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 0x879bcd3c8f8d1b7377e852ba0c3c718959008dc40f5c207e05e98add3ace9dea. 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/74b24432-800a-40ab-934f-336ceeeccd19.json and https://artists.proofprofile.net/proofs/artist/74b24432-800a-40ab-934f-336ceeeccd19.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 0x96f4026f0cbef986d7c376bd8eab050c2363fc16f711baa1d48727d3056b9554. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USJ3V2380959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabffaee0d1e867948102a968dbb08fd4996fdb5c3f39ee9d4fb219dd30e4aa24. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:48:00Z), 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/USJ3V1382952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f36539c3e23e036465488547aeea043526c97878c355ebffbaaf20b5c3777d. 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/USJ3V1382955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6f3e8a1dd3200fa4545578be93c4f8c272843c3038ec8ecae2a2efed5b2807. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:05Z), 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/QZL382500701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1a99cd7c4257c7fec57badefcb1b6f26069bbe6e8363050dba4c39c27d5d4c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:22:21Z), 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/QZJG52595604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad81c8f1982f6c477137d1e3aa50e646506f26d57d410ad3a06b4cbc9c37fbd9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZJG52596139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b05c72f9d3071fdaafb2e444780719c6d28d737c6d5258220cc931bbcc15cc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNMW2544417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f61bad3408a95eb3c2f9855e12b0cbf666e33cbf167b6eb93fe22c2a81091b5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:30Z), 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/QZNMW2568790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10124ce538e232c04afb5c9803e81cf8146c1a32c1531f4b60dd5f10ceda2fb. 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/QZNMW2553017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f953a44877952450698a4559806d9cbebad234b965cec02d2cda783a412e9b9. 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/QZNMX2551633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c30bd054e9a622f5fa8dd5960d430a12ab3bb10f0d87d23b17ad17272aa59. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNMX2591407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97615aec8d2aa58a96815eeea1a06939e8f5239e787cac390f24c093794dc4ee. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNMX2591409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9826ff8b2bcf3cf4f45be02aaef7fec6848504ce4a7d9f0e21d03dd0645db3ed. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNMY2592471.