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 0xd5608e19b01cbdcd8f54e44b48edeb1f8f81b7c3bdaebe3f872699929c3d0345. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5b90f8e-7167-4512-b0ba-2ca112e567a9.json and https://artists.proofprofile.net/proofs/artist/c5b90f8e-7167-4512-b0ba-2ca112e567a9.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 0x3b561bde2a1f9ccd9c9dbae01c93a0daaa4d7b74a7836656d52d630c0e54c2c5. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USHM81932649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7863d22390d6d7e4d8ebdbb2bd665e350ff3f1334db6b1ca6eb64bea6dc7f2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USHM81932650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3b8e1018265f27fda42d4e2ec35e52b2b1f094a334ee4a5252c6ed0c43825d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM81932651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4158c89f9bcb78305b64ab937173ec2ea11874de04f2301d9568067915f281a. 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/USHM81932652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f412643d532f7454f19a19fd449d2e8a22b0cd413e7526300f20be145a002c5. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USHM81932653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8610c34e6fd93c231599a8f259540869c356a4083291267a86e6bb6cbb7e38. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:42:21Z), 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/USHM81932657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bf9a3d204cf0324b0ac35eeade322b2a6618060b621ad5f9cfea76e3a04a7b. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:18:08Z), 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/USHM81932658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ef8810b11ebedf18b6e5affae0ca1bd5d558737cd9a2a036d53d3ef7b5ee1b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:33:21Z), 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/USHM22015589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adfef39b068c3a4fab7f869d69b72a5afdc795104563b030bdf958a14d4b16a. 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/USL4Q2048243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6f1ba94ce1c3c26ab5c3dc7cca5b13a0cf7c22f8cd1392917c713908de3846. 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/USDY42173108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d6910eda19ef5140e6f0a7a514b780fd05dbbe2923d5f871358755d54a71a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USX9P2329053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36078815533fe85d7dc852731e5f50faf02ab4f924593be8aff601d7913dc106. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:38Z), 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/USCGH2254592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadce978d4b720d08f78b05420dd289f8998650abefc95297c601afdb465119a5. 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/USCGH2100531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1024e0439e83ac878eaa3e4f00bb335458c2bf796ad0a9040e8d6e8edbb0fbb. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USHM82357382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be2fd89b501991c85afedd347752348b4492d66468fb27e3b387c3b992fc4b0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USX9P2329054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95664d08d69af35b6ece4fb43572eed32a7178d975d46424f579b7f37b60b325. 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/USX9P2329056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ef8810b11ebedf18b6e5affae0ca1bd5d558737cd9a2a036d53d3ef7b5ee1b. 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/USHM22015589.