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 0xc40779b4941242cf62684fcc9a1e1c39282a46049c45c4c943cb27843e6ecade. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bd2c29a-52f2-42ab-9604-d78e7816be2f.json and https://artists.proofprofile.net/proofs/artist/0bd2c29a-52f2-42ab-9604-d78e7816be2f.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 0x4fec8e29de3cd927cfc99d73166913db09fbac2c9575256a8b20f81d0a02ee79. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/LTD172200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505dfcc8b3fdfeb95fcabb95c2d323992a6a74d03ab83d0dc36d5f0956417fda. 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/LTD172200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d5d62ea2c6de2d0eb3a2ca4f54e31bde264a4c02d95e13e311b206857c86e. 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/LTD172200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fa277f53284a76ef198954076a970eb9586bc2d7fa2601e52d209ffb0713e3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/LTD172200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67108347f2d19fbd4c3e56273f211a78bd932ffb316e34e8149c2d1f2faf235d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/LTD172200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65fdd1e06dd32d278f7c8fceff16df0f579649bfeec6a4db047ef92166e40f9. 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/LTD172300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91cff1c448bd230180f5eb4da25783b9f7c4c600f849a7c84071c7737c11412. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/LTD172400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0308ea562985c4cd0510f350719d14efc63b47204b27257476965496e6e6871. 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/LTD172400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fd45c6ba08c195e5f587668e92e4aa706646ceb156cae8cbd98ea8f8567f14. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/LTD172300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca30ba18e7fc366a149867672a83e5b3bae22f9f2058d430673e6ac39b8c67e5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:44:04Z), 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/LTD172400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccacef129458c0d17aaabf834979dcf990c8c7c8ea9666d19271e2dd986afae0. 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/LTD172400009.