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 0x059f56f60478c591f2e46a1a4f3c37d84126ccb68c62582c3ddde7e437e77bdd. 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/ab2bb791-beea-43f0-b2f2-948fe9710373.json and https://artists.proofprofile.net/proofs/artist/ab2bb791-beea-43f0-b2f2-948fe9710373.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 0x664df7e0bec79853c15093fbf157a780aa6de2b289429fba60b3a8e9c666b21c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN92489847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2063e564ee86486bf8c200961f339c9046fbc1722ce3e3750d1e93ac127670aa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHNA2464987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccb6316abc8dfa29d6ae8bb5516a67c42ba401736cbaa438253b19798725733. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:00:49Z), 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/QZTBB2439184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f0af20b98dc99f8684375fed4e3f8e6375f888eb07910a0b154947661a70fc. 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/QZFZ22521370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706ac94dd4843892643c18f37f9cb18c29a5f8ecca491dcc5d7cae2a12196b51. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:27:49Z), 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/QM4TX2513064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf913d17733616cb06f9e14830ebb22c0482bea331be7fbe93fbfc31005ba7be. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMBZ92525963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cf5c1afb229b207900382c6ebd7c07ca6eba13e2ac629fd954dd8f933f7d92. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:51Z), 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/QZWFH2517527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dc6bd861ffba158749c969125a014938a1d6e838be492485020aedb1b60865. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QT47X2501026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac069778b27b2e5296a734c6d6ceb9b1081dadda0b85e269de91c25d7b9cc8d. 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/QT47X2501027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512bf59a46728d88711d794a9a5aa77892e00de9151e9352ab6f6036a6a37052. 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/QT47X2501028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dfceae592c9783e6c3e5604417a76fd546bca7da226da76b321f07c96a75e9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT47X2501029.