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 0xf574917daef8a9d49cd6d0129c7b1c774fb7a5c90a9805e43f8a91531296cf96. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95de812e-2475-4388-90c5-014bac7052cb.json and https://artists.proofprofile.net/proofs/artist/95de812e-2475-4388-90c5-014bac7052cb.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 0x36bc47b483f3ae434abd28ff211882d278f9e7aae4f853fd91336f4dda06b66e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZGLM1912333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64d291e0d2c604bd8ac40cf6e9fbc4c3829624a1cf1f2eab45435ec0ae3973e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZGLM1912334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dfb2c458a20f0cc6f74fc154d219d77c908d02a40afde22b8f03d012a6c792. 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/QZGLM1912335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2f1c03f68e75fe9a4c8906a876962a62d536f374272be43f0b317077dd10f6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM1912336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a8943e962da9637f1f21a056b91a73d11994340e546000d3b6619ba43ee248. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZGLM1912337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1fe883eba2ae57709e18a607bd152967db132cfb5386b4a57b7ff4edf11e42. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM1912338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bb8f755b138036bff1b49ed45bff7c42751bb946b388a3f27f7018732c3d95. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZGLM1912339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75f687ff24acf08f12a3500b233587e1d8e11f1eec3f45bac178e9636430181. 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/QZGLM1912340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fa1fff60b887545718985ad7a244b114fcfc1a1d4f70aaaf401a37dff8db56. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZGLM1912341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44de6bec3f15e3058231bdb1d9e2b2c372f4e2ffaeed8d427ca414b1699fb4b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZGLM1912342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aef52a3fba52d8b29924b88d76b140893bde12185c6a6f4d91062c433b846e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZGLM1912343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04637c2e46e7749a94fd8d8705209ac21ee5ae73c76583294a156db68cd4ebe4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZGLM1912344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda63974a33c24d3fb9204a6e0978ee0875336afa71b4466d4a6ef9619f92900. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZGLM1912345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1633c4fc61714bac64c64411309397c159b2bba5477b35d0202ffe25d2360b87. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZGLM1912346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d9f38fda5ab2cc890dcfcd5837cc6f6ca859b13cc4fd32ae663c03f52c1148. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM1912347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3109c091cca55e8fbc38602fbcb49b021f912bca7c6246fac448e2a8332d0f8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZGLM1912348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c33bcecac392fd3e5fc40354e70d2198e79533a6b5553d8dec7aff584c01a9. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZGLM1912349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79032894ee448f94e93c950c1b4c18de22bf9a4101870056962e04a0841702dc. 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/QZGLM1912350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee614b396ae4e0334125d76eb83047136d80f5dc70a334171f7f3572999b1bc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZGLM1912351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9094645b7fbe06acb6e231eeec49d3485d58e5a7849817c5215f0e23caba15. 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/QZGLM2010545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b7f9837b5c76043f3aadf1d9528bb373b792faeb0b1e44f5bc331d58147864. 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/QZHZ62111364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc474aeab456542a8459a11bb684475355833c6906cd182d58817d2298526ed5a. 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/QZNJV2257868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6063fea99555506f16344ee2c533ff3e8ec3b3c513cfc91bb3fcba08b774d6cf. 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/QZNJX2436662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ae2137be069471d61614eb038f91d736513a3598a3ed473ab756b26906b16c. 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/USCGJ2014107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0fcc946d10c3d6013b283b61ffee5eb1fef94b34a83b9d07c1566e97a9135. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCABK1251748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3299b1027cdbcb8cdfc6b06af4cd8c5a821129aabb218b2c665f8c53d442f258. 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/USDY41829595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb0f776afc1abbf78dd054d19118d353e2a204f1f222c2194ec710ddc960002. 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/USDY42170383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9291a1b93d70411bd917c36c832b78421ffe5cf5f749792c483a1c4f921db584. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USDY42170386.