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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c90e504859e2872fd554ada7cba28aca32d0c2ebf90c70eeb5398498c63dcf. 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/956852d9-0c28-4464-b6e1-e36c0c29a833.json and https://artists.proofprofile.net/proofs/artist/956852d9-0c28-4464-b6e1-e36c0c29a833.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7315a02cf2b830ca3b9870125e3e22d89b6f48eece5bfb1fa979ffef2c2053a1. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZHN31931832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad04dbf9d407dc9bd9abec1e9b47ed36590dda1753e1b6d7fa34b910165f47c. 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/QZHN51947032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6c6a9a00026297bbb83bb7633dfe75472e9d5fafbfeefe132593c612dfac88. 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/QZHN71961626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03036a861b6b8b8113d538fa2415e5595c941422f173668d638bde815097c82e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNB1911349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b2dccaeeea2eb619f30b39e55bfac29f839087604edc7e35bfbbab63ae1fc9. 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/QZFZ32164552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f61e56c2b0856cc7ceb63cfbd563cc54da8942199d3bf56e1d3b5194f0a2f0c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZFZ72185053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52226ddc3e5f055b979debf474306d858502979e488e77352980ec7354b2f56c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZK6H2163861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39de5d63740e1c0dbfd889810b5e871a7f78078dbde4bcd01e68f03f82fa0f5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWV2115412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf16c88f729450f7e072de9e8bb07d2cef893fa855c7d3467a42f97c3a37089f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAT2156269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6679183bacd38c3fb564ef5fa9e0a685a13161de5b853b7fa05b71f093a46738. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA52263208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f640ff84ba70dac64c4b5a4040b6c33840ed30dc3d29a76fdfe95aba784d65. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:15:35Z), 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/QZDA72264361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc934217a0639534989e856381897cc3d12e1fb4ff8357919205c5b7d61fcecc6. 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/QZHN62206432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a4e29f6ccbfa35cfddb4a8bb9d58e81994e43ca5804d6627a180e07e6e2a34. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZFYY2027343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d4c9b8fc08af773b5b1894f6bb6cb810f133c9a4b1c0046927c9631966ee9f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTAY2266650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd71b26c9ac1213eaf93ce6212f3e992baeadfefdcac2688cc773f9e5830454. 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/QZNJY2336461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7662f7989aea5dc4c4af648b0e89c29777b63e0eaef03a8894f78fd520244f52. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZWFJ2362182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7662f7989aea5dc4c4af648b0e89c29777b63e0eaef03a8894f78fd520244f52. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFJ2362182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455543bb84356130645ed8d6449accf96df1a6a83a76db73dd676eaf6ef50bc9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTB92358250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeb02f67c777a1733aca289455171481f421ec1434eeb8ff2885404d6811ec3. 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/QZWDD2488068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca58383c1eea497581c16faa3a96341761cb5efeda5ddc5a03e733e46c268e7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:56Z), 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/QZZ7W2481012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaaf0a5d85514efe1d0f284906bfbda24a4c0614840e5c2bd06e65d44c04c8c0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA62507096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5423d8cdeef49a2c61aaf89d84f9eafcfa76fb8eed02210547aa619655c57273. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA72453553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1a7ba88312b709b12310792bd29718d9574b1a6bc4b3f95d66c54a7cf6ccfa. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:06:35Z), 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/QZFYX2540252.