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 0xcbee62668ae00ead09dd6b6ddc9f5b50ee520178e4a7aa26fdf11712895d528b. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0df8796-db2e-455e-a44f-23335c243f14.json and https://artists.proofprofile.net/proofs/artist/c0df8796-db2e-455e-a44f-23335c243f14.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 0xf3f078e2bfa6040c02c5084e3110fdcb4e91b93966d06d178df5f9a13e356d05. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:26:07Z), 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/USHM82034837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f08d484e99918cf1eaf74267c637e5adf2923b58643cf071d01837996e93430. 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/QT4E22500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa402b875db53d499b50aab7102df5c7696439888d501221715b8a7a50cf9b9ba. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT4E22500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b6694b32560fa131b9862750aa4da82b87fd57d0e7f0351c7a1c9e39e8e9d8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:53:10Z), 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/QT4E22500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7c577f9318ca6f6744e52fbd84f7e7979df1650ce44da6b438ee02ec548b52. 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/QT4E22500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9987134c5e610faa889783646dd61422bc1fccde38e0f67604b1449239439f6c. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:59:26Z), 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/QT4E22500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed28f3194d82681bb17dc478bb07ccfa853d28356301fab971f8044e56fe915. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT4E22500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62e0c24d9e329b421fbf1b22d38b84fae80044cf350701fecfe7b0f1041f9eb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT4E22500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5b647f87491c1cbf8db0d32b8a0e28995da05a4dc0cae6bfcba95d253c6001. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:48:06Z), 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/QT4E22500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb8334220c4ae81408f75018ba4e63ca736de3c0b20f6d4621c05ec1abed530. 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/QT4E22500009.