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 0xab334587e93ecaa24bde5fd940a800bc048ca384f030f2e5c543544f763e0fc3. 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/ee57902c-3a29-4415-93fb-d354b4606cdb.json and https://artists.proofprofile.net/proofs/artist/ee57902c-3a29-4415-93fb-d354b4606cdb.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 0xa41031af18f93a0636664a8c8a0ddb4f2d3f1521bc71656eeea478539064b388. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZFZ42044221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b72a2074121aa0e1bebe31780dde945b02bde5a211220bf8eafdd2b69d7c5eb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWQ2028078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf908abf2c3bc526d3115895b6f79b38e2213cc64a8d3a3b10b64563264e20301. 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/QZNWQ2028080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c95cd8f5a3333bb277d9d999c2883b9934e62e3b9e95a34bc244e87a3872ec7. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZNWQ2028083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e3729ff6e980d8ba53903d9fc334074a05d029b7f1e18fd22128b833b737c3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN42130130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e2fba56b4d082a33cc8431897c537762b068cbc799105438513e0c71cdef8c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZHN32229664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ebbc8289c7b766294aa1a35329dbbd19a6d645ae35fe27f68ec488369466a3. 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/QZHN82204897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6880c30ed530670d5f7686280b6746870d136f36bd81e92c3b27cb380e44e511. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZNWX2272997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538e08709bb3f7a8ee5697fb922d025847595ae5b620d4db890a16342193bdce. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USAR12300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac676234b9a2bbf626faee889c47be92bfc6f17b2621291325f2e1d30cd84b2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USAR12300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdd6420eeffb750672265f74e5ec0d0e66b9108286ba6743023d085d6dcc1c2. 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/USAR12300514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef51de0179d43c11bf1118c68d69b39d134149f0ffe10500ca8d33c89c6fb08. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USAR12300515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c18cc32daf535b59d79d69b5b4a4fc3273cb8140dde7c5bc8081fdfd1957102. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USAR12400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0286586dc7f8233869a4464499baa23213c0cda573591c5180d66b506c9a7855. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USAR12400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89346758b757f64409e49263a191b1beeefe3239ab53afcb82f52339f34c4d02. 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/USAR12400375.
Sugar, Prozac & Beer (feat. Jonah Kagen)