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 0x77d0249a2fa645e97427447de09eb125bf320ecc1df6efdebe5b62329933466b. 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/be0a472b-f0e2-4c1c-9343-e5ea83bea95b.json and https://artists.proofprofile.net/proofs/artist/be0a472b-f0e2-4c1c-9343-e5ea83bea95b.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 0x59eec89a50d77ed2a89d2e71e5ca9fccbe26e379d590f0648001b02c490c960e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/UKVZ42000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc26e5e476b0417806a033d1f3abd8c7ea98a7c2565ebf50dbcec7ed6e2431a. 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/UKVZ42100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4148110d646f85720687639cf69a0ac33b187283950edf4ef4267d03523163b6. 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/UKVZ42000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d421e2d44d65b1cacfaaadace2d62b525482c0f7c6ed6ffddc65482fe3a7544. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:34:18Z), 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/UKVZ42100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2510b26d8edc35701693b744821a3e2637bcb3db764a847337839f9a258a9fe3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBLLT2215332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6923d02b094220c1e447f59e37194a761275953d6ab1ce1503dc9d33280fa0. 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/UKVZ42100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa15f6f605b4e18fbf7824030355fe489d71f90722ba70b1f7d2ddb59c24d32. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/UKVZ42100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48f4c329f61dcffc4a8d5ada5f643d7de7a7625fece180f09013f4f715848fa. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBLLT2236410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433bb4bf5ee660eb5b394da144ac9c62a8389dec0fde0c1c813d9b55b4490c31. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/GBLLT2236546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bbefe4e2f9d80ce654cc49814e36ce718f63c88d5b9923225285b9c30b4b23. 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/QZGXC2301132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f954a700359ea6f0be22e16df679af51da0482677bb04d284684058d3c204b. 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/QZGXC2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a6292905b83ea37748742a28e2050859871fbd1cdfb380c52818af7348491. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:42:07Z), 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/QZGXC2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e6f7ea04d5960bcf124566e6ef7464ff0e83fa2c67a70f6377f766533782ae. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZGXC2400823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4aa71e775ef95b74bf9facf5f2a5745c26bf9da2b392ebcb8bcaab6906156e. 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/QZGXC2400859.