Skycity or Sky City may refer to: Businesses and commercial buildings DJI Sky City, a two-tower building in Nanshan, Shanzhen, China Sky City (shopping mall), a shopping mall in Zhubei, Hsinchu Count
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 0xbca923cfa8727074d5e88e01ef3105245c7024bf0496bcc0ac2441f5c494b522. 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/bd4e0b47-e2ca-4e9c-b5a7-d29c51b5174b.json and https://artists.proofprofile.net/proofs/artist/bd4e0b47-e2ca-4e9c-b5a7-d29c51b5174b.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 0x6ab0506050d3d13fdc71a0d86b1caf3f367a8db8ecf557a0b1af5e63db4e103a. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/GX89G2332473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3047ec817109452d3952c960dd9ac90fb40b086711723cdac83bdd150b69f7c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:58:42Z), 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/GX8KD2305265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cac6aca845d4bbccb620dbf8d85202544c234c3649b6c3f20a7295eb787e50c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GX8LD2339866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b228e06b49f2fa602de7b71822b35d460f7ddfbf4c958a9733852f4b0230a8. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/GX8LD2386945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c7b9fe9cfcb6c70aa902c59f912fdc81ccd93b8339809f737b6e5d9828152c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX8LD2349529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f37c7a0f022ced038c9d51de366f77dea6b0d277c005d8a596f92a8e221d796. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:36Z), 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/US3DF2453849.