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 0x1523f5c1317777a39f85ffb9dbf0725e34a5616cc82008b61614a15ff5fbce08. 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/3ccee7b8-aada-47c5-a10d-14e34bc41d1b.json and https://artists.proofprofile.net/proofs/artist/3ccee7b8-aada-47c5-a10d-14e34bc41d1b.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 0xaff97faec2afd93d339a5750a316d0d32d150297d50596f6427be94c37b3b2ce. 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/SE3D71701902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da4402e5ef66abbaec71b8d99124f94387c3d8cad5dda7ccedef93a0ba9e2b0. 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/SE3D71701903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bb0aa629bab391f348d6f33296795482b835d8f8803d2ddaaa811bd0167a7b. 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/SE3D71701904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5674067b490ad50ba98437695650733a815ce6bd9f776b903a5aeb789d9221cd. 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/SE3D71701906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc647c47dfb85d1494d9824ae9ee0d08acff85f4cbb8971a5eaef129382ad74c. 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/SE3D71701909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf581c5dc12485c021b0d73af0bb1846e23079634709743c07f62ee5b12a64328. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE3D71701910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2efd44f1fd6184d0d1f2f49cb7dfb526ba3674d24e0a948ac1653a7b92012ce. 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/USMBR1511196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d43cbb1696a67dd938ee3fec8f17179ca76496a6039745ac8e3b6e1c3e4b125. 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/QZFZ42039459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605ca7912626cf17f839fe8de9d1ee3b8ed970a19140b13890ca6f5c3e8dd9fe. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:21:32Z), 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/SE3D71900502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fd5652e6c92269e1a354665d43bac9ba5ba918eb53b0e0f006a8003a2e1260. 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/SE3D71900503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb601ea81db67e9c06c864eb85f3ba3147de400c114e1127bbd10b20db1e6c578. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE3D71900501.