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 0x79311887dfcfe431406a71181afa0516658b1443affc24bc61be0674a38476eb. 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/aaf2b3ef-abaf-4ba8-b1c3-a078508586cc.json and https://artists.proofprofile.net/proofs/artist/aaf2b3ef-abaf-4ba8-b1c3-a078508586cc.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 0x55f7de335dfaf54a8c667b5782971a0125f6c86cf023038c804b63582a18b2b4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAT2172368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae2e355b9ac03dda6d9c14784969966e1711401f75b20bb24f3589b052ae255. 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/QZHNB2229579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dfe8d0e125cf9ad59ab2768421993fcecab8b31cf3e9246d1b6295e0e9417d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMEZE1946284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd4d77504985d6d8dd0c3eadd4f44680ababbcb02b7063e8f06e2d32a1307ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMEZE1946268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c29bf1066b3ab1390929b0573a8fa107856e371011ea9453406463184df6b0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMEZE1946205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41324289545519624c9e659bf35991ebf0328567c10b07729842760c8cda22c7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZPLS2385662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd4d77504985d6d8dd0c3eadd4f44680ababbcb02b7063e8f06e2d32a1307ab. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMEZE1946268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2253676b55c42b6c8e497ec2b974557bd2d0fa68158d012c7b09667c53e29122. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNA2161159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ad34a28638a4d00d16fe3a9a3faa18c20809480137f97f2733df813eaafa5c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA72102720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf54fe4c887aa34cd9f42dbc2163c5a17add378f0254665d4ace9e0679a6d1c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWU2431809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd1b44c107e13ed046ecd2ee43a27f7f9775fee5b172dc9a6f71e2f7b7f82e6. 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/QZK6G2314394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a61f6eff13f4f25563827fe620bbefdae177103e8f6076768df99a2a59ff04. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWU2431810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41324289545519624c9e659bf35991ebf0328567c10b07729842760c8cda22c7. 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/QZPLS2385662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8314a144320c4b90d00963c4942cebe6e4782571baacf0e3d6af4711a328c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFF2348001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ab9abb6da0c504015ffd069eeee4940e80bcec564edda2bd6c67eab0d0281c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWU2431811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5052653debf893995d59b72a14374360c2bc1ade7a2085e9fc272415cc080e4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEQ2345431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa2c597c5b47acf427dbe98ce3823fad1952eb8abfc84447a17edd525701ea6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6L2483740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c622f97b844f827efdc84d8720b520f8735c0783d2332f69c61a718992f79d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN92474597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872863b4b11c18646a2f64293534e0dcb9e05b42ca70de0f09cd91ede668d942. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6P2452934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e46b1d8a586bc917b9c64e08ec3d42d3a83b76ce34089fc238056c85ac45a8. 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/QZMEP2430569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c331872d6fd139faaef171d85896a5ca49906528070046ff80d10b08d0e9ed. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZTB72342323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0ce333cdb537dead29c2f9b1693e7f230f67d9824901ff6120e5be9dcfd7e6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWU2431812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d0392db6113d448a5c68b2fff2cbc6490ddaa8681b23a4267049a3b10d94d9. 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/QZFZ62436160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e31b5f6088f818189eb8eeb4735ff76fffe7497c6c597a04190f7fbc46d6ae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82495126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ea6c7554de3ca39cfafb30278c8e24580c568f8b9d8725b1fc1ac3eff94664. 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/QZFZ62356820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7985f0d2a662769bf95112fe4caf4b20c0e57c3da8df97da97f1c81891a864d6. 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/USA2P2107102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc38f8f79e62d1e07ea26f6651c57d3583160ce7fe9c11eef2eaa619ea343ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAT2352072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd4d77504985d6d8dd0c3eadd4f44680ababbcb02b7063e8f06e2d32a1307ab. 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/QMEZE1946268.