The phrase "coming up empty handed" is an idiom meaning "failing to achieve a goal". Empty handed can also refer to: Empty handed, a song by Lea Michele in her album Louder. Empty handed, a song by t
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 0x4e261569b4a56b348eb0a12844268f7ac59609ab2094afbb0221aae269b3b603. 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/7356ce90-2238-497b-8315-e9b788430d3c.json and https://artists.proofprofile.net/proofs/artist/7356ce90-2238-497b-8315-e9b788430d3c.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 0x5e1b4aec6ac0bcdfb9cd0f7c0469bb6b4f882a8c8af87f47c6c8179908ad128b. 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/TCACK1502879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28519b434645d2c98a0acb72414729babefab9feeb44d32d73a119c22ddc1f1. 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/TCACK1503054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c25911933179ce81a67f7eb15a871a2d42a4da5b0df6898e718d1c8f0a1978c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCACK1503055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78226dd79f1fd62f5d03c3a87bb0928aac88561638f246b8ba94ba52c0c7db96. 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/TCACK1503056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea88beebb6e15a8e1f08d78b328cba2554c01a3aa2b3c94aafcef134555fe478. 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/TCACK1503058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5b1fc3e99b374b817f54cbb2328d124bfabc492028299e3a0a2eceddb9fe04. 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/TCACK1503060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bac8674148045417ccc1ab2b8e8ca88839623d1bb14530863d2478e0d1ebfe. 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/TCACK1503061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff14171e62771224668565cd5ad4b398e06965f73813565f9cdef39b02e2a75. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCACK1503052.
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 0x262bd563abef9faa1d43c2a2554a447a5486e5878554230ba53565e989f848a5. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/TCACK1503053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa8d107a38f1e63647c99e239d4574bac711efe3cd50fd09947b1c0c6dbb8db. 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/TCACK1503059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5a564ec0f4447e92257c5d05fce65a1df6ec47d6d5ddaefd6cfa7a333c1877. 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/FR10S1487422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2b13b6e0aa6364395627b186d66da4ea0efa3d2944f3ecec69b56ccd4433bc. 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/FR10S1487423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65858db845e4eba8ca305389f02338c92d0c335525a6aeb1fe3a7601b4f7cbe2. 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/FR10S1487424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6394b9625c9710bda65fa1a507f8d4cf1e052cd125544dba89dc7c489e131d39. 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/FR10S1487425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6085239fa43dec7d510b8e85e7590aa21006a5c3f481b3356c97bcf54409a02f. 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/FR10S1487426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7791743f4b09101cc6bc438680b77ca6d681339f73f7d637d90ad4e84ac7141c. 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/FR10S1487427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d47ff3be87cd4b890c0120b88665e0383d26d1eee0255cfae0bbb845487337. 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/FR10S1487428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4843885d77c1659b51af03337b1713d8688853da5c5726b5ca31cdbe91f7126f. 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/FR10S1487432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b90b5fda678ad2385de2efb5daf42177c792a1ee92e1f3c728ddf949b68cb5. 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/FR10S1487429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad9ce78ec0761f5bf47a70a5eae0eef7d5c1f2bcaa391aa0746c8fa96235bff. 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/FR10S1487430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b055f4811e3348ee753eadc6254a9f7bf7a45f2392c28e2047b5a5abd370f73. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR10S1487431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5683998e88076705d10044bb070efc602b41932b0e491c1c2dc8a51f814b2d92. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR10S1491421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca5101f986cf6ac61a80f1c4fd16d75b98f6bd1b8b3ca86e980a86377eae3b9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR10S1491422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875e938e9528599d33178b8c3187330c03166b2036b69ae4185f312d64f6921d. 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/FR10S1491423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96e03fc1d8c72c03cf36f60bd7bd3e105aa76974b184d4ba0f32cf087b83af7. 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/FR10S1491424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a414d5e0aa1f2cb0faa405f1483ce5520e954a766e3326576e9bc2efab4dc45. 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/FR10S1490030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed0f06f170b131b0b6f49315de069f639bf209ba500cf7468d41c4a1eb30631. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR10S1490029.