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 0x2fcd6e81cdda04df40c4f0d220a6fc2d085c4d486b95966f6715b13dbdbcfccc. 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/32ea73ff-c4ce-4b19-85a8-4a7a71b01445.json and https://artists.proofprofile.net/proofs/artist/32ea73ff-c4ce-4b19-85a8-4a7a71b01445.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 0x5395bd6eda44c7dfaa45e5d511f6ed12a33a99ca082cebbd8cfd307e7fab717d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWCT52433102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d55bff32c1b1cb40ff6c43fe175acd63192fcd17ae0b4927c19132419b53bb0. 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/TWCT52433104.
風再起（電視劇《要久久愛》插曲） - 合唱版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d1c760d6478f1b0199db7d4c1adcbe3ca61f0c95ed626f48d84f66a8c87c00. 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/TWCT52433107.
風再起（電視劇《要久久愛》插曲） - 獨唱版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa38b9767eea28902bd0e30a99ddf020954d161d749710b8a780d1d79f18d28. 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/TWCT52433106.
從此害怕雨天（電視劇《要久久愛》插曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57efc88417d1d4121b378b8b1a88a36879d5d90e0613bf9a25a0573b36fe081d. 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/TWCT52433116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a36760a85baf542562c05b7e2e34cd2fe2d58d141f04ba30ba505290aed92. 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/TWCT51718552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d14002cafc610fba861685d88ae2b5a25cb131ea0a7555df0bf0d7d8227395. 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/HKG731606567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4e8916ac8a72890250f690a1fb92a0425b446506bc9accf8deb27fc0d4e8c1. 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/HKG731606568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab68d1655ddb3369e941e78832ea31dc47e94cab7576b79ac586ef707a2b2c4. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CNZ311600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc7595d75ad438bb199f61c906c066986980c71e906f8186b1c3073b001dc99. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CNZ311600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5fc527ee2ce7560fddd232a11e6277fd9f1e4090dca8f4c1bf4e556d0626bf. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CNZ311600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410f6f636b0eb68b8ecddae54578f079a441fef194a2b5189de4460a33d1a7c8. 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/CNZ311600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157c72191edab3ecef2e941ff4c283650d9f527c5a6daab92758d9114113ab06. 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/CNZ311600091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65b5976aef6d3691926b1a28601eddbf1ab7c7b4ba07348a54a8a44ccfc6bc7. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CNZ311600092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5a14e340c97f8adaacd98f02d36a87c03e528cf28492bd885b74fa2120f8d9. 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/CNZ311600099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471f4254a4022045d93bf8b5697a7e3d4ebe8132d6c2981b40513af2d3162cc8. 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/FRX452468160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5395bd6eda44c7dfaa45e5d511f6ed12a33a99ca082cebbd8cfd307e7fab717d. 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/TWCT52433102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168622dee2f6189f62a59a31c96017447c3fb3efed2cf08fde34a5bcf35c6333. 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/QZZ972339505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3291bbf65e81c93719677ed35d0ee107d04c16e8511abbf6706da59c80bbf9a3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKG732416439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98ebc6df7ce6ba40bd6038a34f660c784c536122162e853e02bb09103d522cd. 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/DGA0M2490555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b1fe7dc3ba0beb08d52ee5f5c4a799595defdb11defa3bdd274e73623a088d. 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/DGA0M2490556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ceec6e4a68643d4c7670bb4d969467329e2e394c503fbf7f5f04d2a3eeda77. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0M2490557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15677238b28297c3cee3527a7ad8ead84e80aae3a60e0ef6a63da54cdafa1abe. 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/DGA0M2490558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c807440f8aaccf1f00a79dd6ef34d8063164b6ca07c2788c9f0b2d96ddbd5fa. 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/DGA0M2490559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc16cececb64e765d8905e6d9ff9bc2c7dcd4740ac173e719fce9ef14fe2d877. 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/DGA0M2490560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e66e3b338e4712500cc0bc81822512dc86ecfa35494c41940ac87534ccf83a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0M2490561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e906424003bc27dd3558d4ee0877736277179d81672f611238836f83f0e0959. 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/DGA0M2490562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b12fadea49464d1b487970e1f1284badfce23bc0f6d869e04afc5796e21fae6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DGA0M2490563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0598e1226dfa6cd290a2044b415d38a4119e694ddb3094d7359b9588c0e568. 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/DGA0M2490564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7780d33eb5eb2b6fa0e12f638087e09b0e7ce7c8984ce7c52ebeef0d2415edfc. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DGA0M2490565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b7a4b7b7d6483bd417c717c86327de50ae488598cdd50c5e6a1c676e2890b7. 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/DGA0M2490566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd21cb0159aa54fe8ee8840a211beda30d0d80e570e63c0bc1368edcf392fad4. 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/DGA0M2490567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be4483d1873f37f6ad49a1e5e610695289dbac3b5b963c1f78b173eb4b6d90f. 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/DGA0M2490568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ebf119fa80c02abc7f008ef60430daafd19396625077965b7024814955ae49. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DGA0M2490569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13314c0c3ab1f2c8ff9b178f9351b48d3226edc5768032e66a473482ea8f9990. 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/DGA0M2490570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37afd996a4042f89517b977146c82b434282eec776c6e075faf2376c9e06a664. 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/TWK451000002.