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 0xa42d68ba7ccad1e9fa7c82dd90bceb8b14862d1f2b312f7c06a6ffae1db3566f. 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/772da445-af9a-4e56-b657-e83c752d6bd9.json and https://artists.proofprofile.net/proofs/artist/772da445-af9a-4e56-b657-e83c752d6bd9.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 0x138ce7e08190b2b7d641f4d5c3ca3446753322b01e701492585a4d1bba3fcb61. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUV401201531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e53fc1c4f547a9ffcb75338e9b2be19d80b35db93b5063363b88200d4fcc091. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TWU711400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc1a55e78dc18901bc29ee16e11087d97ff487a9a1ca4b926a9bfb2be6fe693. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TWU711400352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7bd0fd085a7ad09f045bfe80a7b62e19f92475374ad02fa99bef2202cca7e3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TWU711400358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1a99df987326f028eac373941e8c0135b2783151227d611ade6262b5e0a6b5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZZ972333527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5759239915dfe0be829ed3aa3ff9fd92cc72eb79c8931adf57c587471bac675b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HKE022232269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e81ee64100319b947e3a28a5c85baa91400a9856a68587cf56a5184e83eb652. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/HKE022232281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b7780f7e6ae73203d5fc23f1b53903219d344815a782604bf6bb635f70b309. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/HKE022232284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f28cb138f22aed0d86e6165f1d026d1575197b64deb421eb062dbb34008e7e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HKE022232568.
骄傲的少年 (《那年那兔那些事儿 第二季》动画片尾曲)
忍者神龟2-破影而出 (电影中国主题曲原声带)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91278d37c871dcfc318798733e1f36adbc286362d9b0d7a3a365d0af86790d8f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HKE022232316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e99503f3c750552b0740c1070226a90229d63f53ea67b38e7f00f0a1bd38835. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HKE022232614.
就趁现在 (电视剧《青春创业手册》片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491cecc1167c8cd2633ad4b6dab1fed86b0fb00324556b78c03d310496f2c04d. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/FR59R2230707.
《英雄所向》（网剧《说英雄谁是英雄》片头曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354dfc6d29ed0906f8b3358926f20bbb15551dae858f05e07e071ffdbce056ea. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/HKC371650349.
把一切交给海浪 (《明日之后》深海巨浪资料片主题曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb013c05ff791e186e91ed78d01d6ce4075fad613adaeddb8a89962b8d699c03. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE57V2312601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38d24251f7338dba3f8be9908d165bf99e8c5f7b5d31eb7e930c7eb0bad8bce. 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/HKG732281730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22181def4290be3e4f35c73feb75ef1d0ca660f90d870da31c4381bd5544e8b. 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/CNZ691800257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c163ae7cc9e1f2b22d9fe94004d78037cab4490cf05692d2b009aac3c91c9b. 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/CNZ691800255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281c5d58c86d96b5e1f4b11720c0d717a79732da7725ba00b22bc0d2928ed0f3. 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/HKG732281800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dee58fbcb8a87c726b39b4ece71bbe2827cbb5109378647f62ff40c5234863c. 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/CNZ502200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ada6f330e32bf9e8ab10ab1388c8b5f9ea2244481c24bc91806163a9144738. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKC371653062.