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 0x3749b0e9db5b0241c393bb8c7e075ff5e9839345c7cc5c6f8376ab1115b644a4. 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/349a2f39-d33e-40b5-9732-782caa3a2072.json and https://artists.proofprofile.net/proofs/artist/349a2f39-d33e-40b5-9732-782caa3a2072.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 0x424e5a92ba91b21088db7e83c41e148790ec04fe9bb5d2e85ee5aed4c52d0297. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ESA012050677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aacfcbf86bc048e4c2327bf375e8e5244f4ab00b62478cebf49ef834b141a68. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ESA011855826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e5fb66cc7fb6b20f95c43658adcacadff4f771e726296649f1f35a4bae323f. 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/ESA011855834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8298dab0961af20f1b496dcbcb9bc7251f213f8dd04baf368000776b27ae45. 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/GX3Q92073256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0394ddef5ba772e84c3c9f40d31aed2e4ea0b24991aca77f7915ee0446132e2. 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/GX3Q92188357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30393fcfa52e1a1dc277065b1968e10ab594f0c2e0396dea53feb6ddd1e1e5f. 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/GX3Q92188358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e82498485ca1d8a1e928565111d2166c4470272e83d49e4eea9c36e84056c2c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GX3Q92188363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f3d78704da15be873833bd1c6232e064050b0be8ef53781791761c06d30dee. 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/QZMER2206815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8950dd87450f52a6a5fb2d0425870edf8a8c392708dc0d33e4158864e4eb232. 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/QZNWW2277155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4583cf16fb9b500f6eb7981f71996ac44b1e907384c7f4e5a041ade02a9f0e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZMEQ2424018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3157c398a7e0e5bc0dfabecf9ed1c783e18ae5e39fa1660347ae80f9c4329a7. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:58:25Z), 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/QZTBE2466413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbba5e345bbf5b6a95ee03e4ac34792dd1615b6c443ca23b761948663fc551b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZES82585573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25ffa2328e104526341140a5a741e83dc16cbff7d5418f14bcc449e5b2a9042. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:02:49Z), 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/QZPLR2521516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d0050df652fe332a4b7c9577b3ffd512929dee93a978ee83c2da02d5af61c8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX3Q92127302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee44bb21016b369bca8c1f13685c1314704d6180f28542f7e1f6167ba012c312. 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/SE6XW2186819.