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 0x2340ab63df78a34feff8a97f837d52256ad02655b2b3376b0a974510e80e35f5. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f1caeef-45e4-42d4-bd4b-c1ab6acc1d39.json and https://artists.proofprofile.net/proofs/artist/5f1caeef-45e4-42d4-bd4b-c1ab6acc1d39.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 0x880780ba3dea2700e0239bbed2aaa2095f8051eca283e9796e6b67383b83e89d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EZ2538437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26eb5b4ff0743b531ee0110868a2545cfaaee90564f4450f0995074c47ecfbe. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3EZ2594704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72296db9304f737390f595d48ce8b6bc0a249667e3f3f57b66a892b7626a718f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3EZ2594698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0042ea0a43f08054516564b21980ef35944880586479429b0d9d79deb36fd3b3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3EZ2592180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14b30fda27953f3fdea3c20cf85c06fcc493bb36df685d1c9aada9ba74e742f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3F32505977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad309aa55d3b33cfee00490f4e20da2ac320a39d6f126614852651bd568bc5c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3F32509213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7a03dfbb7fb32c2b6811379d98dad5f6b577313fa08bafbfe8e57fe21bc7ee. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QT3F32525602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662c97b6310db57fc12752ae01c7876527d163fbcc4f892d6216c98e64db7390. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3F52550374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d1de1b3c5d68c53d42a32c177cf66214905817f348e7363c654a2b47928b18. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F52555512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678277d046829ce95746867a3395e5009c88990e4bc9e42a6b8fe1d992a65fe3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F52550339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ff94faef7325d5a26de3ec9444e18eb65f6d6f31d93263772699de60bd1480. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F52550321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0799dafae381e2355c793aad0d07b2015562f0b76914c1fc8e06aa100afbc241. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F62516418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf720dd3ec781052c5b55f0a4ceda0ceabaaec3f40f85ddeebe2851322384afc8. 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/QT3F62516409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d81ba4ec0e0903d591963c8600360adc49bb67754f07a57c5376bf035679634. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F62513933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7784841543379a060aeacd9dcb03bed097cd4275ab91721aa89bc693dc3683e9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F72501812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895c3febfd58c2b3c0bada0f4246145ee8adf278e8520159b8d2e5e46b969183. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F72501809.