Jack "Legs" Diamond (possibly born John Thomas Diamond, though disputed; July 10, 1897 – December 18, 1931), also known as John Nolan and Gentleman Jack, was an Irish-American gangster in Philadelphia
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 0xa5f59c6627484f32977b162e8c53e191e0581ebe2cc0935a52781960d24ddf39. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc487a5b-2020-4875-bf95-ca86f800c5cf.json and https://artists.proofprofile.net/proofs/artist/dc487a5b-2020-4875-bf95-ca86f800c5cf.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 0xc4afe239d71551d371a10e7070bd637bcbafd1ee170b7e602173364327035144. 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/USL4Q0776171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e405c094ee3736aa07799168d6e00dcf044f40ea304887ebf5351534b6ba7b. 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/USL4Q0776172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c2f17dea52986d0b8b6eb7098ebf668324b2343034bcdb9d9194c58220d024. 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/USL4Q0776446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279ac17b5dc3ffbcbf72342fc7a34909da282b99c8b17bfec02a4f388392bf06. 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/USL4Q0776451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db333a0044f4f697694a8dc98c8483a8f0f55b8f07488545d053f05b28546e4. 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/USL4Q0776447.
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 0x8ed70925edb7a2244bb82047fd581d5a78f73c988aea7ae27d5ad3fb24d44cd6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USL4Q0776448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715cf57954999392729d5e999d5aa4fb02c33a87a624b1110710abc76ee11900. 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/USL4R0734993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe593175521d037ca3e66004835988b6d72ecd1e7e4d55271b253d0f791d5e0b6. 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/USL4R0734994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1f5219b0c61b28763b7bd4b4d7f7c4c465aafdbf76e65aaeac08e44228a525. 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/USL4R0734995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248e457d371e45401454e4bc745f7173ea2259862637b9274c8d7f91224333d7. 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/USL4R0734997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f248d7d8969ca969fbeb294f84ab8e999dc576344182424c24f8b306cc4ae0. 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/USL4R0734998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772ab2f67dad0546fcdbd342ac3365eb3e3c8bdcd7370962388065f422361f06. 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/USL4R0735002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3564ecae45b46a9552a0d982ecd95df9a1a25d407b603e8c43ebc5be9167e35b. 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/USL4R0734996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf0da4f5b391274b5cff44637f61309bf1a3aa0dc486de5d40e9f3dc098dd50. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USL4R0734999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d83c5014a7fd17cfc3b33fa7f2c14443013157a87c3cb4430e693da1f9332d. 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/USL4R0735000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5beb36049e1347d5e9a2619ada03a2d41204295a4e3e95f9885836a94a6eb9. 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/USL4R0735003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66c72cf17cb587dd14eeaa0706dd26b3c92fda31243fffffe5758092b55a0c2. 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/USL4R0734941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dacd6537695119b708b889401822e4f060ea7e7fab7cf7dd79779e7bbafc1b3. 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/USL4R0734946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902d98f0bbbd1124c861186ca46e11ba50338816f8cf1c1e65d60b3a33a6186b. 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/USL4R0734943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9f7d34974e61b5ed914e3fd673dae0653411c340f5b84c33729b6974a20fb0. 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/USL4R0734944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfb5746bbe76ff4eb8c7b604bf02bca2975e5742c28dee967fc41bd68278338. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USL4R0734947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dabf266d62aa3a1cb4174d37fd3618052d48bc46344011cb671b2a1516aefc3. 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/USL4R0734949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970d6aba8cfdab7a1494bbc35a7414b0717553c756bbc8e4d5479fefe555dbed. 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/USL4R0734867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4919e383a87c3c9d94bdb1457dd235f1af67b3ce9fb290dec51eb14d886003bb. 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/USL4R0734869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a97a85e68112673a9e9b33a214dfae873f184be6d4436beb26592dc020fa0ff. 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/USL4R0734870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea808727dd33d10bf4e7feb36d8ea26c81f575f7994db9c1a09afd1af28a637. 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/USL4R0734871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2498f2f3eefd1610bb155770982027f1454138184db46265ad8c85bad63ca513. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/USL4R0734872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55e07990962f67111948d693a6bba46c734290f998876bba7052a7ad364a437. 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/USL4R0734873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5345f0ee4bc7c40a29ed18bbe17eaaee42309f6e96a7666fc995d82a6e3b808. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USL4R0734868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d29712f75f6030871f7508f3260e281e1870657df87689306a82dff2b2e983. 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/GBD8D1700701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b84832fd9dbf16ad4aa6da36487aa34cc43a974403944352c91a4c65eb3ecc. 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/GBD8D1700702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a573e45f016e1cefc6f13c181315b69d59438c5638417dabff121e0a9d85c3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBD8D1700700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3bba403be35fb052c5466f91b6e363781bf0dd812fd7ea9e269e7f5cc4fcd3. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBD8D1700705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f378b3333c0e232c51ee253e7aeb67c64878ecf215ea7c8dec4e8de2e1475b. 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/USL4Q0729693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3689514251e323c74ad8fac71ced6043d88d7e4b17b0d437b3a1d568853aa8. 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/USL4Q0729695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb423023921ed50cd1136d44fb143b5da057e71909ada71704281c08bf86f7d7e. 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/FR53R3500001.
I'm Crazy 'Bout My Baby (And My Baby's Crazy 'Bout me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1952b6a4ded90eec6a234ab35eae8cd3dcbd58ea74bf772a789ac35f68cc36b. 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/FR53R3900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db3def59b373c782ac2cb409fda8d061a7e5188d4ce0fb48fa058c19af89dbb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR53R3200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9bbd5e8fed769b38d5ed98e3b7aa11a1948ebb059dda4a1689384cf93bbc5d. 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/FR53R3100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d39430f0ad5843bf4bd26dc981042965465bd1204382d75c7232f03749ae18a. 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/FR53R2900001.