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 0x00c4d3c91b9191bccb8a182be1497fd75134af77c1d942c9d00045dd85e35609. 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/e7d63e4d-38b1-4ad3-8f60-08e988119915.json and https://artists.proofprofile.net/proofs/artist/e7d63e4d-38b1-4ad3-8f60-08e988119915.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 0x37702f559588d35f7f95d0dfe13045a05bf50dc362cb9f1635a39246cb3cf42d. 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/USHM21254153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3542a7ffeb46acfd3ebfbced209c2ca173e41ceb6830f5cb6241822ad3b6652. 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/USHM21254154.
The Mighty Return of the Dirty Sandwiches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6e39d72583035530da00937ae94403ec93cc1e7458a7c56f36de724919a43b. 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/USHM21254156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9018cd4232d4944e5b13a14df9d631bc88895ee561f56f479c7c37f8060552. 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/USHM21254157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450584c557a6c7d8c3d50a77cddaf4d75f3aba0e7e13c4b779e148639dc36f2d. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/USHM21254159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a3464c641461e40006407aa281acac10e526eafe05ef5e383e0e689cf20c3b. 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/QMFMG1367970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b709985c1ebc52c48be40449f9c8f40aa30849a5aa011839b3091ed144b85c5. 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/QZDA82005542.
The Mighty Return Of The Dirty Sandwiches (Live Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f44abf7bae9906242c6d7792881e29e06c21a41070994002228a514cf67ddc6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZNWQ2255047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1bd5d320abb6bfb27f0556889242e4d67f3681fe25858e1db5dce5cf0bf98a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWV2379924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e2518d2a58a8c352dcf476339e9d0837b822d80f2a6d70c74e773d27cf443c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZTB22368314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbc922f6863f80ec03437616041f0551a1f5e71998f2e64617673adba072f1a. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZWFR2376904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75cbe5677291623d18164fa866ed99db38752b885394438d70ea0ea7cbf9ef6. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZWFR2376907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9347c6cb815d38af145529fe8293c7a6e53311f92e1acaffbb7e44cab6aa090c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:00Z), 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/QZDA42591084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de92da6ffc95eaa5e61443dcd8ad693c245545a3be4be93fbc282ce18756ffe. 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/QZHNC2580471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28319ac523fb4af40541a3c4a19340628d1b114c1e072fa9a0e773b8e6fcd0b8. 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/QZHN52519507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e93a5fee72e60418c7a4b83957bb37dcd847d3990f62068c3cdded230d012f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:46:38Z), 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/QZRP42594850.