9f7ced0f6240e3934c263c473cbefd64ed21c000a7dcf8b9013f8538fb. 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/GXH2J2566904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf26f9041dd7dd301e6fac73a6cbe3e2652b2d7769b963f2c61510e7cf33ee00. 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/GXH2J2566881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd28ce3466fa1fa7f97133ccfcbbbedaca6bb27b18c7cb09b0cc85c3dd1f34a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GXHAF2502508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4720e49372c15c73eec570e7cb0efd5a4af96e37b12146761b595ab15b77d13f. 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/GXHAF2502402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed9ccd97ca29d1fe8967c0584197afa48d4f4b4fb8b4bab83731e3436ef7d4c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GXHAF2501969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba36bc8f048646ed3907657b9a524fd3f631dde299b0704c640af0bef7c045bd. 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/GXHAF2520758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0125358a9498e6c025b16eba0427ca81a25f3c4170c191b7026756c1667b2f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXHAF2520756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590cd6718aa1cb883ea7e44bcf7b8709f7cce0210cf62c8cd60cf2db13cd3e24. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXHG92545263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63465050a983909565aea00b2fcffa8dddf9eee006f67d0161ed2ccc3b0b3e4. 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/GXHG92550019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19af531dace8ee96543fd5bf9af7c3cd1e3dad4317c20f16cfaad6ce7bdd4fb7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GXHG92549908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf621ba82eaa8eb8115a1d4a5c872acbd12bd6017fef1ded8baf17e894fcd0c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GXHG92549911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4a3b7a8177a08bb607f3c9b772f204ec6de6fe10af1f10429e635060f7fdf4. 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/GXHG92563678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db24ac0aa93e166cb14336eb9c160c8da574c354fdafbb78b332b27b75c3071. 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/GXHG92563711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5aa4fc87537ecf05f9571cab6162bc193b8f980f5221526483d2bd3dbfb472. 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/GXHG92563672.