Calabasas may refer to: Calabasas, Arizona, former populated place in what is now Rio Rico, Arizona Calabasas, California, city in Los Angeles County, California See also Calabazas, or West I
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 0xb25ef36db22a30153573a155c71239201280698ae51ebb2c0c97352b7bbe8186. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b4ca203-bd56-4691-8a02-208c5f2b5431.json and https://artists.proofprofile.net/proofs/artist/0b4ca203-bd56-4691-8a02-208c5f2b5431.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 0x51405e49017284f35f33213ba07e437d4f149b3fae7712a6a7b656adf4ec03ee. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMGR32299875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51405e49017284f35f33213ba07e437d4f149b3fae7712a6a7b656adf4ec03ee. 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/QMGR32299875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e491e5776fcc4725eee748a804d20b6a7b6c87473e38fdee42b36b99c7fe13. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QMGR32208193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d84a12d27b88c0f548c4d242be7bc3b54c5945ab0ef4b4d3bdf4c5dc9fd159a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMGR32299870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60805115d341734d13fb6ef1e4f4a0ef2a0872746b9e1964a20514dc3c8876ac. 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/QMGR32299873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565a7a9468afde63e83216ec39ee55ef591f99c2e836cb6b7c46b811232120be. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QMGR32299872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645a6d816d72319937e786dbc1aaa77517cb0bc9daa3969ec542ed6095f15f5f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZS7J2167352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c958c7996efacf787c0ca2be5f5dc304d9e8affbda1fe805d0e026b10c7978. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:10:07Z), 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/QZTLA2259126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43ccb498dad432e31a65e0c5f8056094fcca8ab7e822033bb1f258206fac5db. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUG12207401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca56c0311268b300093c5fdf8656e9f3c914eaa26265638624f06d9671f8634. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USUG12309050.