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 0x682006a30a7714aa54595700972b7bbd2fa4850e6c0a4ef9f3bd7e525131bd04. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/614e6d10-a21e-49c3-b0b3-60f7ae87ef43.json and https://artists.proofprofile.net/proofs/artist/614e6d10-a21e-49c3-b0b3-60f7ae87ef43.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 0xfaa9cd086f2e55ad99946d22c384acb2671ef52db139b82e870f771cfbd35e45. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US89R1110502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f142fcdbfb12c803b4cf95cf1bed25248078be11ac88f0fee2023509ca9db7. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/US89R1110503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9214ff29ec92d1ac62d91bd82ee5891805d01bef42d439d95360b4dbbedc5822. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US89R1110508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec8b7718ab062be29ca8720e3833fc1d7bbdfdb8c0ddaf7e7cc64dba836d4ba. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US89R1110504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb228d4163ef2b74d8d12c4c3a46a81465ed091f2784847ce67b4ad485838ed. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US89R1110509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb019da649cc1fb6708aea5a6e6d33b02348123735c443c3aa518fd3a64cae736. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US89R1205648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eb88ad53011b04d19b1e904d1ed4088ac4d482f90e3c34fa6564d52b591c11. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US89R1205649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bf0939b8cf355457354743137d8a87eff8f55e21b1c92636ac60f6864f0652. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US89R1205650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dae05dbdca2accfae66083be62e2536839d657314cb9993962a29d35c0f9d54. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/US89R1205651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb9bcb5578d5313226135e6281143e9caf7aeb9f9adb61978b84f84014f0b27. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US89R1205652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4e1a1df13df1035f44382490aaebeed70e723e496b19180f3bb7ca91182764. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US89R1205653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca68ab0daa36d7e7c4961c77b55d576016f7f8e8fe93daa3d5da02a8f6b3014. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/US89R1205654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070c5310fa4efcb26ebd0053cad5284a55f86604abba5357b5bc8199bcb8a355. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/US89R1205656.