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 0x78d80c27051c3330a4ae5613648afb58b0d69123194e792aa75a6ba1a4e98fe7. 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/0ec8e1b2-2f0e-4141-a5d3-8afb552f1f7a.json and https://artists.proofprofile.net/proofs/artist/0ec8e1b2-2f0e-4141-a5d3-8afb552f1f7a.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 0x77f2b9c3b6a0debb2b4cc5e073f64cb51b978c3a244c4e7ff077220a09c5d370. 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/HKC993324624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8481adbc1e2c307ca85b6302287f3a78f508abb4f8ea92cbe97455f58e814f. 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/HKC993124564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88a6cbc7b1730b68821988353b0440774e874f6e156dd658b68adf6619f787c. 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/HKC992925313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58013ab73ddbbf12b79391fa48a1798c34ac987c811e3a3fb5563e8b7443806. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/HKD012443051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bfd000d51e06b20f51cd8fb6a40fa66086b51f8c5621bbd4da5c97d0710a12. 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/HKC992825439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd15890e4146d71b11357bc81b725b1d472d013dd480dd10f353a8c103e0471c. 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/HKG732499258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da61b6b2ba2a83c842e0b89ba4e127e5d1c2820b398dd1bd3d7b1927c054841. 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/HKC992624259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ae332bbcddf720639921ee6de5ab7887dd0b656c456d9ca1bcda656c6cc8f7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/HKG732451879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab649c78181eddccd8f7df8fd0bdca4ce323583392ad0d726eb2c8caa0e03132. 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/HKC992524487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a08ddb63cde246a47cd7327f9c9464814c8ff13f9b0c10475b0401601a992b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DGA092443222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f736c5ede949918dd66ae0f2e5ae5bfd37c1349fd0ffd8673fe75ba9332ad7e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0H2318777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097cd518ef49c04d40fcce6e21586e4307adf81ee6cc96045dfecad47218c0cd. 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/FRX282308577.
执爱不晚 (广播剧《魔尊他念念不忘》主题曲)
执爱不晚 - 广播剧《魔尊他念念不忘》主题曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f057a9f40e376b520ebb099d0eb0769c886a5548b43f69b133fc28dd7c4753. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR96X2335892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0004b5ba209970192b1757f96cee0b5d47b13a108665dc124fa23a0c4dbad1. 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/HKG732274408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf98ad77b3e613923db2f7f8cd2b20ed9b560c6521c3709651b9a85a8edc61ed. 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/HKG732275599.
桃花换长夜（《黑月光拿稳BE剧本》广播剧第一季单曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48e922e015e7015aa82b0f24e714447a860475ca429cb8693dacce500c1317a. 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/HKG732428012.
难哄 世界是凌晨三点的梦游 (广播剧《难哄》圣诞版组曲)
难哄 + 世界是凌晨三点的梦游 - 广播剧《难哄》圣诞版组曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07afe586fa930af6d6b38ddd788bc334c819674075b895f7a6ec914aa42de6f. 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/FRX452211271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf342122a057146497e2c46e9a42a2d0d773f74679edd8651848ce85f15072900. 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/HKG731784832.
百战成诗2023 - 游戏《王者荣耀》113英雄群像献礼歌
百战成诗2023 (游戏《王者荣耀》113英雄群像献礼歌)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11f52604b461fce667907c0580cc217b263c181596870f5d58597d7032244b4. 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/FR10S2382129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0286c85a7528ff6ad2ac638baf11d34b27b4e5a193426028e22b5f4d1815b3. 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/HKG731859213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5551b8ccd414112ae0535cc6ccc96a5b22d8e5c16bff0af6051cdc6a351fe99. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKG731859223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb883ae1f2d1e3e90ed4887ef35b8962d1fa53ccfca1864029c6acf06b459343. 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/HKG731859227.
百战成诗2023 - ——王者荣耀·113英雄群像献礼歌伴奏
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f8c1400293e80ffa89265d15999e53d774a724e1e8a3b5dba8b87abf2e69bc. 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/FR10S2382130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b550c08500b82fdac8b2f48c27a28034a82bd6cda7608bb82045830d02c6f39. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKG732029251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b78a31ed8dd48e7f281afe966752d2832efa63916ca3e4459e482c80c2d6663. 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/QZZ972373197.