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 0x85e184f5efff82568de423c48e2b1bcdd44bd4c13cdce2cde5b91714a3294efe. 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/5755f99d-8c75-48b6-adec-a174ee85774e.json and https://artists.proofprofile.net/proofs/artist/5755f99d-8c75-48b6-adec-a174ee85774e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
星河长明（《大内密探之姻缘劫》微短剧插曲）
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 0xcfc7d63780c6af282dba8397f879bd2421fda5c2f71888a4d122016170c6fa14. 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/HKG731647274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ace429ffe8e144e776e1f607af565dfec73a97aea218c4dcf2f29c3e891db6. 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/FRX872206215.
少年白马 - 《少年白马醉春风》动画片头曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff2f2ce25f07551ea261eb3ade75600b2c1ab380b1c9c069e4011bc7e7e991. 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/FRX452202440.
春风欲渡 - 《少年白马醉春风》动画片尾曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d0acc36bcc6af16ecbe563890cf853cd3a4822b8e9e4382eb5351b0ebd74cc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRX452202441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a07c0ca181d74cc945a28ed0ace9932013a9102d6bef8fadd9179257b84852c. 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/HKG731528177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7415cc4adfaa250a3cd7d2668f14c0ca2dc020333b0c71dca921633d71c4a343. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HKG731779537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744623d90a82fd0e3865da6d1ab8e8798ee5795c3cfac30f64746273822d816e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKG731741619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e8e1f6b41b8751721620cd545b4cba876f9db98c2aca2a5dc0baad2579e98c. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/HKG732112663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c23bc7451b6fc38dc8148cea1286bb82568d21d0f175835b1b661430abb71bd. 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/HKG732111218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439e87159a0e2708d072ba9804a6735210111edaf8d0626d8411f080c45e7567. 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/HKG732111219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdaf020e12ed4745844234dd1fc626e2014914f12bb62573652b9a3acca7387. 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/HKG732111220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5156ed81830644b6e3e40bd990999594176d171b6e2a8140a7cd3081ca18e07f. 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/HKG732010163.
青龙引·乱世江山（《青龙图腾》广播剧片尾曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1d8225ce1b288aeb49942985f067846617e396c8b0a8be03ef96267935aa2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKG732427971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b1181dfd81b31d4880fbf17ba7249ddf0d4734604b4d19a337c74daf2527f. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/HKG732010164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2461a07c3008125697fc0ab6e53b94adf8d0c169dbecfa15ce04c67f9a189cd3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TWCT52324694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47b0e1e546c1bf202ef15e794aa421ad7f38b38ce284c32052c79e80e1a11e4. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/HKG732027554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5369596740846a4ec92408b05a717c49e5f89fc7746cb5dff72d439246e230c0. 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/HKG732027556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebddf3e2072ae46a9cc16bccaadcb7da5aed3be59f3ef138df710d4fa2f9f5d. 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/HKG732027555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b78a31ed8dd48e7f281afe966752d2832efa63916ca3e4459e482c80c2d6663. 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/QZZ972373197.