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 0x8c6fc0d77e138902a99b2b33762f761d8888e48e1581b09e590e7342ecc681ca. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2d64b46-1758-4221-8ad0-3efcbe4242a3.json and https://artists.proofprofile.net/proofs/artist/d2d64b46-1758-4221-8ad0-3efcbe4242a3.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 0x39eae397817252a998d6b6001ba13d90643b9a1212de611d4a93232d0fd4fbb8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DECY52101580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab04ca7a3cabbbb9ecea6eda1d23d5907e3d475e5d025f44bfe439803cb261d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZA742205087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e14ad2c7503a2ebda1bb4c789bc3f88a08f68d7c0c39eb617e9301ed94cedf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZA742205088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab04ca7a3cabbbb9ecea6eda1d23d5907e3d475e5d025f44bfe439803cb261d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZA742205087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e14ad2c7503a2ebda1bb4c789bc3f88a08f68d7c0c39eb617e9301ed94cedf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZA742205088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32c4a305b74b2475bed5b5361edcf2b65d29d8004fefa2ec33cf5a4306ca836. 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/GBKQU2390903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820e2bb7484e7b498b7826854da921a78535b3dae7bef15dc64a3fdb8d6dd7b1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBKQU2469128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a63c108b33c676e3742cadaa1b234816d837bcb27c3f733c32d09b86581ac9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLV62005898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d9e5bef7d5a01d54f7ce5f0fc67156f773afb0156a0588ba9961d67aa22100. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBJX32052518.