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 0x79c7fb8711853d63dc92520b909beacd4e6dce8bdaf2d6e4578181e04b2d8aea. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f8c28c3-19f0-4d1a-ab02-4b551bb28bc6.json and https://artists.proofprofile.net/proofs/artist/6f8c28c3-19f0-4d1a-ab02-4b551bb28bc6.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 0x2817a4140c39b94f2229e55f83a9c3e570795e7a5c4421502559623697fce0bb. 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/FR7JG1600610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49668682bab0be1cd086fad1ca389193859927f6dd9ad461fa8ae72640728901. 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/FR7JG1600620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc707936d481365b5bbb37dd1aaa63d90950f16c1e521aaddc72831551430587e. 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/FR7JG1600700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7b0b63f975e522a840dff976210247d089041a7809fa63472bd4f1fba21e1c. 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/FR7JG1600720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf899d64ff5d609205ae1a733b88d211bbc6f30a280416f8f787aa7da3bae38a0. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR7JG1600630.
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 0x74bc5a19ad6b79daf5efaf9ff3217310778961db94a3c2e85c70da14fbca1e1c. 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/FR7JG1600640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c87f345975528eb52d4c5653cf3a376b38683b0627788cccb5d1a44614a5e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR7JG1600660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78684fc2e2cef47a6cc0bce876034a9ac166ccccd5f22282daf49d467bee48b2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR7JG1600730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8278cd7fd62b5bebf4e075ce7ed17236d9a16904d55abc7e6c059b86c5ea22b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR7JG1801790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdf56bf3de5f01f9bf52a7d7a9acd1da93f612c24c1b74b138b9c3ef4ddd05b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUA152332204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac40e9be453955902a28a4dc860e92b3d9d3e4d9ebfe60c6bf2793ba3dda57b. 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/FR7JG1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaaf425cb44ea208f0cb2b8dfe134d5f516b7e03c8744b1ae344d393c39d57b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FR7JG1500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca935934ae37ff96142c27348a426387c577410cf3b9d8dff224cc72f70d3cb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR7JG1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e04aea2f104f7258cc696b57e02813e2f4b91653fc86a2541f804e0f23d95b5. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/FR7JG1500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d819c8e1bef2a79e5d32d7109daa29c9c876076a07fe94acc00dca228b848c. 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/FR7JG1500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37243ba4eab7a4ca36559af94218c4b6faf67206ecd323081172fc7ecef5231. 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/FR7JG1500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e26f7c190b9ee17881db4c069bbeb4a357ac09ab81ae80ab6d301d5c559bdac. 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/FR7JG1500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a600d7d70fb7bb4e69c05860d9873aa2271e31efccd63f6fa5b3c85e03752e. 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/FR7JG1500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c7a83c0a7154686c4c8333dd806340fc8e25e35eac747bdf1d7e9f6da41422. 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/UKN6R1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb8a4f77c5734a7631320a7fbdb8e2af95fc3d4838f88c78676d3f91caaaa50. 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/UKN6R1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79452b2c7fd5f54c849897c26980a6987b71bd7ca0026fe9f639e97996cf1fa1. 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/UKN6R1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3ea5945971de74b07f2dd966bf6922b36812f30b73796d6bdb60fa719993b4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR7JG1500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155ac5c126583fb7b5113bb10cd12f499dab1e8e972fae2c3d776f0eca506faa. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/UKN6R1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39daacc898d44f8f9d801fce79af78452c17e82c76c23c204b92b4089920dde0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR7JG1500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f3dcdd052be87e3526594a61d3c0db702d4b17c5994ddf4d9aa9d71429d0f5. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR7JG1500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421a5803e3e507fdcde58f2c1055e620ab67907ec1e0acda229f10967652a369. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UKN6R1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989a0c77f9cda80c5784380f1b3dff4978ba1a9f1cf106067d1573b5b163f0d6. 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/FR7JG1500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774a0c7202c5a4639a3f2d234125498a918977e9264ccf7e44b5150941159ccd. 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/UKN6R1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916919ef39fe52b67143ff4f939400d6c68aaa6665919fb248cf9c3d4c044d14. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/UKN6R1900009.