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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835c6a5ccbb6ccf36c09aee9d24f833142d6f2cf0b2bffe10342d5012d492190. 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/ce334499-2f31-4e74-abe7-5664bbd17519.json and https://artists.proofprofile.net/proofs/artist/ce334499-2f31-4e74-abe7-5664bbd17519.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0bd57e293716de6dce47bff5ef47ddfb09b0785caece42ff8c60b6bb9e4f73. 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/QZDTV1800135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7d877c2bee5829506d4f7dcdc35d0e8ea12d25d324244508f3acc505328b92. 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/QZDTV1800167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09dc8c9bb290e61c524c8d8cde384a28f01fdf14fc50857485652b2f1bce7c2. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZDTV1800250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda79bc37dc24b097b5a40b8d7e919948edd4bde486660ca3bc9647cc5d241254. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDTV1900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25920c8097ac232d2a467b9f2f7dd14fb855f062edb3bbd7c1216fcf862bb32d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZDTV1900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00120bdc84af70e5f2230e205990ad5014ed2a3c8a11536d1964dc1945fb7230. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZDTV1900087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd105bf9bfc33d6343a92f158d1a5d3e528a875758b5068b70752d18f8170a92. 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/QZDTV1900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d9722b7d82ae9e0558e8e5297b6ed7edb82b9e65b58377ec78651cabc82c7. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZHN52068325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4e218fb2e3f8a6830211cb8893457e6c1e0457ee3bc23e26d6ea85c8e3d72e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZK6J2033297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d154254d97dd3d8d5367ac70de97d12956dc8340ceef54463738426a05e874. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWU2050707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e9849035b21dad59c39cbf2b4aa1b72007ff82038904fd0b68e66e422e0b42. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFZ62176851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611482bd0159d05edef7abe3883bffb3c6ac9665ae77f18c9e0fb7199b8def0d. 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/QZES62146233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9023bbbb0edb0f3231360d4ce695ee267b61202f44e4a7d413eee04343e726c4. 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/QZNWT2123376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4230c58c7836e4a869813e95d07670db3492559547bb66c3d079eadd8c6c8da1. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/QZDA42192205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ded96c70e69feca6b40fa51bdf68e412da4b8917d0dcc113d302c64d5dd03e7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHNB2098451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617ba2f74e95aa4b34f8e03dee37b87459069890676066aa9c5a1d7925f861d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNMU2072802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ab91380f6234d3125fc743d0bd0e1274909544a5f2e2e480e39d8e552e042c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNMU2072807.