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 0xf752b62bcc46b1cdd666639148a3249d1fcce13cd34afd997688cd159cb00aaa. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b063beea-f315-4a27-9e2c-1061357c72d4.json and https://artists.proofprofile.net/proofs/artist/b063beea-f315-4a27-9e2c-1061357c72d4.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 0x53b3bdc7343b72d3ac4f353647387316bf0560c2a653959788d76802941e36dc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFZ62560238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e485c195c8c8407c198759e09cd6f68e7fa2760885fd0e92a370ea60f34be16. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:50Z), 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/QZFZ62560239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe265d110b389d4589e08ebe66dcaad810dbe79f2196e937127c2607a477cf815. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ62560240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22213bd0d18afde3c05063635b110b95ae42aba614eec0a50e88b356fd0584d4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ62560241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafa12980a08b6e935940f0cdfd1d625c2c26b611bfeea49c032f9d7f9e59775. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZFZ62560242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b45da7dd1ff43b27dcc964db36a3bbe81840a3f4bccc31ef0e6f3adf90c1ef. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GX3Q92552048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df20c79b3c2edc8636f8b7d9621e3c47afb6f5c7d502249f9ab5d2718b8ea66. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:33:22Z), 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/GX3Q92552049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5906da978ecd3d90e8b8ad896d373906d32bfa8b7faaef8213e68e570aba923. 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/GX3Q92552050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0fc9f2eb3825428b64245182e3cd5409b2fd6816112995f07b7086e1774de5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX3Q92552051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef643bc84b0a1ffdc238d71de89beac46d7f1661e3b4132d7345bf292d7947a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX3Q92552052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91eb9eb32bb595a76a1a20408b162098721598975e218a6090c1051e7559d1e5. 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/GX3Q92552054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd939022d19540c579cef18f043354f9bb078b3fa31a477d5bd1f37e9a030d1b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX3Q92552055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220c0b793567cf35753ccab1badedf2fc5bf015d420a310f91ff3efd087ed201. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GX3Q92552056.