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 0x81cfe4486565e322ee4a03ada3001362554c51cbd400c336526bac3a28b59185. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaa8888b-4c57-4faf-a6ad-9020d1223d6f.json and https://artists.proofprofile.net/proofs/artist/eaa8888b-4c57-4faf-a6ad-9020d1223d6f.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 0x623cd0bf98a78dfd870c4d32fc660a61cbe368ceb8b3c7e83a625aedf065e417. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:04Z), 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/QZFZ32440340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923646c31899cff2424ef85b077be55034cb0ba78a53f05a4dca241a3e94d004. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:02:45Z), 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/QZFZ32498677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57803e5ffa36f2f24474492ebd54b4711891b608bd16aec5ea8e670a51e0c73. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZFZ42403763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b603f5c4ccb6e56fceb467659fd68ecc837029bc7e90430f9ee018198ea0bc. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFZ32468912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea329838cab84eb94222995f28004a93220aef04fac73609591e3c374c2a86a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA42499842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf241ac2fbb1878d49ce50b1e5290a9405e667dfe7b9bf3672acb4381585b6a4e. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:11:38Z), 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/QZDA52402685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd757dec79dec23e3743932f421207ffeb499082790207f9463dc2d203119057b. 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/QZDA42491279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700692b981fe3568b03958fa93cffe7dffdca76f3fb558c3fa5b490c230777e3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:09:02Z), 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/QZES52433443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6eb03a1cda726b68fd6282372f83dd38e7943a8ced595fec9dd29c9b141d32a. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:23:24Z), 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/QZES72444814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e6e12e5d831011549fcbf59e2d1e2803a31fbd9fc102751bced18ba02dc408. 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/QZES72444815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ffda709325e30f007dc06163dd6f3cf2d85a7c0f18b77c6bf8b015d71c74fe. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:35:56Z), 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/QZK6N2435226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e59478c8d20b229b2a4b2ee94f0089465a3f8adafe2b7c0f2145c691e423e25. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:40:31Z), 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/QZK6N2448610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675a947d125fa4e712f74e8e451cd6146699b34d18ce9bbd42f47895eeaba6ba. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:00:31Z), 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/QZK6J2406723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d896fd136fb8111e4d4e3b0cf75a60d55e90fe03bb8625256e1672f61f2281. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6H2440686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4f72956aa6c7319cc4dd2aec3ce095ae84191714e7e4a2a2d353bbaecb5c98. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:33:56Z), 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/QZK6F2459136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc57c49c54e4ba96dbe55e64e4555d07d47993090e2549e6f06c0ccd48a3d0b. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZMEP2490278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbaa32c61f67b0fda7a36b09558f5caadc3552d9cc572296cfbee182339115b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWR2433539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf179dde271d9dc72036305b7e18f1767ecc5406b808fecb28909b78197069ef0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:30:03Z), 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/QZNWS2477324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d706f8b37e3accf89be83e8225129bf64424ee23db1e2ac9cfb58c6f409993f. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:43:50Z), 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/QZNWT2468410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3869cb56bbb595a7161a573763909ae93581dfbaf585217470c4ca8910587862. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:46:49Z), 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/QZNWZ2437538.