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 0xb112d833dffd73ea2f4927b0f1a8636cf866a09173e980fd491457a40480465d. 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/674303a1-346e-4aea-8910-d93febe29912.json and https://artists.proofprofile.net/proofs/artist/674303a1-346e-4aea-8910-d93febe29912.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 0x3f65c5aca5b3623e8070ae7da0a9c91e7bd54c669a5bcf98a71ad013a6982cdc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEH742315067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebcff0adae7a11d51965010d9e50cdbdb361642137e78d5277472ddb34c7abf. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEH742315066.
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 0x50a22bcdce25a39f9f1727a85d4a18e0020d287432873b717c4efa2b6985dcfa. 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/CA7C62401141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af51b833e3aeca8b856675ceba57712623ade97c0cf50c6b8881af4b8b8fc3b. 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/GBKQU2403374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5d10523b057f6c8a229cdda2ed97bfeed4c3a67f3829f5859eba89a65a6d0f. 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/GBKQU2403375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b73ab68aeb83c0d7b1d66a61f39a4571febf77cc3967ab11058dd07403dcc2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CA7C62401130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eda64a84da89279b367c6a5591bd08b5af4be7c0b6359e507e9f808c146caa4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLV62309152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fcd27d2c964a730bfcc8a412a60ff112a7088def78d492f4a213b64e434edf. 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/GBKQU2301507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9679a9605416460e036d94610aaa4ffa460124b6300bff45e9f027a2d594c3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:11:54Z), 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/US2252341101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae5a2ecfe70b295f6ea16cd239b6ef0e5f032eedd1fd0774d54c82403834483. 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/CA7C62301072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf177492ea808c087f1b7b80a3d9c4571258af53ae7c3fd8b6de8c9f9d0b560fa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CA7C62301071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ec5987a4e3ee912c51114c806f1f9713350402fba3a5b238689f5c923538a6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US2252340301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2a5436ad94eae86f6f17697e8caac922f45c06ecc18ed5ed9c02678da30f40. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA7C62300995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39e7a527f5445e2a47753d3f0167daa4e876a8159e3c974eb63ecb607160948. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CA7C62300994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69db443e5d4da74f65e0a1939cb79cb97649517d7f18cf4870681aa559911a69. 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/GBKQU2315074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6810c52a03cb3f4fdd8dbb3d477c49101e257cef537952ff77db751c1af2a9d. 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/GBLV62215545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f373d92fd83e78a27800b032a59855cbea6297fe03360e788ea98a1ebc7a060. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR10S2302834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb654646b019ecceb88347a3f0efffc7250aab784f469ef527f5772e04b1aa5dd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLV62208696.