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 0x48c631cf7daad05535313ee54f67fb9ed14c2ac727aaaa479ec7c3f4bd89b446. 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/e9271c4b-9d3b-4829-8ba8-3cf95a72fdc3.json and https://artists.proofprofile.net/proofs/artist/e9271c4b-9d3b-4829-8ba8-3cf95a72fdc3.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 0xcf15db6932895a23ab1a456a30df6f0e7bbb7ff2239e088a4e650b6d5e8c5cfa. 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/HKC992425731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efca7043716a4222e53dcd6728815bbd71dcecbc6a9c13fc86605ccd1b81527. 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/HKC992425639.
旧梦故人（《孔雀圣使请动心》网剧片尾曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fd372c5147445b0f0e3e39d61f4e5b64160b5763058ac82aa49972245c4e69. 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/CNZ632201249.
你是我義無反顧的執著 (電影《我要和你在一起》推廣曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eb4f5dc3610c8f1b707f056809b5757b595e5c685dce517c3f7cb49c6066e4. 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/TWU712204641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51deb2f2cf882f496019c3a779fb2ac7fb8a86ef3d7f32e2e879033417dbe0a0. 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/HKG732256040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0142f3f0be93ae0c3c45aaeb3c5213ddae38b339360f8122c339c313256cff0f. 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/HKG731736519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7a3e50c28df0a49f2da7e31673c779ab5ad2cf13af4b7b0a4bcdca04514a33. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKG731794726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e9aa088d95308128d57712594983b8535daa0ac19e549d8641ee27faacdaf0. 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/TWDL72200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef50976dedcf043a1dc961bcb8f92cb400780573b79c22ce1145381ed29fa2de. 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/HKG732148154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f966a344a4735094846b287c3578dfe6f3ac5584c6e02467bb04876cde14a25. 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/TWDL72203194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8793f03c9b7535a31ca008afd175fff8560695a883e5abc2ccc018dd61e35ae8. 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/TWDL72200285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e461ad4c77e4cbbb1a5726ebb4337ebe5c656586b945536fd177e017f052fb3. 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/HKG732157170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a87870268f64b0f3d7981de2bf1ff676ead010720fef5176201ccd7a140d45. 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/TWDL72203136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530bf3778d05f2699c979218edfd3e58893946c46029a64cbb48e0909bc14b39. 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/TWDL72107681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ac79d332c787788fbef04d54261614ebcc2403f5ebafb40f7e148db2a6da69. 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/HKG732235681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe228addab1bdf334caae44333f3e684e2effb7c7571362cc4e945575a26669d0. 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/HKG732117973.