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 0x6e02d23ee22ed366fb96053b4509789d97e2b492eadf99e8e744dd2ebbe474a7. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f606946b-612f-4f3b-a8b7-d25b4323ab2a.json and https://artists.proofprofile.net/proofs/artist/f606946b-612f-4f3b-a8b7-d25b4323ab2a.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 0x6177e125d35ae7a1a57481dbead2e15bb10634b32a17d811f0338419a8e004ec. 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/HKD250616603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b22332f8d2b8605f2b0e018c8dd0b94871ab945e521bea05e2012f98da80c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKE059400002.
魔法咕嚕咕嚕 - 動畫﹕咕嚕咕嚕魔法陣 主題曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc652badde01ebc456f85a246dc6424862404544c28f64608e54ef60783e8f1e4. 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/HKE050030807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92b39e3b1dac70887312b790546b6a1d7c7b606212de24437d294855363ab73. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE050031115.
皇家雙妹嘜 - 動畫﹕皇家雙妹嘜 主題曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562021641fe937ac4fe59366a2e0020a28a3f17136c71d6df2b68f28c8b86116. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKE050030816.
愛心一百次 - 動畫﹕飛天少女豬事丁 主題曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87be6734d1425b53f44d4c6c4d30e065f92513bf71797c9a7512e629325c5794. 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/HKE059928516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1227a0a216a2d84342f83b9327aae43928c0d8a21d82a2c41317a508ed1e0f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKE058800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7853dc4ccc12ec8a4eb73aae145e593b331705a36461f479968e992e72ded28. 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/HKE050030803.
小丸子的心事 - 動畫﹕櫻桃小丸子 片尾曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e1fd02d2e9d99e88fd797483569e7e5380a9abee8e0613867db0ba0c86cad6. 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/HKE059700001.
彈珠人的愛心炸彈 - 動畫﹕BomBom 彈珠人 主題曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027a4f53a31bb92656c036c1324fc3b6a4b450514e2dd9f20140bce908b49022. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE059929512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711d159e4e35fb0449c84e9de1f6e5614de4cf2fa64d68838aed7ae0387dd9cd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKE058502106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92b39e3b1dac70887312b790546b6a1d7c7b606212de24437d294855363ab73. 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/HKE050031115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3db7446aa9d7f893ded73da722ecc44e56f730c5f846b798e3773ba723d45e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE058302106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d678df65e0cf9ad13200a65bab9e1e243c40b6f9de76e928a51632694da997. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE950000001.