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 0x3bad9fb21f17db7d15436b927784c197348b65f3517737f325264b528af0ec98. 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/97e61932-2161-41af-8605-f8129a372f77.json and https://artists.proofprofile.net/proofs/artist/97e61932-2161-41af-8605-f8129a372f77.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 0x47d00a48ee0257ccadf87cd18b282b132925819209d5adec658f6a24ae8cd09f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZDA42407550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d00a48ee0257ccadf87cd18b282b132925819209d5adec658f6a24ae8cd09f. 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/QZDA42407550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c2944df67d7af098a73de0b0b457cadd7dfe90b5108e3a980e391462164707. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN42229511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99f2265b1568d892235e6b44f363add4c983582d3984fb9da7908265fee00e9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TLREW2234393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf14dd49af1ee1386e80a6616419c77d7c66deeb46f1f714b714f286790f1d15. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZFZ72403259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf14dd49af1ee1386e80a6616419c77d7c66deeb46f1f714b714f286790f1d15. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZFZ72403259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4862bcf7f6a34dd58361677909f4ff36ac1e019a25894dabd748c591f1914d4. 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/QZFZ72405759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729b94b917b44976b8afcacc7bc372f6f24bb9c43cece8b38cdbe89b0447dc48. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZPLR2205612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7b298e54d4cfda1ee07a2fc6bb479351df0340e250c8e8d9902b03f4d12c92. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZVEM2300619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2b56747a196d3830a5ae8dad397b06f5e447aa177f836e02fad6c6e115cb4b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZHN72342548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cbdd126c3f17db9b15173225327f8d407e56dc98035e7f2722d0e0c39d37c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6M2399857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff01bdba7c855c3b81b40815482c658a6fbb83028d25161970eb395eef3a197a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAT2313864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea2ae0bf9bf861bfa7240063fcf22385cc8ee33622dd34c07a00a76b14b653b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFK2310041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb78b6fafa8ca230f421e4dbcf3e37ea1f1762178532df9b2ed6b63583b7300. 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/QZZ7S2503335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4423d3bce335609fc6dd1cbca2442e9310b1d98dea0508440f12755f5d1cf0a. 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/QZTB72347296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a516d5218931e37994a574cc361827525a88fcc7ad879a1d51ba85b9612727. 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/QZMEM2391513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fc63327ed081496ae913564c7f6e1b16b2c03ff4074dd7457131eb267001d6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZK6N2337617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1158c348054ef65f3eda2bac9335d36ae70a86bfd358740b8f8cc91aaf0896. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB62303376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1158c348054ef65f3eda2bac9335d36ae70a86bfd358740b8f8cc91aaf0896. 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/QZTB62303376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4fb5ec17053aec5429dfe136c3be8376233fd44ee9b3a040fe78c0aa62d953. 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/QZTB32314598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f63a4369493f7bcab00229691150d450182a7a3bf7688e4b8fef26e0a772a2. 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/QM42K1908754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e62553ffb205680a1c55d80bb3f1972745162ac81cfc9df7f74a835ceb719b2. 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/QZWFH2305109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013c974d9796822f19c31b6650f4d40e439a078aefb077e7a6d7fd640b783d12. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAZ2350493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda6d5c2d8f6eda593a12a04950665c6197099fed511eb118d39af61e5a05661. 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/QZNWV2584963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c1d2f6c44fdbfa49de366e727538d424bef47bd216ac79d178d453b5aa9c0c. 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/QZNWQ2596363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace38d982f07892aba3f893587aac57b167297d90f2a4ac448d55eee08140022. 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/QZNWQ2596360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573dda373f2b47b18bad127ef6f1b65f507e021cee86772468ba803e22cce3a8. 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/QZHN52566763.