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 0xace5ae1c35bc24bbb16c7dba10569e8ef2c0866697ff4b5217d1d074635004a7. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/989794cf-5b5c-4db2-a60c-fba2afbe7465.json and https://artists.proofprofile.net/proofs/artist/989794cf-5b5c-4db2-a60c-fba2afbe7465.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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寶貝唱跳兒歌趣｜世界經典童謠精選｜兒童兒歌快樂唱｜一起來唱兒歌吧 (KARAOKAY)
寶貝唱跳兒歌趣｜世界經典童謠精選｜兒童兒歌快樂唱｜一起來唱兒歌吧
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 0x3d9d4be63933091e6e0d52a32028f99d2c7e1d97ccc79457b10c38ee4469899a. 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/TWCC32212046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfef1e5196fcfa906d467b297f5f48df2e6ba85ed800138bda3bf75e0bdf4900. 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/TWCC32212047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf529f28f3e3fa897d90a9fba0a922f80fc5f88ae325cb08046a1cbc8c20c28ee. 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/TWCC32212048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a046c5e91afc4962c9b28ce1b9e4c0c279890516efc1e3d0390b40599c09762. 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/TWCC32212049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c79a20f782896a56ddbc5cc5d12273a0b7eaf2b29351423dd792b405a9e324b. 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/TWCC32212050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516a7731e04442a918850d3e1d7ee2a381afbaa7eb35c07d58f53d639124d249. 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/TWCC32212051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12093f4dd55afdd48f307508f9ee6b59c8e8321154ac0c849747edece4081a1c. 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/TWCC32212052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02845543515cf82e1de174e996b3e7b8c501b91f026f1af5e2475fa62a49a5cf. 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/TWCC32212053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c4fdf16d4cec70b5aeda00918eab5576ce8f528926c026a50e1126c236eb08. 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/TWCC32212054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fe20aea38f4c6950b0464633ab84c62445b535e68b3ff3ea811dacb0f17911. 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/TWCC32212055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb256dc9a8b32681f93d490d02c705282bb35949c728e6b6067541c9453438b0d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWCC32106119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcfde5014f7ab8f3eea110da84c817e69b9fd490eb63f0c2027cc533802f795. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWCC32106120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb73dafbd7cef3754082008ab8e0975412878aef7d75003f025280249719b74c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWCC32106121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f4e6100267be817fae00a02b525e6fe75d06359458d44bedbf20e47f3600ca. 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/TWCC32106127.
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小蜜蜂｜嗡嗡嗡，嗡嗡嗡｜溫柔入眠｜夢幻搖籃曲｜寶寶放鬆睡眠音樂
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc228f894e0162789957973a83fb07c73e4c183d405b551a24277bd80ae346a87. 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/TWCC32502347.