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 0xe00b0b9f7fcaa74d3294baf07efad59284e46d3115b6456195185876f5dbafad. 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/9a92d244-837a-4d0e-b501-533fec2cf120.json and https://artists.proofprofile.net/proofs/artist/9a92d244-837a-4d0e-b501-533fec2cf120.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 0xea93daa773c73e0e1f52bf8f1e513a70e4a41e74bcba7a8ba8da33d475b79caa. 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/QZNWT2177340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fea031cfff1cc3fedd54bb2cecfd04c57eb53011877de94a950fafed8b7af77. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZTAS2101062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b475651f097e797c2867fcd415571f50937b16266f4a04de518d2cf1e17224d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZFZ22281922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da365f3d31106d917d91e6d906f4f592f545b1ceb006e0aac4da5a25e88b9b9. 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/QZHN82294602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94576894ab82c267246aaa1444c0055d323a45fd82c53d2c40a83dacf3535860. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZTB22276101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1388233cb2d54e7dcb09ad87852e6f9c64f9e38f5a6da435de2dd4c8058678cb. 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/QZTB92256012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9b879eb01c6df102a03dfcdba1a1c0797e28e1c936bc8212999a40d9b68346. 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/QZS632267428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9387f8054b0bbba1885eb4fb101429a2fa6a535b93b04eaf4181cacae63696. 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/QZFZ72385374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672e978366e3a2ecaf7caf79b3cf2dff9aabbdfc066291ec5a28ca48d86070aa. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZHN82363305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b27b9863f7329a733a717c01e4e74dc116d9cdb49dc6efe152ffd849dae81e8. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZK6N2343744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170793dfddf951846061129d14212001ac3134d3f4cfb57ed67b4c39c3a691c0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUMEV2390120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48937d689875676475b789a59a6acf6319995cd0022ad7794e0a2cba7d8f1e20. 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/AUGBT2308925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41614e9abf009dd0bc6ee7af2f49fa1157045aa11dc88fe6a5e8e1d8201ec1bc. 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/QZTB42388521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd748de65b1b6b0d7d0e425db1579cad59e3048fa55edc8391fa6fb1daf937812. 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/QZWFE2316005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58444d37f422d23ecb453bf38a9555d4d481861c97e5a34b6e528990a776c07a. 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/AUMEV2404482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b278116bc9311cfeb96576ba71b8c9168d95dd01aab1cbc268c70af31ffa9d. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/AUMEV2424096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107304b86d2ca730c5ce176014f1876808e385c16ad92bfb941175b18a3c3595. 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/AUMEV2481114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ca936a11f1dad0d926199898a8d442227a97e3ba251ba1279a88cb3ab1462. 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/AUMEV2496274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ace91ae06692f6e169765d8d828b86e16295589b4a20b73e573b7beb02017. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKZGC2503623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ace91ae06692f6e169765d8d828b86e16295589b4a20b73e573b7beb02017. 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/UKZGC2503623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2ddab0ee9c72ab928425c224e2b9e8d96a193f580b9f91f3571bd027600799. 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/UKZGC2502738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2687e0a5b9c669e9edb80976c66f99867d0348d516e52e991f17b993e199b1e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKZGC2505321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe94dde6c586aea9a3610a5a1d8a84f90590e44af9743f5ca068a6b689e23c92. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/UKZGC2506070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc960f0e0b2bb9c2e1bf4d176cf431e4bda8381b593a0edb6851048b40d8dc36. 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/QZTB92337504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e5ff64cdfe865a7edefd7c7c3c1bd0b51f3015f833a7340a1fb68be2bbfc8a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/AUGBT2360650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cce5993e03974ffe45ca674038009f4582f1b9f72d0d6ffdbe5c4c19ca531e1. 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/AUMEV2512943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba71ccb6b384efbc66d56d2d3c184e7fdccff37bc9a231ef482e47b0b2b93e0e. 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/SE6QE2464115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba71ccb6b384efbc66d56d2d3c184e7fdccff37bc9a231ef482e47b0b2b93e0e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SE6QE2464115.