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 0x245aac2cc7fe21144d3e5d7e55cbf3a717a401d1d9fecbf4e640f34758b55476. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/484d4bbc-a452-4469-b786-2407d9a2d002.json and https://artists.proofprofile.net/proofs/artist/484d4bbc-a452-4469-b786-2407d9a2d002.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
二十世纪中华歌坛名人百集珍藏版—董文华（二）
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 0xb73edcc147d32d301692306a2c692b8c4676801cd01cb55e675331c808c688a2. 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/ESA012360736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9c111878afd2e58a76c6a59eee0edeec4b23061ae8470290af38dec3c9c46f. 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/ESA012360738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4a7b17e0f71250238c41f8f50766a020c7eeb30d7d3e7b208e4ca5b825ece6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA012360739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e51867b50f7d7cd8f207261f87bda6569baa0d9107440176343c138bd1a948. 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/ESA012360740.
二十世纪中华歌坛名人百集珍藏版—董文华（一）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997ff4eec1d58a9dab916c96c7102327fd83e815c9e906ea5892eda9e96b3e95. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ESA012396012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9aeb73be88c7e3aa69873d3aeb607ab400427c99bab6545214f850dbe18450. Chain 2 (Bitcoin): anchored in block 957210 (2026-07-08T18:28:05Z), 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/ESA012396013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeadde796d2537304a3b7ee6a1343721afb73fb4ff683825191699566b33769. 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/ESA012396014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca00334e48d0106e68b94e2662d67b10ac573e849edcb8b5bf5258c498524b32. 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/ESA012396015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefd2b419abc875ff612bdbe4c43713a87444caafd645115b34bdb19a7cebeaf. 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/ESA012396016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003ee71d6d69b6116dc884970e7e89611829b1885ea1e6e28cc81cb474195564. 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/ESA012396017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611410f8232fa165f7f5a8632f1caeadd30a91407665e6c8a425233e9b1ce72f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA012396018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba6aebe097f090de63f2714a3ed66361879cf91fb22bfb07a3325b106205b95. 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/ESA012395970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737da88f51cb0cb77fe8049709e5e7e8c0f3fe63b885210f6b4e3cc052f0184f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ESA012395971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc69e49abd65bb777ebf41ab613e2e9930307d1c9113b76b3a36fbbb8a9dc69c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/ESA012395972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdbaacf8e01de3a076e8d83c3fd2deb42a6c20b5af4a4f3a96f9884c9c2f4d8. 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/ESA012395973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2e7d0479cf2c80cf53a8cd3584cabb5828e2f892f7ac16509b446fe4421cb7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ESA012395974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3d8871a0efb3588a3594a21d905d48c3c84cd5c6546da4ec4116980a12779a. 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/ESA012395975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671e5c0f7b2be41eec2978d784fbd22aa882e1fc0dbe4b76395b57ab8b74a061. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZZ972352058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0097284e54183c8c201f423854707a0ba71ad4835f47577b1a120fd2199710b6. 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/QZZ972352059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe758c2b5c917205daa75508eb4caffcc1e715800e24aace2bc6b2378d82c8a05. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZZ972352060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bbbce75faf39aa6ee42f17227799cab42785bdc96b4ce8b628765df3e5046e. 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/QZZ972352062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7d8502e5488add7faec9466d87a71b4baf2d4a09392fa02acf5dfcd397b075. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZZ972352063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ba6c96c3fe92f71300a7fef3dac2f5e4e088e5856bf3b945784c7a31de8645. 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/QZZ972352064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a50252287c52934270b2c5499658e6313068cc14d08f33cc284edb60d1264a9. 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/QZZ972352065.
中国的月亮―中国歌坛名家赏月歌会
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9051f0c1709e15e2db972420860da3a909106dbea49e21302ff0ac2522e9ac6. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZZ972351801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c71d30531783c07c0d34e387d186f466a31f993d5cf4aa5b51c923df53a8f76. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ESA012387542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93af4f6968b576f9cf2f71e1b211f265d37a690f83db0f7da143152b1b745e8c. 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/ESA012370101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7f72a5f3c67367ea3a0820cc574fcfe487598ca344664ba03da8baf2a59e93. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ESA012369977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3a3571e3bd695721dab06290c94f00bd29c5a38eacecf537712aecc2e05c78. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ESA012360989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c102e56c9c26620372725f450156d6217405e3590302021909196c89ef2609. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ESA012360992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ed4f3010f97d60d65769c77d6316ede1cf627c92756cf0c11db99180c20985. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ESA012360860.