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 0x23fea9163cc6b17679401ce7919824b81de5cd76ebaffbd8553065f7a4771fbd. 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/abc7342a-416f-4321-9786-5dd5f77dfc86.json and https://artists.proofprofile.net/proofs/artist/abc7342a-416f-4321-9786-5dd5f77dfc86.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 0xb4ad7bbc0997e75d99c2ed79d16859b3b0aced20c5577acc9c08f0457b35ef57. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH3131800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66a4352050b3f7993979e3e9be05e0ef1f980e67f32e4740d7abe67eedb3f95. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEBY71800623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8776bfdcf6eabc531f222e277848b8bb61f97b15c38ff0d9a7a905974ee801. 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/USLZJ1831243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086be2d205c506a479ca80d3fcd7d25c8968018e95984ecd30a27bbbd6ff8302. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CH3131900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086be2d205c506a479ca80d3fcd7d25c8968018e95984ecd30a27bbbd6ff8302. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CH3131900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eb6c387962e46e26361a48eac438011342ce09897cba49f9043568863124b4. 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/BR3752000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e11e8773f984b5a88917f5bd2811736a4ddae4f86cb44106e067789060fe6b. 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/BXHBP1900515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b757440dbd557fe2421dd686bf76a3d25d11879bcbdc20b8a34b1bfea8de449. 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/BXHBP1900516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05182a107eaa5c3e8a5c415bb5f8d09b5ce805215808d90181d48197d0c5881. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZHZ52014676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c22a4c2580e0e7629409e87155b84221e00564abd79d19db55d6d11e0f98d5. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/BXHBP1900855.
Live at Jamsil Sports Stadium, Seoul, South Korea (July 3th, 2022) [live in Seoul, South Korea]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c14268b6f6cffab20d1c8fb5c25f0b17d96df273ca7108c113d51c27b6d36c. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZDA82351242.
Live in Seoul, South Korea (July 3, 2022) [live in Seoul, South Korea]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d99b7b51ab64ff12d0797dd860e5088a38c52c4138569cef5781dec34ffe20. 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/QZNWW2411340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d622024186707bfbf50264cb944b183634720793abcc1f18c8aa264a0aa7758. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZZ8A2402500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42476f96a666605a9d6759ace2b1488327a2b1e518d1934042c6c4c7ed940c1c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6H2527339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7507892be8208504040e0e590030fcbbabfed1367480e9f1438abb9c2f8f8010. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZK6F2536988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc2f95d97c701782d5fdadd56ae80711aa79a79ad43aee8e12dbbc358c0aa91. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZK6F2536990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55917972b8dae365c0f9ba153d2d8ab35e8b3a88fcf114b9e9e6e293cb15ae59. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6F2536992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a67335d0bcc91ffe79ae693cbdd4058bf338e191f75b19c2cae85d4b3b4b70. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXHBP1900283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284952974967153c64b13c11585dc581876f3ad5351ae6a985d22a90e2ef5a05. 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/BCE5L2100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5604eb90f97f38efb06e6871fb2afb8dc9e485428a563c0267ef5245f6f8331. 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/BXHBP1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c375822e95c7cd5d1f7a1ab5c1e66cc07ab65812f19390243acc5ee0ad65421. 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/BXAT61800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734c6223cb728849a838dd08cf945d4bc7b23b16fa73561bbb871defd58a0a2a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US83Z2025810.