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 0x2d6eaabf35e40fdc88090828bbe071a29762f22eac21a90f3239ace2324aac70. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/773676bc-e05a-4b4d-9733-55d77155d77e.json and https://artists.proofprofile.net/proofs/artist/773676bc-e05a-4b4d-9733-55d77155d77e.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 0xf9751555d739a3f485026449d3557be978663038935d85a588ea764f393e2dc1. 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/TCACS1629042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c5d1b862f17ed80dd5843889cffeef273180f2004ac57ba1d02a1d4d5d472e. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/TCACS1629044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36833ee04a17c7910eacd83eee2622ddedd66c4eb6d966c49770a579eb1990a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCACS1629060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec7d3dd1879cbfc23b051821f7734bd2478280b5e016afad067da6d4a7dff4c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCACS1629079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e749dd209163dfb981dd59fd22bbc29810e37c2913ce089f4a4edf95492d444. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/TCACS1629081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daae6b4164915e46fab6344bd3e46a6068683b1475cba33b061016b79d70f02. 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/TCACS1629086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1927d5bec856596ddd94e1bbc4d2df478bd38302f6f9cfe73b862d01c5f0f3e2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:38:08Z), 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/TCADD1728152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839cf2c296946fdbf5f3c19b379907271be05ada722117b737b314ddce1225be. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:35:11Z), 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/TCADY1866641.