Yoko may refer to: People and fictional characters Yoko (name), a Japanese feminine given name; variants include Yōko and Yohko, including a list of people and Japanese fictional characters (for n
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 0xe020fa3997a8291ea15e7f506d096bb9ebaf6aa7327117689d689b60124b4911. 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/05a001c7-ac44-4221-84cc-88b080ff7669.json and https://artists.proofprofile.net/proofs/artist/05a001c7-ac44-4221-84cc-88b080ff7669.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 0xa37fad737f0bfe417edbfc508301218145029d3300329259e5c62a41b66037e1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZW9K2466129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa838bb8595d6708abe743a36f7003043e99ab7aad274ebd92459aeb8446bcef4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZW9K2466130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0a41e1e5793e90217a7c3ef768860c067cd496291f495cfe0f34d6211eb290. 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/BK1YJ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11ea541e734613001c04c5cfd4b855e9f0da40b55a0825649f64b757a6cd37d. 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/BK1YJ2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95161bfe0e2eed09cf196db113cf39074810a01328c7886fc53dff42629d573a. 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/BK1YJ2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df2d87194ba0ae856f30f188227f64aca4f883d9c027aad2ad2de03ae9444b0. 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/BK1YJ2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3111e85f44695595d311686116911b01736eeb0ddd45e62789e50c51dcbee3fe. 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/BK1YJ2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab2a7d03cc54e234c497b8b24d3123be463c442eca83f91c02705850e6ea905. 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/BK1YJ2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00842bb85e0d2d652a1ad8733aee954e8c7796ec572d446bbd45bca89b9411f. 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/BK1YJ2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2676331863dbf847eace14c241a4b21732b24538d41e09c77f32bca9d24c7f84. 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/BK1YJ2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df883b498ac8a0cf2cfda876f644d69b64ddc83aadea6ec2e214fcda9889b3. 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/BK1YJ2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58067590a60d9d1102c3979fe2953ed926174eec753c907cf064811e5e5912fc. 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/BK1YJ2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67450748aef22a27c212c3d3b5a51d00ce6c690d18f1a11daabc0a5d3c1efe9. 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/BK1YJ2500013.