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 0xc8dae8e9ab035213021325b7b9ad769768a9e55dbc104122c14730f4fb9b9bd2. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f65077a-3249-4427-91df-a8b54691610a.json and https://artists.proofprofile.net/proofs/artist/1f65077a-3249-4427-91df-a8b54691610a.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 0xe4742434e6b28568f3dfd53c4641e3b050216146e51bdee9e37dedcdb0ae07ed. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZGLM2154097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9500ec2cdd677520c7b8c9dcaeb3eed919ad975d5b7c3d9af4b1e46bdcadf30b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGLM2154098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a5c9d9b58eeb2022805a219924981e31ecb06409ac6b03fda1c81467a78526. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZGLM2154099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8bef7a31b1be79e054ef936eb368e06dd93b44696f74fe49946a6616446a99. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZGLM2154100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8e788056b535267a69c37bd376867557763bf300ec7e962fc9484f66b18daf. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZGLM2154101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0073ba5d53a2b4d8b832b16b50f7ec20630134014799e88876807f613c37fe. 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/QZGLM2154102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75ef1eaa7aadd33cb1ec75d0f667f5d1f9842a67fa0d9da2b436c9720bc92bc. 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/QZGLM2154103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159bc708b2395463933e07c9bcb6fbb11a2cc253708d780d4a0928059bd85b8a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:50:07Z), 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/QZGLM2154104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30fa882612e771fa758770beec67987791878562870e52a3ff42eba88ec9d70. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZGLM2154105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4884f20d2bee5d8a46cfa7ba554d64510ec375a14061695d0b99b5dc9ad9c8e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:57:05Z), 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/QZGLM2154106.