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 0x1aec86349bd74c973ca5769897e8aa63e567dba0df4124e2694f8d0b3145f7d9. 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/d8de09e0-1ec8-4c22-a43b-789022c64c00.json and https://artists.proofprofile.net/proofs/artist/d8de09e0-1ec8-4c22-a43b-789022c64c00.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 0x2ff3613b4e5e5a4ac72610710da1bd9d13fc12b8b6770261086dbde57a6efa24. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:32:51Z), 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/DEFN91400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762213732d8e2672e91736bca1e97f2d2c64214fd9cbf240ff886c72586f8378. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEFN91400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153c5dcaf14a55b1e83f4017f5ecd3903bbaa3e03e62441e603c687060c2302e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DEFN91400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290995299f10998e3a99d5fe2cce573372d9de65898b6bcfdd8df7d1bd41dcf4. 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/DEFN91400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82c7f88c1122059fc49aa1e0de1f6affabda03dd5c0db9e148c0f9edcb58fa4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEFN91400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25e43e81ebb9fb736f244a36b19beca14a861108101587083c79abc61319686. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEFN91400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d82110dc33b153f853c39f815f404f9c906be48f7937f91e74745183f23d7a5. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/DEFN91400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c37ae2d183cd88372c9edc28170b276646efa15c0e49a672909dbfb4f2bc4a4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEFN91400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5dbaa3719e8bfed67ab0191bd4d6f6b468221b2f25f341efd9005cfb6268b3. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/DEFN91400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ccfdbf448f6ac519afa064512844d7d992240fb4d5750a6ab7f106972992e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEFN91400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9229eeb373f3f6629c25b03e30eb14c7367f8746c46bc7d995b22794c4f0ccd. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:33:24Z), 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/DEFN91400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1603336f78f339f82cd7a01173679239ce76e33eb5f1ce54102d847ba032d6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/DEFN91400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b3ff082c043175650acf173e6a059da2f2b2e58033ea8b3c5d4de9234d0918. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:19:02Z), 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/DEFN91400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a01e626f08e7abea1301b55f2b00ddfc4c89a22071f084f7412077e3194c3a. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:42Z), 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/DEFN91400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc69e09ef8c9694a1e38668af94a10120395dcd52df4e9c2aff464bdf32eb607. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DEFN91400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14df22add009d6f79e28b0438920252b506a2084392a92c5cf2748583b467afb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEFN91400141.