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 0xb82f88f5e7a57f1e76f85d5b99478e17e185e5a412cb634cf34f2c51a651529f. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bad874cd-0901-4a47-b986-604f9212d0d2.json and https://artists.proofprofile.net/proofs/artist/bad874cd-0901-4a47-b986-604f9212d0d2.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 0x2734210f553913a9735c51122085a799ce3309f49258acd9bba956b1c0d27c8a. 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/DGA052408271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a66526ed41a4b48b2ae89e9a82272c2949dbfc9919b4974b35fbec8afeab20f. 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/DGA052408273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab239cac7f25bc8ef4f91673839124187f15aaf1784e2a226040d4816b0c1e12. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKC371620913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1e90bea91980119bbaec9ea2dd7634a0c8cd71f821cf85af3f789cc2ce2b23. 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/HKD012301092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4245edeac86ba294ed476aa4606a72a1a935495464384d3f29a6f51cd82b834. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DGA062006737.
风花雪月颂 (和平精英《风花雪月》主题曲时装专辑)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3c4651cdb5f30c1d780ff88c4396a4e56ca04e553ce5510461bd93dd51d767. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/HKG732290552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c743399b6ff3c14a72454f0aeea3f68eff3e9210000c62693f3af5ec05e41c6. 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/HKG732290553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e14408a2ac2d8a1008e07f2252d0505e896fc85a75ec261290e9047de70b807. 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/HKG732290551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe809b7e7eef5689b9ac33dd813d3cd0af3884264f3be96ce456b5aec33f4eb45. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/HKG732290550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5c428787468ce50de7a60ead45f27b96ebc8a0a8414352163746e4d032af32. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FRX452365202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd91954a35790bd938a4e90b8bc9ae53499552d6d43dfa73fde0986663414bf0. 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/HKG731619423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ae2c785d25b2ac66039dd3e758c5edd38c14aef0e2118e9140dd44685c91a6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG731624842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42f6d8d29867950263badd5b71f08941d959a71f1c1a58127fad16085745473. 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/CNZ171600638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586587800d36835dba1b32a0f951322ff9b77e2981d36d24704de78accc2eea2. 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/CNA651302304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe9a74fed6ef41bbdb0c9de684ebaaf463bd364f9b368628ee9eaad8bfbae12. 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/CNZ501700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e79c95a84bae313b5f7baa3ca2454d0d9b734000a316feb36276fd495014147. 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/CNZ501801084.