Astronomy Class are an Australian hip-hop / reggae group from Sydney. The group comprises Ozi Batla (Shannon Kennedy), Sir Robbo (Shane Roberts) and Chasm (Chris Hamer-Smith). Kennedy is a member of
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 0xa62918b34923c43d6545ece9da162fe5d31ff81ea8380756f095800aea2aabcc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10ce1043-ae57-4189-8800-1180d648ab97.json and https://artists.proofprofile.net/proofs/artist/10ce1043-ae57-4189-8800-1180d648ab97.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 0x06ced6cdd0701c6ab137e660481a7692475766df78f786ad51accf397f823807. 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/AUEF00500363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a0ae029d4dd036fc35523d02a2a4678e4736b6c15f2606b2f04a7a129ba638. 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/AUEF00500365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5f3be6ec9b90d782a390840b0cb8947e0eab15fdad9b31d6e7bec80630076e. 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/AUEF00500366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc933bb6d7ea5b6fdc234b93af009d5f08c517a91e387de874264f5a47f5e1420. 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/AUEF00500367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6fbc85d9d60facacad218a38190fff2a90d15e67b270f2c1102421959d2e5b. 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/AUEF00500368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4df48d0684fb494e2a7f01803df38ab0f412d1b575df276b730ac5fa7d1cf5. 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/AUEF00500369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26d9c5a421b84b651c526dfe914f479dfe1d9b31aa793063230003df8d48ea5. 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/AUEF00500371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bddbd1ba6968520f93ff21802820f1511c2651ea0c75d8ccf3b564786e878a8. 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/AUEF00500362.
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 0xf7e3d9eb334603877930df130c98ef66d0e1f6a583e2c23d6fdeaf4d37cefa67. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/AUEF00500364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e018810e7dc389259dc070c406c6c7120e136e2193f695a71c1c78cb9a1be5e. 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/AUEF00500370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198c892ca47f570ad35ce7d92b1e9916d34b32b0f504d032990288f5cdfc9916. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/AUEF00500372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a21b83cc99d06ceb1a9467990e6589951e4607f1e0a23352c7582d3a2f0c1e8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AUEF00500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4808532e82f6020dd6a3fbce7b5568718271c430ed5804dc161c493e0955c0b3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/AUEF00500232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccd9e95b3d1d70dffa0f641459b8300ddbd89e1ffcf3dd1c2c3d6a368144bc0. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/AUEF00500233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56d297387f1db3d337d590f4eb30dfcc1474145b874855db10524d87e7a2773. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AUEF01400828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56d297387f1db3d337d590f4eb30dfcc1474145b874855db10524d87e7a2773. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:20:03Z), 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/AUEF01400828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7f611b8a9c1401553a4da20d537d28929676d8c7ddafbe87ee4ecfd5452bdc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TX2216880.