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 0xb355216de4fa83dccc81eff95ebf8500d173146731e360de7b8d4ec53753422a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75a723a9-1c59-4cb8-bc46-9767f284cf13.json and https://artists.proofprofile.net/proofs/artist/75a723a9-1c59-4cb8-bc46-9767f284cf13.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 0x863d6c558adf8fec2afc62d4f8006b33e4cdf73385c3a605852367eac1d66c2a. 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/TCADI1775871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015ab8903b8a12a83ddf38604d5727780e17aaae0b58d95f3bf78ec388d58c3d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCADI1775873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863d6c558adf8fec2afc62d4f8006b33e4cdf73385c3a605852367eac1d66c2a. 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/TCADI1775871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4980e00ca8e2856219ee4501c0c5cfd85d2071a90ae8edc99c161c882aa1061f. 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/TCADU1852857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50efece02707cdbf94c75f03668d5a300d5325131bb626afb1369b0828aa413a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:01:04Z), 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/TCAED1901068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef90ce97130c75da5781a44127f6d8737ca9ccfb14e64bf90c1c13abe75d0ba. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAFA2076872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c49550d42831dd08565bf714b875cc7081978ab9a1db8ab4540ff65d35d5467. 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/TCAJH2557212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfb608bd1a1d40e58b4df65fdb8c86d8e32e24cfeacc8b90341d6d3c6a0a6d3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:18:30Z), 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/QZQAY2584289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa938876b16170f541714fa74655ee960e00128f4f2f0aa4c40440ceeb54f195b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTLA2503947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b51cd0c9450cb6ab06df6cf8daa17e15c30fd675efea41ce130e6abce61348a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZQAY2516834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb361cb889d1e8e48fb5244684712b9031e87f23244758eb25a1c4c97da71b0a. 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/QZS7J2584065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd95b7f1b8ba16b85a403e301f38bbe9c9acee61ff20b989eab03f9054a445b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2297687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa7fed2c8017d2709bc36299fcce9754bd6e5ed6fb7030f4a3e38c5547d5db9. 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/USUYG1457508.