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 0x06c6bc331c342c692c6221634c12f4534e8212415e805be58401002440424763. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c5334a9-12ff-49bd-a04d-09872cb4b48a.json and https://artists.proofprofile.net/proofs/artist/1c5334a9-12ff-49bd-a04d-09872cb4b48a.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 0xc7f3ca46e9eaa5bc841b2e24ec2cc84fd9120b1137a1c95cae3eab12f27fa65c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QM6N22227599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471e71bb676693d66639a3c6cb5d7e4a48272701dbb840c2a6b5c104212693f0. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QM6N22227600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d4bb67fe68cb3c76fa1c023c7c76f9efd3172ef53e500c2a76b8ab10f4f5fa. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6N22227601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56feb29b2889170db5dd95d899559442dae4cfcf9bb6cec9a9116b5965606b88. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6N22227602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d890d9b8c8a00cde3f2ab4e8e30a26d52c52c0830f2f9d1643bb06950cdf05. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QM6N22227603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a1fc2cf120849251b3e8edcfb94959a35f3bfed10949da1cad7d7e86e7c199. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6N22227604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fb88c8b5065c34936c15513f890bf0b76bb11b3a3cd7c264210f9997ee0b6f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:48:41Z), 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/QM6N22227605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3540f213817098bd895b99259fd0ed125a657f54be53de28fd23f0c47561814. 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/QM6N22227608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7986494a4ce53c0be99b6f829999645872a61d433a1033273b0be5090ae5fc48. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6N22227609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc943f8aa4cee5188e6d0869b70c6e7a3db155ddb18c46bc0fda565eca96760. 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/TCJPZ2459165.