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 0x81291f8fea62d70c5a21ae96819c22f8ed34444a027d527c6c6ea1ba8f295b24. 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/8e8bfda3-ffd0-4986-abb7-ad0c69b6a2aa.json and https://artists.proofprofile.net/proofs/artist/8e8bfda3-ffd0-4986-abb7-ad0c69b6a2aa.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 0xeae2bc238740baebdc89a9a721d170cd573ff5f061e65fae63775d35e79e5650. 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/CALVP2008692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea700114f5c74fdad89055f3111d0a0a0a5247723d9826047a98890672d7f33. 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/CALVP2008691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dad33e7e27ba5d395fac2b57fe4e63916718581af610b1df51386b33c6c303. 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/CALVP2008684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c209a50c70b762826e5581d623e1bc1d5dc4702b968bb7b39ced4508d6d7e3d. 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/CALVP2008689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663fcf5102a61d593570a1ea116b732b5282ee3eb45b71d516cd16bab585ad87. 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/CALVP2022105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403294f8273eeaa467ffc28db73db72cd743df309fb2fcfedb93de179803eee2. 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/CALVP2008690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e286ae79027ea124d79d9760907a3c39db701bb80d58bea0cb6ae9ce8784d65. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CALVP2008682.
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 0xf56fa021eea599ae895e7a57072a19adce643045b9a9ead5fe65f9048dea6989. 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/CALVP2008681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe484ccacae3b253847fbfdee2454895023bdbc0b5899130277ae0065161a330a. 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/CALVP2018811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c76752b3b3245335e5183ef86eba50a04af4238599d037335fd43b3e488a37. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CALVP2008686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec4a6b31130a590b72a2cc3c3c246d1ef46f841bb686b6279f58e14b7674eb7. 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/CAENV1872056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2affc4e18d78266aae7d9a71fa4a0b34371d6156de5825fa4a681df696144e59. 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/CAENV1872051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d27bb0ba072e6dddd41bc991eb0f715befa75ae927d7d52a7ebe6d0c48cd543. 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/CAENV1872055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fd78407e25f05a91c5f9b08649810d5bb753da9397cbea7afc85b60fa07d1e. 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/CAENV1872053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b594b6fe24b0c55250d5234e0b91fa381c58372ff205c7f347972487116752c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CAENV1872054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1761e719fcbc0c23c886c47fcd8c8cb7b8a312ec81f6b06020de51f60d6901d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CAENV1872050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21154766fcd4ae90829ee8c42b2e65b702973d12d1a077e8b56409d2969c2101. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CAENV1872049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd0a4f8a1b8a2af8b5c8515068f85dfc84eba27c360bd6db70399341acc219a. 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/TCJPW2376445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb86868b5ea367cc73be252312802be44988e789374c394e4078e2ee78e1b72e. 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/TCJPW2376444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10df9cb97a404c8d0611f6bd2cdaead9ac689c8aa4ca436e36f491f39e48c1f3. 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/TCJPW2387802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc0258e83e6ec33825600fc10c582fa53c6512005bf1572dff5bdacf36e871a. 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/QZ93L2102938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea95b69c22344a0c4e64a24ff849cd4df631f43f38ea4c4b6a4f502f19365825. 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/CACWV1937523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05c68d9991193c61f436a71bd340f1c36e0bb2256281c44fb25d933b3571f65. 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/CACWV1936421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c9854dbee0ce241c89b2290d808453fed4b9857fd859eb073c9394fae5cecd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CACWV1936426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29096d3452fb9e15aed508ed140126108f69ad65e20da4d5d7dc8184a647db6d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAHQJ1855526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb2db8dcfa60654f9dd48acefc8874a3c1db876f251e59811bd2a9aae853c98. 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/CAGOO1880984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980c030ee6adebb9a5c40dc44011bf5cc9429fb271db4e1f8d539fdc189d9567. 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/CAGOO1880980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd73527218e77640c50eb0cf20079d7c8b5c7118827f5e15282fcfe4c928005. 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/CAGOO1880979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5a30e3926b55e75d372f375206998da5747fd544b1832a3e8b50863019151b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CAGOO1880981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d96721a30e37282dd82b6ce420ca4e73669fbb62157257b23c07042390b59c. 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/CAENV1804947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5966cddc5685166401bdbdac95f31fbe64babd769ae6ea7983fa21ac4d98dcb1. 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/CAENV1804945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c59a878177aded9ce20b6faf10e9337152341525dd967eec38b3f602292f791. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAENV1804946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dc2a02d37674bafe78ff1befa1ef75428991d4ed416fb01f386cd0a1c7d2c0. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CAENV1804944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf7f0de3109321f1ca96bd76e295725511a5ff17f4b9596bfe99b38af87b5e0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CAENV1804948.