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 0x73f136428028f5255b6b5d918b7eab2d8c200c0e989d7b8d4fa79df23e6ac112. 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/831963e5-e1e7-4985-b85a-6c4128ff97d6.json and https://artists.proofprofile.net/proofs/artist/831963e5-e1e7-4985-b85a-6c4128ff97d6.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 0x187280cc169baa01a22454c9fe426e3b4d68045b22ad6a1aa2628ea331be24c7. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:03Z), 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/DGA0H2417756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9fa56af700ccb9a1614ca4f7ed14efb504ce1d35d14ed15a60a5b814ef8ef8. 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/FRX872401852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f2ae314fa674490065aaa87fb7d9bbee6812c30a3a6aaf4294459a34723de6. 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/FRX452446256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69ce5cd700ff2e812b067e217c8af7388a9056598e065c1f17579498d4a2bec. 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/FR2X42415414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fef0899f8d0c3db14dd6ad7f44e2373989330b975b2621ce6264cb50e6b4ab9. 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/DGA0R2329200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d36571e1022443acda9aa6a5671992318474021aa9fb67f313c0fbfa3493ec. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:49Z), 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/DGA0R2329204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c741bb54d7fd090bbc9729e3b7481d9f07f7313fc9d792e45469f77bb79ddf. 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/DGA0R2329214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38039da1bb316122cfcc794d9ec09fc5efce17d8791e636e25112ef825b2b4b. 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/DGA052295338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b4075b4dc301b669345cb541df92ae68571727808a2f898c952a8a7958f98d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:05:35Z), 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/DGA052295340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab989cc669581968cc4b0eff0a9da349ec646929f8f18ca496929d584375d511. 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/DGA052295341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fb0d848e6e3abccc5cb106e86fe85382dbe8efbd236b92ca9c147f7ad2ee2f. 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/DGA052295342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf4945346be1b734a9ccffe7cd386db39281d27e5d64a6c979cc7bb54ae92e9. 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/DGA052295343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73eccffe3df34a7367f5f38f15408ddac0d958a43b5ea0176eafdce7b80838c5. 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/DGA052295345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548e2fe2c39bf64a7e33881f862b55899ab64f78035ad3e0e65ed15d7a33a163. 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/DGA052295347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0dc4a138bc182b3b24eef0138949b2f8e9bbb95f4729c08d76f71d96294770. 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/DGA052295351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72a1f0ff3ed2ec1a739beeb75d45c0ab1a47f7b7b40a8041a2135d3cb23da08. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:13Z), 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/DGA052295352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e43182300472f38c5a222aa856f533894c5012be5bf623ba2af81e7d03d110. 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/DGA052295360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2574ff9a4cb95908d0741fd279a7508fab740d92e57eac9afac5ad9f45d7a41. 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/DGA052295362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b1cd7ddd0f25fbb5f33baf5a2cf103405fe312f906b7495945c12bcece0aa8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:01:07Z), 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/DGA052295370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e164a40f0896e30c268c66a246cb1a0e68a81212bb845294f49cb037877b76. 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/TCAGA2288083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8a5ed3f86c317f416701d41c8c9abb9e098263412ef952119969858a7c382d. 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/DGA0P2301871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e451a058bb342cb8070fba029950f88f6b19a739ad32a13cfd4fdb89815b1d. 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/DGA0P2301872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54690b8bf0d97dea81ad2d4f3b0abee9561f980fb76046004adb9c24f68ade0a. 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/DGA0P2301877.