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 0x4cfcc0b5b73e38bd3b360174ea6d57581181838363ea8a56ba1bcb77d08add04. 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/879b03d9-39c1-464d-8ac8-a4b7552b47e6.json and https://artists.proofprofile.net/proofs/artist/879b03d9-39c1-464d-8ac8-a4b7552b47e6.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 0x86e7715e9c906f139711012fee25c68ad6b9916d445c032d8f1bb1aebc0ade08. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:24:40Z), 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/QZNWT2072558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee96cd2433652bb4f65b6323b9ae408e78b99cf46a9827ddc13b75671d0afa65. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWT2072559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db42e2ce31358501e338853d41277cf464d1e6097e9730b7acb4cb454b0522. 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/QZMEM2120814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb777563bc4547f4d3f814b7e945d106e1282bd109b1bcd6c1e6eb2e2c36c42b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZMEM2120815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb4c29ae3f9872202744d623c4659cdcdaf8fea3b6e5cdb277f5ca47912965c. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZMEM2120816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5937ff89086d46717fe640bf8d0ab80ebb4f23f568f8e7f56f89eea37fa9d16. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:02:02Z), 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/QZMEM2120817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb3a4d8c16615434688389ef153f9f5eb3c69d992f147daf313da5d94278e97. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEM2120818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303d38ea3883573f5b08d25d50a5a137bdc6faf78d6e95d700e5c3ede1f9bd7c. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZPLR2112974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4e4da8bea25eb26970ff361f55ced415ecf1a7f375be4ee943fd9d5d4cc6d9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWW2239307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd567a5019df65cef2fa2e9aaf67d237f849f6f6ec3a758dad6d21614c291a5af. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWW2239313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbef5bc7eb7acfbe9ee96b03931eb17619f5903683dc96483dcd60d0b3b7065. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWW2239314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4e67eadb66360a4afea65a8054f5e32e950ba33a2bbbde91487a5f1dfd5ab8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZWFG2322760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a941681e3792066f57328a152963d9b74ab7b0fb1d85f6c89dce8e3c28b418. 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/QT3F42443738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de9a88435db1c0f80be9fc1acbde451739cb0770d878859c7d7ea6999523bce. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3F42443739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e32762bbd982c0ec2d5dea361978a46cff565be0fd149e3e4e931ec7a0ec5ae. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QT3F42443740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ddaf220124ce19c4698f4e2a8bd9eac608907936831ae76465bba4f3439d24. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F42443741.