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 0xc412aff10fcff4937511ffae5d9dabb8e57857d79267e3e5a872afee8027e41c. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc83702b-f04b-4829-a63a-9b424d7efe26.json and https://artists.proofprofile.net/proofs/artist/dc83702b-f04b-4829-a63a-9b424d7efe26.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 0x4bb47d3a97a5158e26c2580aae47a2997c0e3152fcaa11d0a7bc900f8b588595. 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/QZCE61845746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cc449b8ca982bf27a7367ac96abc77944c3e5084420131bb193dfa89d46a8c. 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/QZCE61844666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9728629dc41bee402e2572b6ff1162e58185affc6673817990795f17d23a3d54. 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/QZCE61844670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889112031e31841f5fcd0631883bc5ac2c3780f04bfcb93759ae543f31dbc35e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:22:29Z), 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/QZCE61844381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c82c580615e0a4bfcae3a09fa259b082bae3a9d80694e6c2ba3628d18f2b16. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:58:11Z), 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/QZCE61844386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dd061b2adb72bb88a9d1e42a0b95f9f249e9a2cbce5fb8252360c64f220725. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDA41839969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f183cb38176bc72ba235db3b907a653d0c68a021129bd34ff7a5ebf77dfd82. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:57:27Z), 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/QZDA41839970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1119bbd926ef643a9fc3b7b308e9cbe02aab7df2b2d839527f0616f570f7bee8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZT662300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564e2ba427e0366442747f3c25d51c7bd17e0fef6b4a7f17c4349cb209eea678. 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/QZT662300035.