Jack O'Rourke (13 July 1928 – 11 April 2008) was an Australian rules footballer who played in the Victorian Football League (VFL) in between 1949 and 1953 for the Richmond Football Club. References
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 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 0xd44b28d8aaf6ed89ce1b1cf5fc2843c980e8a59d760e29731c6d4789af9f8a78. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17a041c4-d481-4f3f-b25e-46a4aa8d86c8.json and https://artists.proofprofile.net/proofs/artist/17a041c4-d481-4f3f-b25e-46a4aa8d86c8.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 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 0xaa33110976e6b812f32bd589d67a3fd35969c2799f2f9df8f3ae6c4f7a479e63. 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/IELEM2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd7a4369a9dac698707a5745479fe5a4a0730c41efc12fd1f9a914a7da8b8da. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/IELEM2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9483e72a3c088a89a07b195fe19e037fd45c1d4e677fc0c48f5afa484a6217. 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/IELEM2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d620b804f7d43ef8071389e8ca578d7dc2211421ae6ebef6ddf50128cef85f8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/IELEM2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb68168973337b1e859e95e74940d4d39e204d1c2429fe0a6fdd8619ba8c044f. 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/IELEM2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071b5968db2333b55b6e2ef55528037e7f29d69e82dc6d6e6d4d15c5299ccd68. 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/IELEM2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b10a3185ad5d51da65e0c1f68f6908758c2d32fdfcd7439b554edf388dc4b4a. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/IELEM2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1218cf88c2d6104b7788577be21fdf01da00488636ce4633143b119f506490e0. 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/IELEM2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2de1b4a645cedcb10fb211fb1e4c35f21b36f335c13a325b008648df54c6460. 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/IELEM2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ef42e36d793e28c6225ca75ea4c27d318b158c71ed04034d6aaae636de296c. 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/IELEM2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773e86ca28df132f70f007c3008a86a4d24f518fa257dccdbcf7996749051f5e. 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/IELEM2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fb7db899d09ff818193cd08c8f4bd87ce514f9cb79e3572b099aa644c1b281. 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/IELEM2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0227c569c396ed508f89690f431a0711aaddb4c285245d6a7b34d2d0b8566e40. 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/IELEM1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231069331256f68500e7ba4337296b8b888268d2acf3a242861e4da098166364. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/IELEM1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05a4286cb52880dbe2cf2dadc69a4537b925e2bc00ff05dbfc7473c8b72cc13. 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/IELEM1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752c276cd64735f9a00d226034286601a794269d9009c3dc43b80cfe75ecf785. 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/IELEM1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3c4fd6516cf9f299ca18bfc3e6b0fc51991647ccbe4d25bddb0136d1c3c7b6. 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/IELEM1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3449e8a24c44fbd94c45bd01abb92d299a583468fe72ae9260889efb8711dde. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/IELEM1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31099056a003e55b47f5ec443a8660a14e0580aec3106731ce61835d717617e. 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/IENHZ2000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9383896028171ad1b6717be33178f0cb18cff7821fc0dbf27dce4d99c5440907. 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/IENHZ2000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728b8b29df9c10e4168ef0dde0fd13f69f8b7c8d2f4053a2b81275c9b962b4a9. 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/IELEM2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c63feeeb12c08207a450b8a13aec57dc27b6750e7f941b90d1c733d5751f7f7. 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/IELEM2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c5c4c548dfc885622dbc513f30fdd15693b2b0fbbe2971d525c78e6c5e526c. 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/IELEM2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fd1b30df34c4454ea51f4fd1926b0f4d3738f627232d60edd024f1382c2fac. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/IELEM1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce31f9b486acff3d1962b2fb39b6ab72a8d53c791ffd43ddc5482b07b05b29e8. 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/IELEM1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394163ce2c293fee169a1d28d33685f6209a574cb1143a0f4372f505efc29cae. 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/IELEM1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71ab54a6d58cd77ea294f7aeb917907d5b0b61d788d946f03455e0b288cd989. 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/IENHZ1800010.