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 0xc717c68a3a414938b1fab9946cb573ffd4d24db446f52291a6a20a04deaf1e16. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e442de6f-1b78-4be2-9e54-3d9c8541cdc2.json and https://artists.proofprofile.net/proofs/artist/e442de6f-1b78-4be2-9e54-3d9c8541cdc2.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 0x1534af7fadf69f40fda2e56ea9df13573dde06549551b741132eb6f9ff410575. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHN32591563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e654670f741770835946dbb74c332f98f293dc7ef54e320eb7674881a1ede7. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHN32591564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ece25a28204ca2c8e62ade6e9b0e2a0f7de841176f9836d4f4d08ff6aceb3b2. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHN32591565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f418b981320a3b024a28a4b266ff8f540dd6196466a392d72736b64bff40a12. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN32591566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e77728e46eb193ae851a66ddc6a299df833faf80eb0f335cf5df600c6b6f4f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN32591567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faeb62dd35d8f85de00d04b850cfcb4d803e6cde3a337f90c94406b51ec58e2. 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/QZHN32591568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7cd073abc94e9bcdc1cb1f70865fd2dc9b01473778fa80594960e1b7c799d2. 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/QZHN32591569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca1a4853cdad4884a98fe6116fa185de752a836eddcbc9cf905fef7a9bb767a. 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/QZHN32591570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff4ab1bb4bfeb37549f64c3def5f8e59e8b173ebe20398e5ee5513ede2b459d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN32591571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a54621d62a93987d6dc9ee2807f7e4da2c7b241356f1a2ffea8c99620e4ae8. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZHN32591572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767d10faafafb1bda1d56131cde0803e9ba4e21acf3c3e3bb618b040cab1f7f6. 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/QZHN32591573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459c9230e1e875e5ff83c878918b41bdaffed46203803af2bb17b6a58ef1e56e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHN32591574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afa9797bf14c3f52eddafc86f51b2f7261ae524ef17aa4780601561d4ea7dc0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHN32591575.