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 0x7bb58d535f33dcdee5fed7d5c70f98991eeae8b183e2ea5573f4754fe780852c. 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/00fd3c90-56af-4345-ac2d-e6241a701ee1.json and https://artists.proofprofile.net/proofs/artist/00fd3c90-56af-4345-ac2d-e6241a701ee1.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 0x1776a119231710f26647acc03601bb8ab3551dbfcd2ff31f35baea99e8e95c52. 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/ES50A2000264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fbe7721355e7ed556281b13f71685f9fcfa448858451752bdb315b43d49f85. 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/ES50A2000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8371369001fd0404a862f9bcb37b0d80b5d2081d72709c9f20429e82387cd6fa. 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/ES50A2000413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f77f9f2e2e525cb62c209a0762597507210da6abe6108c089a67fc9012d645. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ES50A2000577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fd2e9bf35ee856c91ce3267c19e93805fea712f885f41c95b699fce2373934. 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/US83Z2046293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d840b5baef032adcb360eec22382f939fdd34ee8e69e6ae05f683f3558d46fe. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QM42K2164617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1bdb1778baac0d037eb8cf677a424e03f2eb2b85a9edd4bf18fe35ea7f978d. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FR2X42158420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892e7aefcc0f04477ad2ab098d6b47f8177af5ae93f73745518f88c0db5ba729. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FRS182169152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a4c041d1f1dfec612d1aa8db0f5f017057788d3c89794ca2fc06c7d14c633f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/US83Z2415135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4076181c61ebda999892eabf78d056f63c449a3456811e2f8bb62733d18c3e3e. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/US83Z2425298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf999b5a84353a814050cf659f27fc0725b2419c2839c2da435b6c46a60825b72. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2425592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16290207e8a42d3f752ba83d50364e5e9a53c98481d622d3e632699737ec82c3. 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/US83Z2426579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4b4b70c27e8541036d4d1cf94147bb275e012a2a269ccded486838474590d0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US83Z2426585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf99a9ea13b1d71a4f3708b166c3a407f6e301c2ef222c9847b8882f3eb6aad2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US83Z2427952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faae793a22bea97f79b3ae81e9bec675e6cf92c48768c7ceb867e5694473bb3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2501814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da2ae73d7e3708cf0f35f80d3abfd20cb76cd7f5581af35f6a94f67d9ff8e9f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US83Z2549892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8bb1d1af1347af2f8f860e4cd4b18d7d37df948936aae2026630095d8a10a1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/US83Z2553880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3d7b4d10e5a4883d991a83929438beec6068f0e0a052ebcaa7ef978e08ef2e. 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/ES50A2000246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81abd7ec43746eac1b04852ce0836195f9e456ded3eca1a00373eef18857bc4e. 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/US83Z2513650.