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 0xb7b41707daf4c20a4e06a1bab74b5a0a76a86dd50466c954ef3366ddf9851156. 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/df9493cc-e610-4099-8f4c-79e0b57bed68.json and https://artists.proofprofile.net/proofs/artist/df9493cc-e610-4099-8f4c-79e0b57bed68.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 0xa3e6011df6b698397ed6ba58f4426d84703c83bc586030220859bb1ed49608c1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNW72383250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c209870d21f0309f5601d63c761fb165f7280657f6d62c726a5ec5d6beb5c3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DGA082346373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba57fc38bb49a8422aadec135adbd27830b31ef974b81582cec49d0ce948ad21. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0M2367741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38b70edb4408d87bc3ece5fc309d5634c6e28082baf6862a1d2fe1c93dfd0cf. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/QMDSE2300491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5f06fad2421ae1fc13ee43521245409a34b06dfbb628e8f17eb35879c321d3. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DGA0R2316752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0904e4605d14cb6ce370603984d96dc265b9dedd2964b80de9eff47f1112779. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZYFZ2403094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbc8ba71ae16d216324aaa839d473f2ce2de62f04c4d761138f9ce1a9a3fd45. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZYFZ2422670.
Jodi Mon Vangar Bichar Korto Kono Barrister
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbca1412f9ddff2f71f84ea0410be64f44640e6a29ac667c74ddfc36dd279de. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0R2465986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f7599c02dadc8642420d2d9840bad8ce47ade2a6352215473113662a4bcc11. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZN882415603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff28592ab8f3d76e2becb2c4cac832eb8d8f46136aa3fc2aa12bb0aff07b3d6d. 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/DGA0S2430135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecaefd4f5226dae56d0a233421f6671b5cf7e0f83c728a62acc31ee5c289c44. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZN882549050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d101ba8b6d8c572951f65c2d732d553738654aad2b71011e9a568adb87db8e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX282511926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b46a16e1fd8dba83614d4b1b4302d897e2624e9dfbc8a4839ee242526992af9. 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/FRX452598233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3fc1f26853ad92a0c30793af94c42e440b297f170ca2afa6cb6cbf9750c8f3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZWU2500207.