Chamaeleon ( ) is a small constellation in the deep southern sky. It is named after the chameleon, a kind of lizard. It was first defined in the end of the 16th century. History thumb|The constell
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 0x674a10fa9d2338b26c459c80efe34a4e28fd8026903f398be96fbf954aefb7aa. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faf8a3c6-3b80-404f-93a5-728b10a3b586.json and https://artists.proofprofile.net/proofs/artist/faf8a3c6-3b80-404f-93a5-728b10a3b586.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 0x340e16850ba29c74abb01b3a2006a5a25b7faf47a29483fcd7aa478d51cfc9be. 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/RUC002100196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73462ef7b6878fc368c7512e89624d8d7fa576409fcf2a7beedc88414a937925. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/RUC002100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba005cb27577e832851e949a6274116a5320854189961aaaf8d2e6349ea305dd. 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/RUC002100200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5c9ce10ce673d7036b6c68df724a8c33d483970dd64eafe253eb6179c36d91. 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/RUC002100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a3af1d6e63f6138ab88ba89fbc7b01475d71da4402a209914f344d6adca33b. 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/RUC002100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3ca3d7b5f5780a532d2dad1a6c23454b1285f71e8e5b1f5d5b8196b16d4ff7. 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/RUC001500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dfdfe06afdc954b751148f4580a8e062f45fb04e5c493911e3053d45465705. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/RUC001500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99145591a82c8c333237b7c93ff0a15ddb19ca46adb114b1fee9da88631f406b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/RUC001500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca525f88f90374162111fec27fc478bcb1fccc4fd76c416cef4e80add850780d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/RUC001500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76963d342b5f361877a835ef65734826821beb1e40bb1ccafa24dfe43b4fd56. 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/RUC001500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d591a7253cf8e89c1cdc371b4d89b3629181e0bd7d9c49d11056ad5ce3ab3c1. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/RUC001500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa411a2fd76af1341839de34d67781b8e400c87ed14435637a4edbcbbf074b5ac. 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/RUC001600075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8849b259547a67a3f763ee2a36f9e25a573bb9f0aa7f280a392a44a84ce45f0c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/RUC001600077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03239ba99c704ae662e4e03e21468af09d9f0ae01cbf674d0399ac93ada77fd8. 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/RUC001600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa539c79051e8f06013d753c71d2de2a17536cb8779b8ff73595bb129a5071960. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/RUC001900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76963d342b5f361877a835ef65734826821beb1e40bb1ccafa24dfe43b4fd56. 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/RUC001500038.