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 0x396e32f30ca7a21e87c1aa7f7d97501602c4b6021f5a05d00d4173e558f4b4db. 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/5ca4f202-0b45-4f52-b8c4-ad07ff9ceaaa.json and https://artists.proofprofile.net/proofs/artist/5ca4f202-0b45-4f52-b8c4-ad07ff9ceaaa.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 0xd3f371997d8833ba7cc034a05b2823a04fd962b8f125e0ad7857c7090161cd26. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:17Z), 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/DEP551910468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbe521e1a69f448ef6c773a0f67943b4c10f392d5b3253995f0111df4bb10ba. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:02:18Z), 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/DEP551910186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea66e1f9eb58410d8e357a5f303c110199b23ebf2ccbb0b3aa8ff01951f50ab7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:55Z), 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/DEP551910187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffde8e026e972ae8fc821f48cba65a7bf4eb4114d1c7c4080d1c66dfe182b81. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEP551910194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e2bc9e101a2f25910270de2bc6e7412d5fe8b2a1417b5f5fb41d99a11c25fd. 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/DEP551910197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3e9f5bf29f49e6480eccaf841613a9b048df1c26c180401fd446794a443156. 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/DEP551800843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6056459e2d587de796ccecc61cf4913ae0f4cb37281cbf960d2d29129fb351. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DEP551800872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02147961eb5335ad60395316f91fe89cf70e6b8e7e4833e69214de2c63b2dd59. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBSMU5356627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2b46ff1c80dba57ac6ad326fd8fdadc90fdd7dd8efe014f21870d5956c2e31. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/DEP551913159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff21161a69a5b2ab27b7cbb38412729af643035a1541428f55652f3c97a77291. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DEP551913161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d2b6e8cb745cb7f818b74f65998e2b3af3cfc2ff148a3446e2128da566b0b4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEP552005651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09f2f797c31646d08825b04380f2b0bf339a47ccaa1b6c40a4f7b66165867ed. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/DEP552005653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589d7b0b38a105d45411601d06a8a0ba3428ec845f1eba9cadede0dae19878df. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEP552005654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b933f7f604f0cfa66ba081f5f7f6905049d809c3c555f4279594db248230d0. 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/DEP552005655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db4467be844eeb6d3888a81e547e6495a776c0464cb4f545b89931ff0383fb1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEP552005657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28dbe8b7438bae4d0e08d705f203d891618f985d941274380be30f166089bd6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEP552005664.