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 0xdf15773a7b133294bad551ece323632a1728ae561a246f1ef4ed0bb060233438. 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/d77e1df0-6e0f-4c72-9b46-c9d780dda5ce.json and https://artists.proofprofile.net/proofs/artist/d77e1df0-6e0f-4c72-9b46-c9d780dda5ce.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 0x468babea4b05f9b5af75c63e508c286f00deb8240160bcfd402e3d6c4dc7b49c. 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/USWS42021203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef518e00903faf46cecce8c8397e31d439ce4e763dab2165cd448fefe5573b8. 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/USWS42021208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128808dc73ef624a951885f3b1885c568349d937ba78318038b97c4093a685bb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPLR2069215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128808dc73ef624a951885f3b1885c568349d937ba78318038b97c4093a685bb. 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/QZPLR2069215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c59b863da182efd1b174a337c31d6581df7223e26cdfc08d7e6fe75a807571. 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/QZFZ22115491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae95e6e3fa08b32a4fb2ee4206ecce1bb13394b28d16c19adc8a290f3f50bfb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6N2175896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc344cfc9579df6a234893c467931f5a6092e32d0671da2456c4afd1c0db31f23. 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/QZTBB2314989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7f38263a7b1e86751cb21c8c09008ea02a2a8d51a9608bea54d77c53b0dadc. 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/USA2P1893572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53adb7b5c90a467f8f924b72bbe3be84f3f0934bb64c7525d66423a49ec6147f. 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/USCGJ1490394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9837fa661a06edebba59c6592563cf23417203838c2b5380b50ef2e2d3e9624f. 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/USA2P1893570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7c06cc6f7b25020ab2effa3741eaf6d340c2310d581b424589d8fa127840fa. 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/USA2P1893569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556a9d2055adccd3df23ef213cb7586a0aa7632ad6d037508f71859baf013f53. 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/USA2P1893574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fbc161bc9eecb5ea522b01132b18b2ad2d15f03fcbb57b265fd96feafa88fd. 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/USCGJ1490403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1d806799114bb7e062a0aa146cf7de3a472ce2c8e7b5f3a1ae7610af1483c1. 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/USA2P1893575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cde72e2b295571120e3073da560a3f3c0b1ab6d9a0ab6e5e220dc00bde42188. 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/USA2P1893571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259b43a3206d146e11f70b567b21b20fd415ba34d6699e0741d2f3639e986dce. 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/USA2P1893576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf123213e4fc566296e6ebe35ab0ea5cb573126b47fadcdfc6529d406174f9ce7. 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/USA2P1893577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26a5ac21359af00bc9466fc4f87661125cc401d97d47c91359d8098dff8b3b0. 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/USA2P1893578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a41c4bfe37fa1efd68fd21b1075a79d46fac089d80c0a46020dc6c9b0f1dfb8. 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/USA2P1893573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06797493efe05ba6df10ca6224d46b06186e97ed7d45822c282d327e69beb14e. 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/USX9P1352459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144eb25f3e0416dd36e03333c18450837ffd24c1c7e2ecba283428a5536ffc38. 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/QZEWT2300037.