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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8d6fdad2e3f2efbeed840a516033cd1acafe0c44d8b078336f913b42c0611f. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0165f17b-6ef2-44b9-a8b7-50e84270c294.json and https://artists.proofprofile.net/proofs/artist/0165f17b-6ef2-44b9-a8b7-50e84270c294.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Forget the Past, Let's Worry About the Future
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60bc4f9493caf45c7c748b859b38f15eac34a6ac9f144450759e83e89282dbb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NOCVC1609020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2bdb7cbba64700fe0e5ce0d82fe9cf999782d217b25685a09da896db870bca. 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/NOCVC1609030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bb4fbf9c4be6e3bc0589ba2c7d77ac30f34665da9b02fe5db1f1344bf8fd03. 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/NOCVC1609040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5a34a9462a68ac347d760b4df095c7ff92f39cd9945df53aec313b21600f50. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:05Z), 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/NOCVC2112020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc48d6ccb5588372310df3201505e8c3248faef281dab4277bab59676a8653f. 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/NOCVC2246010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71736f5921f858cf469ae82513026346b521cbf2c0029743badd953419babe05. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NOCVC2246020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7d9e14e6a2fe7135e73cf4fcf5aac67fb1644a6ca5121d24cfd84a12b8f803. 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/NOCVC2246030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd23a9a37abff3028597e753c50d675b816405bbe2e84cad54906c9094f3c289. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:27:34Z), 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/NOCVC2246050.
Pil & Bue: Bonus Level 1 (Live in Alta Rock City)