Kader may refer to: Kader (film), a 2006 Turkish drama film Kader Group, a toy manufacturer of Hong Kong Kader Factory for Developed Industries, a defence manufacturer of Egypt People with the given
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 0x40543876cb702910f95e239a132fdc376b77aa9f23682a6d7c7861c82d23b0fa. 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/62d71860-3ab8-46f3-a615-2097bba5779b.json and https://artists.proofprofile.net/proofs/artist/62d71860-3ab8-46f3-a615-2097bba5779b.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 0x94c48dc507000efa65bc841fe60ec144b33dc616362464fd365f91e7177ace82. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:07Z), 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/TR0630601029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6f0826d98416a274c88422d4e1e07f756f078a020834a0b5f6a66718ac5bd6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR0630601044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56eb3cabc090ed646aee6067a915a7c40edbc89f3fe83ad9381f8f19c6ad67e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR2320600097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe0900aab64ee4d706b7f6e1af928a122a4813fb0917cd8de6b44aec983f072. 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/TR2320600098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42067caaa99b2737e4ef245447f8b508e44bde3dd2856f3b6b968ffb65b1c937. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR2320600099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b1e196360b431ffa46ce023cedb3c4f1afc751a1b38c5591b41c397aa8d627. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:19:25Z), 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/TR2320600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cff8850ff358995602d21b2957a78c6d728630e44c9dbc4aee8bfa3f3d03a66. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR2320600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab54e8d0473c70f33e22315edc8390f529d34e6b8f848c5b29bd7005eeb11fb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR0220802713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9ea117441054ba9982c5e5b8a0a27dd711bd1df983a66fdf6e3af5df778a27. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TR0220802714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86116e3bf695ef60542214bcde05c290dc03c1a7d195db9d6e627751344fb32. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/DGA062200641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76afcef734ddbc27d7f865413cc2eba9cb3b1fb47240632dcfe77cb138f0f68. 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/TRBTU2400260.
La fille du nord (Hommage à zouley sangaré)