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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322e41a7818324f3a76f392b7620efcc21acf84cdf9f3499d272e4fbefd9b913. 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/7e101f0b-2d90-4fec-a260-cbd5c177fa84.json and https://artists.proofprofile.net/proofs/artist/7e101f0b-2d90-4fec-a260-cbd5c177fa84.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cd87670bf2235df4ccd91c2a929289225bc9cee433fb9402e3a9422be079d1. 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/QMANG2239822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe090077c766905da7a271a87246a5bc069db8f17a09e775435dc22ba16bb9387. 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/QMANG2239824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f7ad89a41b1a9127e0f131000dbd10d927366721c2f29bc6b49ca67bbedf2d. 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/QMANG2239825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f9512054502625e893bad79f7fc993546d6b1c483490dc3ef839f1785faf0b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMANG2239830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315cf663e52f41fa78ceef86af0f617fce34969333db3908b3076b42a974e5c1. 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/QMANG2239828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb342c71509b295a7240ae6d23aa9ded936e1580ed49fa21bfa81801a1570fbce. 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/QMANG2239826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4befcc62806fb9cba1c31183204fa71f2ac56b73bfc7f2210a8112704427bed. 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/QMANG2206401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee63282bde8e635c26e2022406ff6fb8673f7ced20c0bd48835368688de106d. 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/QM3DF2203024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a443c42276ad5c81f09cb6bf73b48c83bf97b20b876bdd24a4dcb1f12e6572. 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/USANG2283353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd678cd06d370c66706368d72fae7969cc0229a289f5f85ed687999777a3e2a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USANG2273628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c68532eedbddc52727906c21ee1e0a91b5e07965fb4e1fdfd44aae27ed0e939. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USANG2253347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7742bf1766b8399c2c5af24f4c2db2904e72018fd29bd741f901a0c9b819a769. 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/US3DF2480562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9339f6b53384310f7edb1814303eb93e6ee28cddb0a9016a345e73a6f6fe7ee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US3DF2454694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65beb7b6c072316ce4f569b74a366cc772845f3955d186cbf68447e6e645e047. 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/USANG2267154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c817c9b47c44950f0a139a145f2e963625d92434839b2195b9c98d86db8567. 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/USANG2267155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc117d846a9ec24a118ab5b3a95bcd1292f447d2f9e866b1b21729b1911e6d4ac. 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/USANG2267183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe310af80b4144aaba5811053195c194765fef172ac51953be207bee384cf53a8. 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/USANG2267179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6906b4d76f31c6aee46ad1fcc5afac41f93355e5600545ddd630e3cd0aeafd50. 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/USANG2267185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3651f961e33aca25d4c7645031dedc8927f327b67f0ca5d34a50ae6d5ec4469c. 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/USANG2267186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e01046a287915849fa360de438eea33e55bc7b51645007d397d2f7dcfa86f0. 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/USANG2267195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d7287752080e0827c2077be502d5cf555f0633d4fab43f482d8d40e8049095. 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/USANG2267198.