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 0x6d821e65a377044cc15d02da6892bc586b0b0897a2392491af5a167efc708216. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/048442db-ca62-4cf7-920c-8b6447a16f03.json and https://artists.proofprofile.net/proofs/artist/048442db-ca62-4cf7-920c-8b6447a16f03.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 0xc4d9f857b70d257b055ac7ac73c279569d5ff88ed99990de5a0f8f87d6c2703e. 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/QZFZ72371775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957e1b7d70c3e5396c06f0409e5719c9849e7a51fc557b69d23595ac1f38b149. 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/QZFZ72371776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dddfbfd610a9056b9925ca9306feff15301f33b45a438ece7561b19f51e44ba. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ72371777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5462d729b977a97a1c5bb52e95b0a930c5f6d6ae4968c76296ca92b21b1a601. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ72371778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cb37ff0e17018e0f45fba6673482f52e0f17e4538bda423c0f6898cd883e56. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ72371779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1498b772bea5f8b2234344a94aa63b4309efd9abc08147e96a8fa853107e16. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ72371780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0e734e7fda260e0a82515e594168631145c9aac0ee1028d524ad5a9e353682. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZFZ72371781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7f0e3aaed23816c17ae4470359052e01f103c379f04ae100d32a8a4a2625c7. 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/QZDA82298674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f9a9a1699ee3619828056522d725d4f9e81cbe40cce2fd2ba7b3154173ad0a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA82298675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f10ed38a63acdd30b9dae6e15a2e198bc34a6abf34ed0d9be2e7e0499e0d65f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA82298679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d8d4ab722cb98121e6867e101920a18857ab553f3fdb1eddd5965f37f4c523. 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/QZNWS2195463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54137010ea34c86f010f9d78a402e56780015c8df5e18b1eed627fa14f430c12. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEN2034345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bab664e7d42719048d11aca13ffbf517669619df7a6fb942ddbc74f8671397. 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/QZMEN2034346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff7e30b14bc6bc2ca0c3633b32c650e5c9d887fd7eee060f783bd64142f9c38. 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/QZMEN2034347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cb37ff0e17018e0f45fba6673482f52e0f17e4538bda423c0f6898cd883e56. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ72371779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb523c9eda242ed7577a1d4627fe1e3d516314655b8e8dc37526b8bee4ae3b892. 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/QZK6P2212032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858f29b037dfa21f12004f0ebaf4413a24b3a9fb209ea3eb1739c0b9d8b0d93c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6P2212033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc310c8035b5a7fc4160f3ef7271c730cdb4aa071cf3cf9eb504ce9599bcdeff2. 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/QZK6P2212034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51bad145292c01816bdfd865b1603efd40617b395ac6fb7b961ba83986273ca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWU2153253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeddc92948aadd6102df9a4e3f9fea3ac5357f6f6515ac3b23bae8f4cf0437b8. 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/QZHN52034428.