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 0xe6a1c6555366e912bb749abadf635353e1578496370b56588e2d0349b53d7328. 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/d13c38d0-5a5e-4c4a-9371-7f86a25cc654.json and https://artists.proofprofile.net/proofs/artist/d13c38d0-5a5e-4c4a-9371-7f86a25cc654.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 0x887c6345a779159ae6b32ddadd3f9f9f3d0b5763c7166773c8b3319366236ac6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB8KE1856861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cee5fa7dba85f3f6097cc3ae3c70d505dcedb9f1b8e4ca57ba1ae28f8e1014. 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/QZFZ32158585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386d7e1cd94a9a9c8225f337dab50200635ead0014112c578140df42bb3ff4f3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES72140170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1203df92269f75be18f9af57870e72a6c11fe74efcb60c0ff300da2223002d9c. 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/QZ5FN2362752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405f055002cc3291a784d0c6fc327b8f68102b991b67df2a7352a5fd78346fa3. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USLZJ2391263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdbb89f99903b847d0c6271018d99de33502a2e0daa400ed2db5f19da868713. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZEB2340288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d97289fbd4cb7154a69117d916b9798974f27044225a2141ea6816d24032dc. 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/GBWUL2479136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a447cf07cad668c5f91ec367518d9b171ec2266bad34b58cb752d8675ec59da. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZTRX2472874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5992dda74329800436a41958e3da1c7143629f1f3edca459638f3c7ee797e88c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:38:33Z), 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/QZWV32406790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff69fdedce60c2f0ca57789eadbcd9e8db4d2fa381b0db65460daf7834d0aaf. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZZ8A2573597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66001d497e0251cdaa7b9ca5f86c4b015de7aa036e81b82cce57e56e377d2939. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHCR1900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a36cface413ad64ef2bac69679c17555204cf01b277aaa94ad15eddccc7e4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHCR2000138.