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 0xe93c0f1582fcb602d70745c60d625a80fd781284e85c34d995337b34f31752ba. 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/2abdb886-f18c-43d7-b64e-3df1c6d78da6.json and https://artists.proofprofile.net/proofs/artist/2abdb886-f18c-43d7-b64e-3df1c6d78da6.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 0x5ad38783bd79b4100547246a662da2e7863f8f43e9727147223c27d0cd8bc042. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES81886564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3686bfd8fa5293e80ca118c1c94362c48d24cc5209b79d337b9073bec4f4335. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ4JJ1945177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa61dc874f7e18c9016aa3b0ec92539adc494e90f04e5299a1058c93877552a2. 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/QZDA81921223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefff166acf5c9a87c114fbde4a68790f37928a91f1fe81904bdefef3081addc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:10:28Z), 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/QZFYY1915179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd347adb03b3c6c8d3de58b73f4d57f2ba37161bbfc6ad6a1a7e1216d7c6ff686. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:06:06Z), 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/QZES82030596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631905a6afff24f825839568e42cc58b676d1bfb33a9d42b531aa0fdee8e8521. 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/QZFZ52134469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5db8477d84a57e1170cc528dc3cd42eda4fa0beebf7229687cd5eca173c480. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWT2151518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fece658dedf6524d95db272fa89990a1290d3b78b115448229a6331394a460. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:02:18Z), 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/QZPLR2101652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d01d2a295e4026c6e69cfe8d06855c211478d4fdd5480ec6db52209e1b609fe. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN52238920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6f84ae1f1bdd4ba440051ea156ae6f54e34e294a1881c2b78180ef66db24c3. 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/QZK6M2298845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccd5639be96aefee396ad7719722c276e755908a3f9fbdcc94d772fd9d91318. 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/QZTAU2254676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70dc9c739a2bbbe5b7a322757dc105a4287f139b627095d4c38384826ed93b8. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:32:10Z), 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/QZTB22275142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e82d5acf4453150207e78168cfa98bf8c5e3098c9db26ba0847d72a56561d4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA72301757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb045c263610b3790d9945baac7eb81f4ec40892850eb7c536b109a7f4eec9f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:27:26Z), 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/QZHN82339748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd764202abc0fd150c2ead2d31275505f99388538dae0978a4c943c62b32fa436. 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/QZDA52474040.