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 0xe2c168d7b07c9b9074564177b86ad1ac2b0ce508acaf172e90260f8a9052ccb0. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8b39677-c755-4760-9d70-531aa2f85166.json and https://artists.proofprofile.net/proofs/artist/f8b39677-c755-4760-9d70-531aa2f85166.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 0x43bf57b943b4896b0e23f23c39e472518b3905bf5df041b7fa193850f57c4545. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT5M32528975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efb6dbe6454cc0c2d929acd04311ba5002e302255fe8cc0235e5e6486be68ef. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT5M42527187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5981ea87cf559e0a02521a18b9dc7ec61ecd36ed894c1a34640231f64ba3052. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT5M42520571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3684ddb14b412f0141a1305e7082c79f2d6ac40af3f392fcd21668f98059966. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:20Z), 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/QT5M42567863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acc5a1bb37cf3eb03f4eef44b68e88476009ac33da46bb4b81a9a918aaaaaf6. 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/QT5M42598277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66d05d46f01c08617d97b2a01e0b063974f9949ca29fe8c4776ebd7cbfe1a25. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT5M42537269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91ccddc9e65a3115a3dd2d38c92c20ab6b4b232318532ad688b285e084ee3cd. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT5M42528065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6ef1f02ce8efc0601ca7a70d3e421394f349e525bb9b539a6453a0db0d9b15. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT5M42554032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae8aca163f7abb5f55d9fd9d13e8b15f868f208e55724d8d8a52c68e0632ebb. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT5M42543084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf777d897ba002d935fc56a4808ea6d4e497269fa472cfa5f93c17d5542409706. 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/QT5M42521578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a17fd03c1cc1f7befbbf894f311f8a4f6dbb2e2d442c8a932528150681803b0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:24:33Z), 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/QT5M42519987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6bd10a560df472312439c9e323ccc81cf110c659075c2bf7da5d35a3f91360. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:46:55Z), 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/QT5M42562900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223ccf992d79df4427e2a290adcf599fffe0e235c632a87fdbd6afc578aaeb2f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT5M42524654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaded92c86c1aebfdeb5eb2830d28f7a40c81b8ab8f0e1acf4401a19ab0ede9. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:18Z), 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/QT5M42528928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce44a15f9687042503bce77581046fa417e0c5a4ebd7efd82bfc5f8f8cb0dca4. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:28:16Z), 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/QT5M42535995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1805006d74539148b5979aafc3d981c133712d154ca7bae06d3b527bbba18ec1. 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/QT5M42593243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0750c6195f9505edd97872a37d2e855144b19342c42bf0b943ea28977f477e09. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QT5M42584432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e91fe8e04f93988ce531efb750464718a6e102cfb242c2bdbb4092328929cc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT5M42574094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82865b73d1b9fb0d59413923ac2d8cb56501372355504a891b9a4b1343dfe02. 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/QT5M42539494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22bfbc64865c2935d76c5965e5e3483ea829386116bac05b38865ad3a1500ed. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QT5M42580126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbade35f1b4d26dbe9741f302d30d503c41ca849a7a68d72005e67cc4013cb5f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT5M42510601.