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 0xaea2e695baf308eb0cedd8f66fdd6a8da440f87a6dfe57368f0facf465cc829e. 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/22040ca5-775e-4dba-a2d4-c1756f4f81e2.json and https://artists.proofprofile.net/proofs/artist/22040ca5-775e-4dba-a2d4-c1756f4f81e2.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 0x811134ade1f49a9dde9c43261cb149151039ea99ded747676b4c72193570ac79. 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/FR96X2399245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94224c542d2e7edb60bc16ec945a045355492d681b31a6bfacdcdd3f9aa7d03c. 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/NL8RL2435178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f803fb7afe1995ece7e5b6b6a2ec18eb43b81995f83567abcd3026a322e0b1. 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/NL8RL2435182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a9ced27553e9daed26009ee81a5543b2f3df49958955a976e8ffda941ebaa7. 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/NL8RL2435183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e03e2064477854cfbd646181d57ea4c2675956a5a46141511c1ef52d9078625. 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/NL8RL2435179.
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 0x55f3dfe6aa7263984853f75ef296e752afde2f97cbb7c24b2898f998e6775f0c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NL8RL2435180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5530f57258c47e5c4d9b037ffa5784472918ff4a3b745bcf8bc7058146e22bd. 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/NL8RL2436010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f23d47790533f4a5f562284ca231fa42cef0a5664bf8faaff0a113651e66bba. 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/NL8RL2435201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c27f7a6eefe73cc982d39fab96e28e21bb4c6e64512f75e64c6329e14c5590. 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/NL8RL2435204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9303a36e9c69cece03b15923ffb075106d782f2452b0dfca96d4a5d1a5fe5353. 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/NL8RL2435202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70996146451f8e430d97865d0e3d9465fdd715f616ecfa97a5b0163edb804647. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/NL8RL2435203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc2bae236a1ab51bbdbd13110ec3ffab61dfc7fae282308fb71f25c965d5426. 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/NL8RL2436104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa568a5c8976c247a0b186bb5bb35743c65ce340b257cc954ed71b80f8759c7ae. 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/NL8RL2434949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98551ad5e1ac3db25339cd67080fadf3e55d8ca9b3fbfece41a73bb17591b657. 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/NL8RL2434954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf10bcb917fff158eb11d65f0b808826a692b9f78c8718e08a6f73c6325a6b0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NL8RL2434951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa33178d7950dac9a4402717e56e55a3cd9b1ecba175672b354cddf79d56d4c9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NL8RL2434952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf038cc470655c30fad077393fd63e3ff0c5b14a7fb33f12d36214c1f56d9bc85. 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/NL8RL2435935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce09ee23ffae91017587c7dae8dd0da238a8beab4eaa995b8bf9c9a02577257. 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/NL8RL2435205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6b650b606fd22e2dfd241974f5ef7ae9a2af7a0e6fa2998e6e973cac54dc17. 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/TWDL72203093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18c370e018daf7321d932fc7e2de9157ece8b85d858b6a85d8dda29a043e44b. 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/FR96X2251459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ff1968622b8c9454c4c0175c355042c848d61422be00caecaf7d583c2cd480. 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/NL8RL2436537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645181fcec14f6da600e41d45357aab513f14f683420126cdedbb7f000f708f4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ632200345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1130ab9153c7265d39953b88d1f8721171a38300f5a0924d7918ee9344a3665d. 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/NL8RL2436496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79d004106bf8422f65c0b24e8e3473b83ebb9f1a9fdc11ca95e7950241b5e6e. 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/NL8RL2437031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd3d2a0648f4c56ba9965e125db8f262ebddc02f8400932dba4fd88ebcf1347. 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/NL8RL2436448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743e4603b2c559087701b5f1da807c4385c92ee5985147958ced47446aa02468. 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/NL8RL2436452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86a4f9932073da3c893a0db55d17e2bff8822c8348627fc17866ec3838d0d1f. 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/NL3M12403523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddaebc7f7b8d65e593683427b8b6364ac24a28ffc431c18bf7dae9b09b6f290. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:51:53Z), 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/NL3M12404109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a09b97d1375c4067bedee64dcc71125259a9102b518c05d78fb48a105a25ba2. 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/NL3M12405433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693288267e0b178fcff22326c48afb890c1f92781dd89903deb2e5663e8b11a6. 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/NL8RL2434944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4562088917d9b9ef586eb2a5a40bd241bd53b1e6532c068fe1935c18d5f4d18a. 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/NL3M12403088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf170aed41ca5e637924592719d0704e4c6dd19fca65259c42befadc75a1c2b. 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/NL3M12405227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac25ca8c6e9332052cd36bb1bc51882f5d333faa851659fe02b88af255729c3. 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/HKE022211402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efbc275e82efb4ef7e7bf258f5dc0a4c70abeb26bac4ac8e5a4c22ff3d2587c. 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/HKE022211410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd423ec4e574ac952bb9e55b113188308565b7ed22b1c483ed3ec6d5f01fadc1. 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/HKE022211361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbad72255375617a62b203ffd3e5294abac9e96215706e8c57edb335271b052. 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/HKE022211276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31efee2937b79161505f5604ebcc5d4324626c8e7342d6c2c54031abbbb4fc82. 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/HKE022211264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cef4c59c7bbf0738e0cb74761e03bd3c36d4ccffc52b631e056fec11f08aa8a. 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/HKE022211224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b646666fa912b524bf548e7f635148f97c894cb2b96906455c9e3fd6ed52f84. 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/HKE022211144.