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 0xbb4319b30be5bc48f5aa6e8271521c3f9fbac93f437d7f3730bcc7db65f299fe. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/131d4ada-80ca-445d-bc28-13d007431fb2.json and https://artists.proofprofile.net/proofs/artist/131d4ada-80ca-445d-bc28-13d007431fb2.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 0xbb87bc9e312577a57145e6d8fabfbc40c31e29841850516383de16b74a717f48. 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/CNZ282000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65705dd4ad71cdb8f988e1dd63056727bbe6fb2c89e292bd4250516d67f117f1. 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/CNZ282000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cb7ebf47e6c3e3a857f882a07a7da1d8b4055a79a806e878117db390ddaf06. 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/CNZ282000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f4d7cda4c0aac370751ad4c5d21b0eee7376b250c8ffec8a6c6f976a457e9e. 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/CNZ282000027.
可堪解语——满瑞兴制琴技艺70周年音乐会 (Chinese Lute Knows It All)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b32cac4cd54ae3fa4804a1b3d9ea728e75706d84ecd0177071be26f3b1a7cdd. 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/FRX282169386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e20c280e036aa18f094d42e7ce884604b1735274c683c207990f0a39531bd5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX282169389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630557dc22f5dbd056f69e2d4359423a660f695d31975566b759cbdf04ddbdc1. 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/FRX282169390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55d7536f605b347ba6b3541af0e9f73c1e5cdd8a5408405e504a8ae063b31de. 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/FRX282169392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb1b16c16eb12012fcc217690fc34aa5aff655e82ee8385f46a471abfa0120e. 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/HKG732223964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd833527c781da6da71be88a8f84f40d3ff90b109b4b0e8db899f5cb5de302617. 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/HKG732225012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47344f611201627560bfe9ac7a5e886b131dd5147f7c44f5bcca9f304253e31. 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/HKG732225007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dcba54f27099592f5320b5b5e6ecf6660f0b4c1ce4a0fd377d0bce1aea5f17. 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/CNZ282000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64366d309c61cbfbb8174bdba4b81b6f319a78d9ddbfb184cd90d68e07730b8e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CNZ282000057.