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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 0xefadbeaa57b13eadb66a564c96ea6379c0922c0895fe69f999b1da0294ed53dc. 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/d3a0b278-e588-4915-805b-1902e6b92799.json and https://artists.proofprofile.net/proofs/artist/d3a0b278-e588-4915-805b-1902e6b92799.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 0x1f871b6c98e25545f154a88e1ab43a09c4b9ea999d243d53713d7a45429c2ca5. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/UK9JS1701102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541fd55b44896b9835bdcf99def613739691884d10780909a8adcb362dee7591. 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/UK9JS1701103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20c799caaef76cacc504ca80cf7c447185eb43d3ead85088beebf21c15e3401. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/UK9JS1801702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522180d6d260dcac1021c5272ab798122caccdce844019d14758a3921111dac1. 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/UK9JS1801903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e09633d9f27cd6e59fbc9c5b3d7665fb5afb8948bc3b1de471c334a6220e98. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/UK9JS1801905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038e144aa7176d3ca113895f5621c0b530c06868ce53194de385f9b9e7778e23. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/UK9JS1801908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371592154126eff91ff60c054a493997cf662059bf5c746559d3f63164e05975. 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/UK9JS1801909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c7ebee4929de4e8946b7c08ee4c588671855e945fdfdb88292996cc242300d. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/UK9JS1801912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a6eaa96072d44bdea6d23cd5a53556b3f2629094f8285e9f9c87ba901cf546. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/UK9JS1801913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb89331d13f186b8774666a0ff1faabdfaa06533129aa928a858f8b2d8269f1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/UK9JS1801914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb9049e6857d1adcaf2b4561db838fcb92e48fb1a9fccd6169a26a3b0da88f8. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/UK9JS1801915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2169e8ce29522c26fca7368041a94f8d79d969dfc0b4020f2a6845a2ba048315. 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/UK9JS1801916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fad984bb4707ab7ef8aced6065edce31f24d55926ccbf24a922e96ae44a998. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLGZ2000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5bf8f3ff040f88b9591196045441348980884c52274f42f2d0a96f36685d7e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:23Z), 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/USLGZ2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fec00daf568406b23181e0663fd32babd5ca1a9c508fce6bfd39c44d116c7bf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USLGZ2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93050c76abace9de0fe608aad04da4ed28c1a2b265b368cfda16127298739e92. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USLGZ2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7b0ce937da42750b89e75506ef35378823b7a1e1f435ec937e90e7b705c377. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:51:44Z), 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/USLGZ2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872c27cbc97fca5050371ab3ac0c414fd8558c501b75386d698f49ee264af90d. 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/USLGZ2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf87990975889e5bf935c8559f4daf7993ddd1804a096f080f7c9220d0521f4. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:32:21Z), 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/USLGZ2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bac05eda52fab1aadfb3098d5399b39047830e67003669056384288d97053b9. 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/USLGZ2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892d2e276673da69b70d92983c1f4dca9431a77487d6e4a4a5f126a465a9e369. 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/USLGZ2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4fb40320944955ef72d8d7ed26de7583ec286f0fa21c2a58d43c970626921f. 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/USLGZ2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abf780e2155673383b12a246856fd9c6f59776824a2e2f9c7a1cfe5c3b0dc04. 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/USLGZ2000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89edc47cbb24850ce03110d8945066da6206b5e32ebfc5f59dfccb5774e9a739. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USLGZ2000049.