Sakko may refer to: Sakko (clothing) (also Sacco), a type of jacket Sakkō, a Japanese hairstyle
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 0xbf00b1d1f42caff1164c78aaf83bc22d9333d586257a96cd244b90286693f3c1. 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/959eecf7-31bb-4f45-a1b3-698921b64f7d.json and https://artists.proofprofile.net/proofs/artist/959eecf7-31bb-4f45-a1b3-698921b64f7d.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 0x4a127259fe529687b3955cec2c62ad52bba03f721756d818573036f9200780b8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB8KE2414688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03771e04a38fa551f70a06008f9bd92bf21f01bf9f2c8a525fb4132d7a43acd8. 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/GB8KE2410796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2461522a8190a8cb164a824532c75f887623f7b02d3c298f0ca212e8ee165ab. 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/GBKQU2414920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c06c3036c6932571897c57140d123335fca372f2e0e03098f27e667afe9bd4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2413167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21882627f056372db556b7382fbd8b79baab1faa3c619fa45a5293fdd26a1e9. 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/BE8LH2300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06ef5db4c80accd6f260261bfe6d916308d553922ef9790091a42feff4fc211. 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/SE6TI2390682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b150e0210876435a1f2f518929aff743477403a915a01a2afa08313fb071331. 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/BE8LH2300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e52740bafc20016e6eb43ca3cc659c894d6eac3d81644e9420c7c3d735a2ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6XW2314145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72ace15f8f5828bea7233b7ef7ca1774adca07ac39b5cc41622eab7dfb78684. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB8KE2504376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52b51492abfdfd09606804cb8ee7b3607e89c49facdc9a2e45aef739f1f7ad2. 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/GX5MY2427685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f09ba2d2aa074f20bfd6521db7b5dd7a49d59ce5bbd8221de8abfb36698f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB8KE2428037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aea4f637feabd585e9a6601be9d6492b31bad17a9c47767c80fac08ae396a7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL1ZN2403347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd635cb974a15b317cb75ddabb70dcea8de60f321097f56164b68246be3daf1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLRD52421908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076f13a197ac77f9e6f94bffc4858043d84309efc03d8a417c38ce9101ca4bae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB8KE2421335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4162278a5a71a9229138a89116f964a4304caecc1cbe6111556aa1a154445a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB8KE2417548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1798ffa0ed326cb4a1989a3d21458ba642fd1e81dc092ac641d72bcb11aff0. 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/GB8KE2414340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fab3914179ec241557c7e53ecbfe73a8aed9d699b2cbb1c92d84cb41ecf5ce0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB8KE2414358.