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 0x85e5b84747b12367a3e4220642dd6316e41043302958a765d181b372f25b9cbd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/194c2d79-a858-4cfe-898e-c544f7fcd0e1.json and https://artists.proofprofile.net/proofs/artist/194c2d79-a858-4cfe-898e-c544f7fcd0e1.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 0x7438668d4e13f32dea5ec614a19dbf3996f8496aeaed349bba04b0b40a5976b5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRX282439613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469d18ef0fc5114f3e0ee008cb8bb9792503c6c924f6e638568c8eb9e4642bc6. 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/QM6P42427592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3255e4eb5651f2a5d55fd470848bf01d28c022f9e7954ddd2b9f526ddc32d067. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:36Z), 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/USANG2468405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aa1dea049389571e0ffcf975a929a5319363fc5096da7c01be24535fa5fb92. 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/DGA0T2414006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8858355bc6eeb14a0fa35cb77ae145909ff8bf2a4400a7237d144f9bd8ed0d0c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:13Z), 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/FR10S2508253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c233e3cca646d00c25c1c10622ee30d5819421ac9185597dea61d1d33901f1. 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/FR10S2508254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03087e2faafb68ad1032196ed3e2c0dd2722f2834edd48968f124a6887e08e00. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR10S2508255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28499ce3641b8a850a951edbb970e1139f3b3034e29f03462b87356af7114af7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR59R2501486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1a4e3f3f8038eac576a33e12867dec9d87531e0496bcc39c2ce4ca2a8bdaaa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM7282549710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baf6008a7f9db194915086d33d12eecbcda63d26d41265283792644467a2006. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:55:02Z), 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/FRX282591309.