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 0xaa6ee4c188d8d231215c641a14dd0592aed7d4c572eafe800db0bde3a7282af3. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51b7d7e9-29da-48e3-b89f-d2936ce95d6e.json and https://artists.proofprofile.net/proofs/artist/51b7d7e9-29da-48e3-b89f-d2936ce95d6e.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 0x585b6998c83cd903a9c0bf7c9d2977b4ece3ad3c290356f7b51b36338ee661c4. 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/HKG731894395.
桃花酿 (《偷得将军半日闲》网剧片头曲)
桃花酿 - 《偷得将军半日闲》网剧片头曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9984679cdb514ec459c3bf53b1f1ecfffbc6b600bffd3b90347322698da74b4. 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/FRX872439479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bed1c0ee2247be5744e9f275e35f64ab637d5033f7e296441d1af0de426586c. 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/FRX872439487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e6ff5e54626f5a977c112e0f786165f8ccad8ecca37b69e19b9e469edbd500. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0L2375578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426ea9ae5af67b7d1fe143ef80deaf189efe9948b7681018a4b3f67649d7eb39. 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/HKG731868634.
宇航员的告白信 (《这里禁止恋爱》网络剧主题曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476c51664cba44574f8e1c9b267dd7676a0ed961d4df046f1b3b4ef474b1c805. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG731734094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4755350a6f04adde26262364c6c06e159c40f5f97bca97cbddf707c5c5a9d064. 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/HKG731720522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a0538ea75b78425f61fad255c2c66fa6e55a170b4dbe349fe44fe37bada9fe. 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/HKG731894402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f1863556d5d876ba7bbae5ecd62670da8e21e35eb5df23658af1dac0981d1d. 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/HKG731894405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fecd54ac9d0ef20327437ddb0688a80a805f3e6c057c9167f6bdfc5f62e90b. 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/HKG732136478.