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 0x9d4d7cabcf0f9744d5de89caed33ac1839d0856419ab2f7bd3b53bbc30402110. 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/806e4fe5-f9a8-4517-be04-5718651e95fe.json and https://artists.proofprofile.net/proofs/artist/806e4fe5-f9a8-4517-be04-5718651e95fe.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 0x1cf5c18bc94e707a38438fb5120873a581c63759dbc264b23d653f9b73918a9f. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USHM22103868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fa6afd9aa3f649c65adbbb7584fa26f2a94260210392ea48ebd202d43d51fc. 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/USHM22103870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528af7409636733b520b304a6b5d95c9d25dfdf45c581dd6092e41bec9d4cf61. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USHM22103871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5709bd488a083bfdfccae65857cc0fd1d4bc4c3c67033d42421bfc56010344eb. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USHM22103873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b3a3bf1147ee01c09ae60f18440d7b616ef6d4bb4113d3af976e96ce34fb3d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:20:49Z), 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/QZDA82279010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eedd7e7d964f0d3ba66a1c5fc9859efbdd706517335b222333ae961402142e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZWFF2390292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84190c7a541fe373e07bf2310cca7379ffc049ebe3ef4a7342a1bfc20d8bb311. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZWFF2390293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82447a02185ed1f7d36c3e36839cad55b32a7d1a69131cb541cc44e1dafbf5e3. 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/QZES52400812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720377ca009643ceade0135cc32dd725a9cba9e513741ed4779d79c1779f8858. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES52400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878302690979261aa2e2dee200c5d998a4964d02ca61afe55b111efedd2d7235. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZDA82529821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6e7497b88cb635aa033bea71b795cc13346b047e9db425b459da772ef6c19a. 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/QZDA82529823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc929fb6e601fb901fa0da889f169dd7750424461d8c35b66a6834313f3ebf41. 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/QZDA82529824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aa68a9ed500e4a05f52e1a7409f7e3b485576fed0aebd814f1631bd744415a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA82529825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c89973ae7c62d351a494edd8acd064f157242f1a4e7ba3b45ae274e0b9f2304. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZDA82529826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e5d20899ba5528c52c890e0ee4f1dae995a33fad84b8a64177de9dd7f79160. 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/QZDA82529827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9176199c81e4346e0f6789044db9d2a01da43fd9507089f3f879087da7edd6bc. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/QZHNC2569970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c0fc7f08e360ae47f6ad896df0c163551efd786edf60444c8ee224eeee0d7c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHNC2569971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81704cd251c78848b67b5689ca25c0d493e58816c28bf29a584a3e0a70d8ed8b. 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/QZHNC2569972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae34117ef322729b2cb0e1dcfc71c608fd8baf1b16108e6202126ece20fb3cea. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:43Z), 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/QT3FF2584241.