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 0xce14f72692cc0c76ff027c4b67e7a0fae0933c02ffb5270239acc569078a2ed1. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5a08426-97bf-43ad-ad9b-6f76b394ea50.json and https://artists.proofprofile.net/proofs/artist/d5a08426-97bf-43ad-ad9b-6f76b394ea50.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 0xf654dcb2fa97f4e01be46435bda0cbcc3f75056e074bb598a9b5bdab8cc81af1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEJ1943100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c0b89f192835c9bcd1cb806de736324ac8d0663858fabe8820a57a36831fc0. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/FRX872277965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466e86643fda74963cbbf81fac50ab13f4e2b655015eec01fe7bd8c390a75d54. 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/QZW9K2494018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd2b5d5e03d4ba1896b3c9ab346e26eec253b20949e9d2951b15bc2227ed7f4. 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/QZPLS2477962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99483dacb6fed9b21d25577f3b36a056650d333834f6d1f307ea663ededd453a. 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/QZW9K2494020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e36ecb751a53560ed864cea05d74888ed19d85f30ec833d227373b568c3680. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZW9K2494021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2912e0c01e0903b4625f4bdb6fb63d302585a3a5d18d909467a1df5642e5deb0. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZW9K2494028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04037739fd002942873dd349e36ec4ada9119235ccf9eca78d2de0a0e41d771. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZWFE2430562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b785d1da8c0f85f249f4716265216a9d923bb203561e7d7e4f33a44aaa25d60. 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/QZW9K2494025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca29f36411bfe4f282607d0e4334b1cccd5ac6016112e99dd0f1f2e7f39d9a0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:50Z), 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/QZNJY2555789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3240afba392db54cc51839771463470b84cbda86421c2094bec2ea45e8973a50. 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/QZTPX2567279.