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 0x160a1138f791336980ae48f3c288f64a020c44422ade7c113779c0a3869eecbe. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8ff4262-1ef5-4ef2-a410-51f6733f5947.json and https://artists.proofprofile.net/proofs/artist/a8ff4262-1ef5-4ef2-a410-51f6733f5947.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 0x5d6cbe69c9cebce435b998453b614f09b149319be3136b6c31de4134b6baf28f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX202202597.
二十世纪中华歌坛名人百集珍藏版—李双江（一）
二十世纪中华歌坛名人百集珍藏版—李双江（二）
我们的队伍向太阳(军旅金曲CD光盘)—燃情岁月
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5def97c828dac99ef0bb0a78abf89d4e2e4494dc9a90985add8ce739faa330. 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/DGA0L2393313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf015040a734f7317f24fe837e91d0665597f1deba56874b6d0c7bbd20fe1c0a5. 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/DGA0L2393315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03e11974d80a045753cef5b387108ba24d74b24215d7409ac76724507a2dadb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0L2388970.
流淌不尽的中国民歌—在那遥远的地方
神圣的战争——中国抗日战争救亡歌曲(四)延安颂
我爱五指山，我爱万泉河颂歌献给毛主席
党的阳光照耀着祖国前进！伟大的社会主义祖国
心儿在歌唱第六辑：军旅歌曲 战士歌唱毛主席
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd79629dc9a839f386480fb3a916c00715ff11203b87d4fc56425d301333247c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA012360808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa6d39ba26cf6469d633221030717c6feab51ffc753e8baf8c7dfcd42300484. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA012360799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e83539204c209f12eefb45b810bacc350d2eda37233ffe7841749a011c9d12. 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/ESA012360807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d0616ade893b13cbb44a951b09f85171459fe0443f53a2435b5fb7a7f2a0b5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ESA012375415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278a1b27b98b185c546350090b744e9411f082011794bdf8932e22d250968928. 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/ESA012360798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a9ed5f4586d2f11dc48d75337b63a43eb4b73c846823640286bf0d0d6c2d88. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA012360801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec92c89fe6da5edbcf619dae1daaf589c2b433eef6a62ba57ce31306e2518605. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0L2384741.
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 0xb7c63158572e6c397e072463ac97377b212433aee5223e38ecbb375b6f9157ac. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DGA0L2384739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005e14c7e1a4ed266e0e7e5cb1be77be0f167bc8026304fc134abcc4981173af. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DGA0L2384740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4ce06223189fa8000c5721b98e315f3b9fee203969e4301970c164cb72b9aa. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZZ972351434.
人家的船儿桨成双（电影《漩涡里的歌》插曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4595938ca9ba418be204f2975ea5976dcaa0b4426f66ff6f9e43928f167f680. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ESA012361090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40188fc9960ce4f46ee70adf928a0efb1e9855983b96abacae8f77f2122ef28. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DGA0L2384743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee694fca6f1229593bdd03161fd73f8ba4258be4958515568e39eb8862ca399. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ESA012360796.
当年古道响马蹄 - 电视片《镜泊湖》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be9d833a00490a69e168e978ad906c148f8822c103c3646d2080a21d69f779a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DGA092394707.