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 0x96306b4e855029b6e3ca54c48759a0b2be751c60e088cd23f2bb45d3da49604d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c892a391-0ec0-4636-b6cb-b42ad2fe2666.json and https://artists.proofprofile.net/proofs/artist/c892a391-0ec0-4636-b6cb-b42ad2fe2666.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 0x43d524fa97103f93d6f3389b9b4ed71bded03123622b751d94b34bd2132f693f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWDE2446842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79f7181edb6a87bab3f0acbffa20bed3bcb1a274f81841a56c34d851ee89c6a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWDE2446847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e590838cb157d9b261c60de4ec9cdf0dbdbbd67e9730c9c93b431ceaa09238. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWDE2446848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbad131e57da0ba3f6e5c65cce0a11adc907b23bd9a425ef3560b559b6d945d. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/QZWDE2446849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237186611e58807d31a67235450dac07637e78f0aaec2ac7b28fb0e193d20402. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:41:33Z), 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/QZWDE2446850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0967dde0f0ac769a6826427a080f33b9885869bc17c4c1922b3c211e80f64931. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWDE2446854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd5e785f8fd045147395a1765cfa5741c3bc2c8d6bf35c96fff82aeabd48937. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZWDE2446855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fa6f483aa48419cd990e61a2d817b8126ab65115a59847d2582ef1acebbef9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ7S2424242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bba067a6c05846ab1a128929d137aea8cb6d4d5afc236c293d32cddedca942. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZZ7S2424339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf237bd2c8140c5a7abf3baa8eeb16f775b594a3811387f8638218560b280659. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:36:48Z), 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/QZZ7S2424350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60636f4db0119c58080ebf201be053014ab2a589d59b1ba29314ee04447e2f18. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZZ7S2424357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52e7bfd265d53b931212f98102c6fc05bd5594bd8d93dc1ccbc015143e302b1. 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/QZZ7S2424369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399f87c5bea77048cb3861a94f2b5a8507f4fb78a2776fe062928063db7a798a. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZMEP2524104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7b8a233a6a80555bb7ef21e8d17fa8ee3ad1452e1d9ea7b55c8545b25245b6. 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/QZTBD2511125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813dfb48d209fa7861fd22cfa631c07aecb3e3b09748db8e8239e3ac4cdd727c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBD2555270.