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 0x03ddcc29fbdcffbc8b28481fa998524c1bf71f38be56e8a36615f94553dad013. 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/63d23bb1-c028-43b5-bbfc-f6d9024e93a3.json and https://artists.proofprofile.net/proofs/artist/63d23bb1-c028-43b5-bbfc-f6d9024e93a3.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 0xd81aac6812819b14cfd8558f72eaf6fa5008ecf1c8919ddd7a7316eb944d4aa1. 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/USHM82053956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d6f1a7f5dba4dd221952eae2e082149da29dfe7335be354fcf2550736084bf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM22081948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd34dbc412df1a4b2f3564ca38a89cd0788d216088150714f608c85461a77a27. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USHM22229576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265dd00e9312b2d049bb43238badd23fb04ece054f62b2d85726284eceed809. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/USHM22229566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb3a54eac30e36993344894691b30602fe622ea72bb5bc4965d6ed1eaa18177. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM22229570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75038f8feae15a23eccc117d704ca21e2c3be38eead9dc0a7e5c0177345e2527. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWDE2201963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6f75171ac74325ee6f6623724e05a4f503aa8812be03106993d293ffe07328. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZTRX2311612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22db6d31ee5d13f529460507c51d1505fce484c7eb8a7564710e8de13a4b2e11. 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/QZWDD2384261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894049d5e9f0d4edd1c6c42846fa90c009339658f75668ea8ecbba51cb14a5a. 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/QZZ8A2396653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d80a17b6135ada3860e4818b370d868a17266b1ceacf98772416acbe3e2d332. 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/QZZEB2398718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894049d5e9f0d4edd1c6c42846fa90c009339658f75668ea8ecbba51cb14a5a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ8A2396653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5110a24b52853441e3eb1a8b24e401cee66cf6ea1127ae4ced0ea36498646ff5. 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/QZWDE2353082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22db6d31ee5d13f529460507c51d1505fce484c7eb8a7564710e8de13a4b2e11. 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/QZWDD2384261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51034eb848243b3b1155ed390e3551f6f960ce92ff27e1dfe23c14d0d96ad80. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTRX2445261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0207f8cc031623928b5852dd79c7be51a56966d89d9187da9c4d2389fa08a955. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTRX2445265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29780ec3e7600cfe8d401049e6a32cc88c795e3f0838b75b098a809549a783f1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTRX2419882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24161a2a5615c706cb23c59606bdcd49048672e382945017791c4817ff9a1ab. 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/QZTRX2445289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d80a17b6135ada3860e4818b370d868a17266b1ceacf98772416acbe3e2d332. 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/QZZEB2398718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75038f8feae15a23eccc117d704ca21e2c3be38eead9dc0a7e5c0177345e2527. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDE2201963.