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 0xde089036a3605113643fa7faf7a6113056856b8b8f390de5634094c210ba2cd3. 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/05266df1-854c-441f-94e6-cc16f125238a.json and https://artists.proofprofile.net/proofs/artist/05266df1-854c-441f-94e6-cc16f125238a.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 0xa2c9d44417d87630665a39c7e6db061cab273cc04231941b28ef11f5b527f4dc. 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/DEXW62300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac66cc93108ac6b8fda06354f70a1e0caa0df8dda113276e0aefbf55e5cf3b0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEXW62000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752ca286131fb6369fa7e33dfde67f8b7cea65ae79e047dd00dbbad1594f79c6. 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/DEXW62100125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe587e8d992344af86c71e3d91e6282c28f07235175f98ae82b9b8395d08e98d8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEXW62100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379dadab2ff379d07fc7029a1d674b0243f1cb9359e3e9c8d89d3dd7eb432aa2. 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/DEXW62200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ba723de3f48aa10f75ecea9e915ec366cd4fd555cc1aa4193e2affd54a1c0b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:43Z), 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/NLF712201727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d5393a4219725e824bb3a4c14cd2dbc6f066ed5c864b9fbcdea508138dbbce. 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/DEXW62200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef68d5c65c0aef05c1a11bf413adfd4b06aa91db002eb54544f022b14400133. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEXW62300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c3483a26f9ff405c74b51b5c884a49b728a56ec3492465ee59f54e9bf7f3f4. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/DEXW62300288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55465d9f4badd02a95a902e4dc7f1fc7ac5d77c3111e6e20e9cc6f1ac89c2311. 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/DEXW62300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad8a2b651031271fce9bb9b4735ccadea5cf805ee50dbc9d8ddef2ff7133cf7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEXW62300337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366530fb674b2a2acc7b705d1ee3364b1e42e6d94f8d27f6e3993ddfcb7bf504. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:39:24Z), 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/DEXW62300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa76dcd6726153fe49ebbfde5c7f54ff251dd80ba17a9ae84d1641a03b674cc6. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/DEXW62300417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76839ed86e846adf486f550484134c90b44a3dbe4cecf84c6226acef3343ac3c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEXW62300428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917b30f242acea719caf47d0e611b401d1b9224328d06aff1576d5557008e905. 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/DEXW62400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50548a96e3f0f01a3616f9cfd2a38ee2d9fcea1279dcb32ae339e91d6e96d9f2. 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/DEXW62200045.