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 0xf96e0303e85c4e7efb3195b5ca4c1907aa8ad60490a881d1d79a808f2d0af101. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/675f11f1-3d34-4313-80f1-e439878218c2.json and https://artists.proofprofile.net/proofs/artist/675f11f1-3d34-4313-80f1-e439878218c2.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 0xd71dc2822560b24d022077d219960edbc7b0cb4b169ca4f776501d52e8e539cd. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZGLS2100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d60d29481e2a1bf0e43352f2dae04dadb0f57bf5d0662fa6f7dea53f8a15ec8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHZ62254741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240293d41ffb417d196b57bb7bf01793b4e8883a8aa9398b872b90addb9f867c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNJW2276765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8b0125737d60d0440a98de90147ab71c53f952ccef2a723c5cbdeaa2b041c3. 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/QZW9L2273161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e517875af31be0c943ed76b33733046aaffb1d9692417e79dbf1711423f36b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2334432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e91ef0470eada616b5c8cab6383b6db8eec49c312570b807ae26b0f1f60b2e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJY2311793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0ffec663357f9ed8cdb1fccdf9732bf461c0bdf707b15378add8a111ce00cc. 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/QZW9K2356812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefbdc7936479f30447b1c94295a117d5c225bb0e662130154fe5efda7fa981e. 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/QZ5AB2400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc8233037e3d28b71f33329541f9b64ee2fb403f4db7abd14e58e11ded48e56. 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/QZGLM2489377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b754c59f65730236ab707a1675c0c585d79bb7591067aeac6ccaac64f782d61. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJX2467905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304c9e2d88dd635adabeb33e13131a488a5fd20a4ffcddf565836c30c7ff34da. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTVM2435123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce25cf167f734f3417e27024fbb54adff1ef23e896f97e2056c5e865204dd863. 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/QZW9M2343198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14721090c93f4106613a23214a262249f62af158e99479642c96cecec8719d71. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJY2318603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd3e8a853003a234769c8a947e7d6ffefaeed7b38a83261ba4ea5f281e52158. 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/QZW9K2326134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9200bfd0d2a039929c269eb5913b25112d40a00211dfc664e1d3039952e304. 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/AEA3A2314080.