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 0x63a1a085d1731291fc18e66ad5f3b0381aae379793151ab1123b46ed2d51a385. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7d85f79-0ef6-4703-9764-0cdcb637c627.json and https://artists.proofprofile.net/proofs/artist/c7d85f79-0ef6-4703-9764-0cdcb637c627.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 0x2271ab6fe543236ced6842e113d46efa328d75d0bee05298a1c46fc9036327c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEQ2448755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e249a376ed09176720062cd0c1e92c82da6c353187338a4f93267f8c367e9e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEQ2448756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537dff8a0782c0e72f95edba0154dd19a5718195da24a3cdb7a1e292db74bd65. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZMEQ2448752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cfe8cff57057e294dc031e95821432c2b72ad059e9774159f8e133a5372aaf. 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/FRX282477314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfd1b41504dc245a06e35d3c212fe4a1bec58e86c4880993779370b6d312900. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRX282477304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121b5632a4fbfea6a1f96299a1bee0d205698cb26cf2977bd6a8d7df549b7425. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA082417011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed1300965c2fd7c6de62cebc94b0e49a2f2413937709d22404b93ff14fefe37. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA082417015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064a53c9020b4e6bc888e8f508f600698b6bf3aa8d2ec1beabbc0fcbf4b6e9be. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DGA082417022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd9c7b51cba287ee00c86d7a9119748ce62e99e8a678edac4be9adb0094399. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DGA082417019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d73a5e594faa26c5792846616ae9d38d1a58b098d3d6420934aa138d98d12b7. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/DGA082417021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f28fd58e81bc2f30b556d54adea8022ae0d794315f6f77c9f6d123291fa50d2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZMER2203300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762cbaf295fb7b7a9f59a507205048d2f98080beff0b9a6c293f8cc533f028bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ2159111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531803a4f2e885a7086efeb40eeec062de40d2f3e149958cedb7874a45f47a68. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USLZJ2159134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cce3a70b663cad82c9f7e461266bc29861ea2a7d675a7e4e8e336944e692702. 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/DEQ022005067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87be0e8bcca49a844c470cb205c1d8d598e9d1afa23628590c97798d5563edd6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBA2463831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802141bc4aaf2a0ea3e575f7075b4e823a1880939212c20d6f26eb25bc3193fb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTBA2462519.