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 0xb91da7484cf7d14ed68c682a2fe9a61645026383b0316aa33872677596aa5b48. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91f7b586-16dd-4e68-8c6d-14d82c0b5cf8.json and https://artists.proofprofile.net/proofs/artist/91f7b586-16dd-4e68-8c6d-14d82c0b5cf8.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 0xe73eb6dd51461d575c80eedb2e21ebec89da61af9ac39a55f6ed57ed2be7de2a. 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/TWC019100960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742a791acfc5126300d8bd19c448ca4e3d3e48c155d7f725bfc409e88768250c. 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/TWC019100990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a78af4bae2a163e362c2a2d193580cf4d54a4829c283a1bbe993cd91e1f3cbd. 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/TWC019101000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481ff600d2e1f21a2d781d5a169618b45cc725e0136747b35c90846e046d286a. 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/TWC019101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a151fde6f36ca6b0ac2d329eca672a17267abb9daea2b19e97fcd19b1efc09c. 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/TWC019101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2777c31aa23fb67b132764684477986819cfa1e1cc0302f9e9e53586ce4d9b. 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/TWC019101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b36882cbae0b514d789c86043dc6850dd13e950a00c7195b675d388bde1963. 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/TWC019101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfb95824fcf37928140d92f322c19d2fb315bd15520969bc915dc30f78b4d91. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TWC019101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebe0f75af0202cdfdaf92faacddc45e69c7117d16a57a0f1e25738507f0471b. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TWC019303931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa59bcdc5157518a513445d19ccb466cb5f6db355f35b4e39fc0dc4a33202e6c. 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/TWC019303941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4910f43a7c965aa8d9748e03e7abc442fcebfc7116cff852f420c4967c084c5d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TWC019303951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb830113bd50fad4f092a4203b4a5f1b68586c9fa7569ed31aeef65c88bfa2ef8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TWC019303961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cff83493dab259715df58980cd9585abdb7acb1d3719dc2a7b63d81bb4af0f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TWC019303971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c26e95080c1509a92f7db21472a4c73cb076b9f6bc3ca562dbe703f6fb59f3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TWC019304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d91f6ec75a6e577897e0f88a847b69a4c8b4284b11bdd695da8b0b8943ac36a. 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/TWC019304011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc479c218d3fe166fc9996090faebc793784c14c8a56203d07458e790561d323. 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/TWC019304021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82928a391a073d1c2013994930ed51939e54a3418dea35fe6a1d645c350451e. 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/TWC019304031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a108e2fc853a27a23e0c34b2ceee9827bdb7c70aa961569e534db012d687e3. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/TWC019304041.
乐典：满庭芳 青年二胡演奏家音乐会（下）