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 0x167d04785fd39cb2c6e28dfd84c9bdb12268b743bbd58ba4a709217de5473c7b. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c777669c-c648-40bc-aec5-3830e3370fc8.json and https://artists.proofprofile.net/proofs/artist/c777669c-c648-40bc-aec5-3830e3370fc8.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 0x1c02b40fdc1c81f010dde3b536005f3ab75725c848593a47861b36f41bcce0b0. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/AUMEV2435886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105c00e51869f2fd1bb7f47bdd9bb67d3599d90c4b3b30e41b194214ef26fe26. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/AUMEV2435887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a972f18f8f374f92c26b3ece76e17c872b14288f0aa85ca069e4e82f3bcd688. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUMEV2435897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba6257fbe926b510e21ecb8d223a2de875538d1c8b2eb7c24eee75f552c37ed. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/AUMEV2435889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11fb76be28fd6660d46a2eac2f9d62039eb996c3123b9fd2596576d44295d2d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUMEV2435894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bf50a88c692ee69c87ddd9fdb9116aef99310807414774cfa403c4ac96c6ca. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/AUMEV2435896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a484670f6d386ff9581ccad65db3913e76053600f5a79e6bc66ecf2c3fdc849. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/AUMEV2435731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5128f3aecfb64645b26a89bbd9891135f2e2366474f6897fa8a95c4348e66f0. 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/AUMEV2435732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f3ff063375f7c79891d690dea4a73d78f08f05d8cbc2dbbee4086dcc279be. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/AUMEV2435733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85cf86eb28a17a657e2093505d0069930b0310a5935884f9d79be920dfe9cb3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/AUMEV2435735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9313338ee2479ec4f2563f6e07c9d7849efc82d55c28172bc93d3b6ca0823d26. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/AUMEV2435736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc72e430fe537f845f455e7e2a87796c6cce2cda5ceca2731dbadcbfdc07fd37. 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/AUMEV2435740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4d1efd7c6b51b9e3f13d7f9e23b5d07e76146f6f90bcb1228df3d9b06886a0. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USLZJ2503403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866bec82456511588df0a04863d03e1219a23851d6f1856b4e395a32df918b00. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USLZJ2503226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91090628a73276ec75491f1acead87130f8321428d8d7922b550fd482e7970cb. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USLZJ2503487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dde3649b934be4939bab9251894a55c9eac96f8a5798efd0399d6b25f6b020c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USLZJ2517268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29bda565627c485bb364695b18cf6b77ec5aada4eaed4de53e3e0aae8ff8e47. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USLZJ2517309.