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 0xe55131c5e6d9cff5ef32446884898e1053deb6fbfd8533e3632799f393459331. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/121468c5-dca6-4983-a289-15efd15c5e89.json and https://artists.proofprofile.net/proofs/artist/121468c5-dca6-4983-a289-15efd15c5e89.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 0x6691f728462e5c0ac8869476aa93480ec0002610814852e4558eaba2cc54764e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SEXNQ2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8c389facc3bade7872ee6eee54c41597b6b7698a70e90551ae04f6d9665b1b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SEXNQ2000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f97513df401280545ce2190a5f3745b28b92ee9c64003235c3b6af79559f19b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SEXNQ2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6691f728462e5c0ac8869476aa93480ec0002610814852e4558eaba2cc54764e. 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/SEXNQ2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869645765e894621be0106a7b53ec9b0bf96451dca1c38242e7d6f212d712d5b. 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/SEXNQ2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8c389facc3bade7872ee6eee54c41597b6b7698a70e90551ae04f6d9665b1b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEXNQ2000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f97513df401280545ce2190a5f3745b28b92ee9c64003235c3b6af79559f19b. 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/SEXNQ2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6691f728462e5c0ac8869476aa93480ec0002610814852e4558eaba2cc54764e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SEXNQ2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1231e8e21c2dfa5da43196d2965462758853fe4d24e7e7fbc340adb2b15a76d2. 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/US6QR2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1231e8e21c2dfa5da43196d2965462758853fe4d24e7e7fbc340adb2b15a76d2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US6QR2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f97513df401280545ce2190a5f3745b28b92ee9c64003235c3b6af79559f19b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEXNQ2000101.