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 0x8e40f3cad2c717ea2f5c6158bd659e6919262d5bf99efce96432a32cb7d257a3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dc18eec-da8f-46ec-8022-92a3ecd73afc.json and https://artists.proofprofile.net/proofs/artist/0dc18eec-da8f-46ec-8022-92a3ecd73afc.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 0xcc0b9c879d826c8c4e438a54348b913122b90c177a759757cbf3bc1d2d5a5d96. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TWCT52104471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e65879d4b86f95c21a47f9a5e2a0c1c00e6350bc743bdbf42d084921665010c. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:26:44Z), 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/TWCT52207663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0708f8676c5ef19ce00cad3e2602650949f5828caf0fee5ffd78edf6087ce33e. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TWCT52106266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef5bb30cb0294783df1aaf0f288580c0fc9af5d96b93f01da21f54920ee92d6. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TWCT52208425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5745f3bcf33b0a474d1e0ec1c0ccdb79948202e8ee4ebc706bede969624755d3. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TWCT52331357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f27b884e46b367b0832c27e83f27b07cd8a2da068149eb26f03406fb582796b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TWCT52435494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa036388c68c4d0a9a0ee4cd57b0214a30a63340b1347325299977eb5d3985f9b. 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/TWCT52438012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd50d29ba54c8b897522939bb201067895e06fd0a2a6973df84db740048b69e. 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/TWCT52438276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb88e1656cda99615fa1316270988b14ef73feff2c4555af6ae10c19a7b9f78. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:13Z), 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/CAGOO2520730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb4eeb63ce7c8f0f9eb8803d034b57a691f60a93bbba439f37b1be8934f252e. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/TWCT52542553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b7308b68ed06ea25d064a28a89b26451a60bd4e3c310522d62690dec27bd7b. 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/TWCT52542820.