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 0x75221e573b12d3aa00312594c848adb449cafa5935cf18638acdfd04f3413bbf. 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/26966030-5271-49b7-8f58-7a10d9e4989f.json and https://artists.proofprofile.net/proofs/artist/26966030-5271-49b7-8f58-7a10d9e4989f.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 0x1ca90b6ceaec4a342b4c4cc70bf2c0a1b07fa9c72f49f91eac390360f2ecd95a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:54:36Z), 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/QZFZ72086922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3485350a46ef78d4570772ce8442fb27c22e2a4fd82b8594c6621e39fe36f6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZFZ72086923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b39271a30c28d198e392c8917e16204fe5f593b070f421d533e80788fad502. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZFZ72086929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0462362f7311e2b0d827204afce8e702cd38211e216a500e671e987ddbda37c9. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZFZ72086933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e075011a48168ac8d554311683e19c7450a12de3fe1ec57004f16fa7e1d0ee. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ72086939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcb9317a99892c03b833bc577da7e4e14b24d8a48b9df0e63f76dd776641c4e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFZ72086940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b9f55b47bdcadafd28ebe76df550a29b115379ad4648b0d144c60580f4c672. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFZ72086941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a95663900e2dc09fa3a15146a221457b4adea0bc6199d3cf8a0c52a39b60fda. 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/QZFZ72086943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332325aa57b1b5e9912ec83be5e3ba389be1d59fd9bfb165347c6a13ebe400e6. 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/QZHN82097296.