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 0x2571fc0ddb8d018426059023a06a8ede99e4544a60f467420e0077746cf2c057. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d138f21-0d41-4d5c-854c-93bbf26e9a21.json and https://artists.proofprofile.net/proofs/artist/7d138f21-0d41-4d5c-854c-93bbf26e9a21.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 0xbed482c4a69498b7ea3d0ab47d25beb9a535888576727cad674ceef7820e02cf. 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/USJ3V0632493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6ca83866bd437baa68e3d0066ee34990483f3d5ca4cda152e34c1479215021. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJ3V0632494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14bc051f0d7fa2c5c8401ba39a45767dd21df46e0452045576617543f02410a. 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/USJ3V0632495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d35764b133170e3f69470612ebf7c473afcd796164cd16cb80d49097464d302. 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/USJ3V0632499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb641053d7d2e2aec2784592abe9120f7513ae75e8ce5c0544d26d46a53997a. 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/USJ3V0632503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceba45449784d06ddce43b877b89bd3ad23504f74f8ebae5b703c7b315bc9eb6. Chain 2 (Bitcoin): anchored in block 957242 (2026-07-09T01:00:33Z), 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/USJ3V0632507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfee20ba8192cf6f8812c405ac323a4e601790dc2f53f207735c39b1fc90618. 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/USJ3V0632511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bbdb0caeaa17b5c4c6de2b24940bdcf8fef6bcad14001d44dffed68e65eceb. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USJ3V0632488.
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 0xa530010887ab60103733e2cf1c1ec5879f94628cb687ed2f1b1d8488c14fd408. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USJ3V0632489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd7dd6958dfe4272a362617dd6453fbe5b9c418248e38a6a711e335f967a33c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USJ3V0632490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a509e20e707d357e9318443c4ccf8bedee4b71f31e5cc4b7d28c5857cfa2ad8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USJ3V0632491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84c27630562e18884d3508fc1431cf2075781d8481cf6fe180090f020c2324e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USJ3V0632492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276a610aa4207fb4775f1007f4e026d552b522d66402e151092cc11b98320dc0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USJ3V0632496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc46db82853fa002fa03c3a36cfd3c089d13db7d811ea324d102660f522540a. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USJ3V0632497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f04aa7b427eb24025f86b662d2c3e7f8aa25b9bb90e8e8e4c86784dddc94fe5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USJ3V0632498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d16a79060ba5a4970436a05df7b32dd201c72cefcf8102363d0a261204f63bc. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/USJ3V0632500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec62a224ca8e161d7206697ed75fec0d75283f2c0e86f1a05e25cd9bbce6d6f9. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/USJ3V0632501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a8c172271d6c6c39625fb5d872f17415589b1a7e652a9539cbc464b2a41331. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USJ3V0632502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387c61b142030e77ddfffe1e30de74df385aace78f8aaa1daf98e4c6cbd8c972. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USJ3V0632504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526118c8ee14d8ba2ffb1b6d2fd9f940b0311c87a1ba49150b54f703a39a9f7c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USJ3V0632506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c569c1b36cf3ef7200676398da1b4cced0b072f31efd4be1c4a14122ffda22. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USJ3V0632508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fea493f4ab818e9873b4199f157f3c15bb3a0e81fdd79b08a94f8417842edbe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USJ3V0632509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11345be179ca24d11c742a71dbe8d9250bff5f5e13eeb701cf059eeacee0cec. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USJ3V0632510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa825ba01d2395b371fa513b7eeb84c657cede74c29133d272097597dbb1bcea4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USJ3V0632512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332649e2f1912eb37feca6cd7b3d90aec9083b5ea37ce0dfad8bef6ec40dceac. 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/QM4TW1947842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314e721f47f8a32dcf654fc7a32ee743146592386689f8c5e931d4cf612d833f. 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/QM4TW1947849.