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 0xec114d3a5866b39a105ce2b8dd66b9fceb9e9f728ae1a1d4a0397322458e848b. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cea481db-7913-4da1-98d2-0243d318cb75.json and https://artists.proofprofile.net/proofs/artist/cea481db-7913-4da1-98d2-0243d318cb75.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 0xae9b6fd1f5e8b0fda22afd886d2581923171639339dc85bcd77bfe8268e62244. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QZFYW2130097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c6d673f081cc47810a1f50d36939bd544760930f24e68ff890c4584f61640c. 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/QZNWZ2050167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1154e00f837075bcf56cd72e537b4c6d5d12f03b90b00ce4894205562cc4a252. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:00:29Z), 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/QZFYW2130099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47b3825ce2d7750cb73b17778d22504bf0c1f5f4850ece76edd0d58e9ecccb0. 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/QZK6K2288736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda25948f75556f7c0b822d8e1e9918b1b73eeee894493f15ab48460603a3ec54. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWV2315244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31198c9fe9da75cde6f7627591c7dbb67ab6d83a7f56a2cee373ef4a89163bb3. 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/ES71G2335185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a68b201ec79ee1aa6739691fdf6969f499ea26dbda284beccee7a90ed7915ec. 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/QZMEP2394618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461f185fa5725133f22288e5947ad402b714277fb2c443c9f970705196847b9e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZMEP2286557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47b3825ce2d7750cb73b17778d22504bf0c1f5f4850ece76edd0d58e9ecccb0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6K2288736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ce9a15b85774449f52ed2c8dab8a7d6c4fabb68626b4db9d165214fd967257. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ES71G2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaec8d9cddc7e04d8b8f80782f4e802bba7e6c3356d7660bb7d04badb4649a71. 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/QM6P42512350.