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 0x4a45863f3937bf3e2345eda17ba4a5194f3f2ae28a2fc4dd5908f5bec2889608. 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/4ca2da59-af8b-44a3-bc6c-9230cfc1c1ce.json and https://artists.proofprofile.net/proofs/artist/4ca2da59-af8b-44a3-bc6c-9230cfc1c1ce.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 0x9aea7a27a2b7d87714055553e3224322785fa9da40edf64c02761cd792e4b501. 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/FR96X1628680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19d42e74230ed91c41228528072699544e501fa8ddad714507d58dad1ce0ee3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:38Z), 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/FR96X1628683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599a1b2d7333e3287b6ace432c9fa049dbfd34a9dc6965432a553e5251d6dd11. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR96X1628687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee9612e29dd4420f7a5c16d2bdcc350316432437be5e8a2bbe9377a0962d05e. 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/FR96X1628688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c0b14324a34bf1352b299c1ae25e391e7c2500f4df292b73c60187a1d88db2. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FR96X1628691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876154c4d7cd6c03a48687c1bb3b6dbc2a7977d0e3b654c032b012f644a55f13. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR96X1628692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f10d530fb1450117641836975e10635a719203f06811f755e5bde65944a33a1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR96X1628693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d622707f65360af73b7deb8e0f21705bf78dd8216046da3d22238aae0761dd. 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/FRX201653487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df6f8646d2f24177e155d88ab6b3f8d04fc4b17029bd73a0975da08821c8778. 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/FRX201653490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551dc87e44eba4f9e52ab286819357e687f04781e899851e730309bc523b77b8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FR96X1614903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c657df4e3994407443e194e5308beaaf8cb9f339fd276b26ef940037f3d717. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR96X1614904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffd2aa496bd3ddcfb9f1b26318e6122df61b23633125183e6a58c506d398ed7. 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/FR96X1614905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6d4f04d010217bcee49a2e86da8ba652f7409c33e939fa2bb12afaecc57edc. 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/FR96X1614908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc262e7bc0883015e25cee22963af6f5a98e370c5451ce0774f6ef95a2b391a57. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/MNA032200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3709542b3f24bd90351c459e40cda122fb62e89de3f0d786cb5b83d2ceb06a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:33:53Z), 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/MNA032400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd164ee749eea652c3ac1a8bd2f8ee833c79b3617427a0399b1e84e713aa3a9c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:57Z), 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/MNA032400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb1525b7cad49af34b8af0f367a33620e050faed784b1ec2bfc52038943c062. 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/MNA032400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f0e11d547c3e94db5b5750ffc15f138cc87312cde5e2ad188d9d652848462d. 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/USCGJ1727606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1468eec74375e988d8bef8af45220a420358c2b2222f6b4ca19d1689da1e21. 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/USCGJ1727609.