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 0x6815fe674d8c8ad5131a334a6e4852cdf8ac7823b635c2f72ef527db36d90c8b. 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/abe1c617-c97c-49e4-a7d9-f1d3995a09d0.json and https://artists.proofprofile.net/proofs/artist/abe1c617-c97c-49e4-a7d9-f1d3995a09d0.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 0xbd4195cba960e04d878bc881ff9d08b5cf9d44f1baf344c36f03e63d03dc4c25. 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/DGA082446289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2a2f3e49be319e789c65dbb9cc65bd709060741670ba007fc95a7e859779a2. 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/DGA082484176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaf17ab00d523a723cac7dcfcd34c970d884729e7123a4a2900ed669d98b1ec. 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/DGA082474395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74e523be54928991a43346d7e3077f2fb0517cb3d6174a1a372cc5d0fc1cbd6. 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/FRX872469079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f0806490b25681ed1980b8188b44922386eb8ff368d0237fc2815455199ea0. 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/FRX282418855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55dd049051ed936d56b78b7fa7df5bedeca9e21d1cd9d7996a4a9d6874c2f37. 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/FRX872438539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f7beb1c3e29b9398d606b182a24f112805f73da411c63be799c2b80505a384. 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/FRX452425426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27d36685c3d6dd755cf2229127f9f87278c19a4e98ce7a437313c983a642c40. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FRX452425388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5388709d6930952c28d18d3e78a35bb7b1c6c01996f7118ab8b3954d66c519fc. 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/FR96X2419238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cbe049d6e72ae95dff694b56026eeff637b30ae1ac8885f6f790ed354f34fe. 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/FR96X2431425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec0e2c3f00ef344945d90c27c64a50c804fe2aee9c6d95fef455247416085ab. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:08:34Z), 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/FR96X2421827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a107dc23a6f4b21164088e245a4790d601ce0dd80c10aecb26f1088f5e31ff. 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/FR96X2432093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5132126d09bb97d7f48404f6591ac51a1c3c56adea9d77677160fb27d133d0e6. 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/FR10S2404955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a874905e9518b64f13049d335523e0c09ac1a74a31bb90eb6a8067c1a88a9d5. 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/DGA0Q2347921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ace1a5564c55b57281260bb91c99ea3c2266544cf22e263d72cceb5508cdf8. 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/FRX282221661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dbd78838d2dca95a1cb68b073ad9631857c66e4fdeaf16c394e97d613b92ed. 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/FR59R2341918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9190ceab1f443114ada52a97661be24745d378b2076fbf94dd05c4670befcdf. 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/DGA0L2418768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f24b4ba0b2f58a74cb98d33c36c55d895c66a0313f89e8b9f6c1427eacd1338. 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/DGA0L2420823.
山楂树之恋（你的喜好你的习惯 你爱吃的我都记着）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261d57c1b00db8ae62bfb6c4b0203ba6a0319dc99241b69cbe067fdb970e06ce. 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/FRX202534499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f288cacab09494dd709d3d5e8059a846f4aa10e273a48093fafac02b0f9ee. 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/FR96X2503077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8650d5f5b1a1d64d74f084e8fa4e3d589db5d33e8d90ace3a70edd8aacd3c7e. 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/FR2X42540577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bace95d2336b401d697b095875a30999c56ac8069ef54b17037c0ebc5204baa. 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/FR10S2582697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e7529081facb2bea2f24996eddd4e486ceb7a130b907517ef53a1d56c161b1. 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/FR10S2578524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9222b1d4d617ace11abe93dfb915f4fd14251fe1d9a8db657e3bcbe2b8c08056. 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/DGA0R2454352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ddc031e096beda454f48471e08ac8f326da29382b51598e8eb438a08e13fa5. 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/DGA0R2477956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f79781e1f9b9d625a572df878672d01ed46e6dc06e618bf817b6b5ffc672c4. 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/DGA0R2461213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6c9a205031c5dea3765eec81c12026a18d35c18eac2d1ebbf014c9b430efc7. 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/QNSM12400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dd6a15bbfe6c2556ac768705e988f4afa605974d26fec457b9a4c966c92a3b. 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/DGA0H2494111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a249f5e8cec83a39fda07fe3a223bcc3a89da714e05d671f1a9793645dcf23. 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/DGA0L2420868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4404f078cf3dee72f6a88504fe7bf452214d0c44b256cd445da3dac0c49110b. 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/DGA0H2496482.