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 0xcb438430acee47ae877b7da244fbbac7f5e878ea602ae51c564a2c9c9f4c2b8e. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a57b6e8-4934-448b-a28b-429ef710a242.json and https://artists.proofprofile.net/proofs/artist/8a57b6e8-4934-448b-a28b-429ef710a242.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 0xafc2a014eca47c4569025435efb528d055ff6f466c3c73f8ce3a855cd2df3716. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZDA42177594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7f1626c563bd9a39aeb58ec1635c115a683f7648b5657aafb9b7230d2188f4. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:47:56Z), 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/QZFZ72541391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa974367aadf4b610d9a12b7b61aab2656b8142662c2383cda895be0cc04f1dc2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6K2482803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d7d5a8104d8a32cb838e4e5728820136bf011bb2cb77850fdb055c8f3e26e4. 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/QZFZ72541392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6064c936c32dbd01dd5d7799236e376fc1402fe6c49a60bb35e11e40aeb0ad6b. 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/QZFZ72541395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c393669f19f938ba6781c7c30d64be5a889e21308c15b7f4b83b6493a75f805. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:41Z), 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/QZFZ72541396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44992b538f239dcba5b918bede0ce0f631a032a564832559a8bd5a55a2ac395e. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZFZ72541398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb200d7d36872a34e0b98452d9a0ff4e575c53a09843ea7895e8786d9e13f85a9. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ72541399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1e751d512ce8c9f4bb338bc53a15b37f87e2697b292fb1b70d8d00cf3b0e5c. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZPLS2454128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f029f6535e7dadcb24a14ec09bdf7216a52ce8022d2d79dc0f841289f40cb12. 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/QZWFH2481368.