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 0x36ff0dd7cac8ebd218958ad491fc3c2e77189672c30a653a4f4187feedad5691. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef6fe9b5-b504-462e-a72c-97d8cde5fdf7.json and https://artists.proofprofile.net/proofs/artist/ef6fe9b5-b504-462e-a72c-97d8cde5fdf7.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 0x634590f6e10f979681015094a564d444f244ef680c7af6ad4d57328086efa553. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZMER2176971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc6aef4712218b019e7ec257286e845b8a8dad4a861424aa7350cc0793a0c2a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMER2176972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2193485973b2a89b0a6d1853fde876a4f62936ed21a03a751a3966a449463eb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMER2176974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e6bed5584c292e6a0870f5a2740099fed2dad9ba8ff8e0cdeeeba23e4dc454. 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/QZMER2176975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dfadcc5f2282f71147d9624e168f4a3e3b99cd7af73f92538cd804853e90de. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZFZ62241331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dea4799ae5b1d5d60c12cf414a96fb916dd2005201f175c55e38ae561c4e73. 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/QZNWR2196011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa274b650f92bfce98ea6a2f46dcf6d20dc2a83ea71797020aa171b3c7d7c1f7. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZK6F2032352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3feb9d65c50f0271334d73a38fff506c5c7f15fd293856189b27362df08c355. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:07:25Z), 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/QZK6F2032355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bf7d9689e59507a2827637923e8ea07fe6f8e3abd4f5982064dc93a42294d3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6F2032353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e2fdbc5d758bbf93cccb3f436e42e2e06d9d630849d646d96abc992e06253a. 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/QZK6F2032356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0469454caa2408eec011af24835a23774393f04f190b9006ae288201efee9b0b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLR2001124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9965a20b9ea5714f49f1e023594873d0299ba585169d05be4cb820f79743ab. 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/QZHN82165307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367c5e16383dd9922a8a664f53353eff517e5aaf99e991ce95905673d7a93a99. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZK6M2111609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905d5357579ab5edc2368f79347b3b9757dd47c04ffbffae7aa3e7c2a93fe6f9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:36:50Z), 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/QZDA72268734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaed8fb641b550750932b503fb64ed13552eba8365cc9759586ef4b486ac117. 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/QZES92285232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e5493551f81c71ea76f27030fe107869d9c2b639cecb6d89ded5ca503bba8a. 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/QZTBB2222544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce360299d2f9b8a5cc688e046fb24aa9c287ac8af80eb9642923419533e14ba2. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:06:08Z), 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/QZTBB2222545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2c056763c2f5eaf413cf6a288e066aa953ae93d0d2f2fb56757707f50d67a4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTBB2222546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368b2ecb454334f525ac2e41af257866105b86ed05acdd4d0ad82ee268d9b70e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZQAY2394698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf4d829dd3599ff7f91717fbef4e48d521a89f1c80167b314d19130e7c84f86. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTLA2396216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3375e57377d6b45f97139637eba348c623fa562a75098c4529e86249cc0a383. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:12Z), 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/QZS7J2359285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de855f8523af44b8cc97433135e62d76f4ca4ab17acf1d8501cf41d5da843f7. 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/QZTLA2400272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9396af47ebea819a5d6394c1a761dc7b159d66a52528a7448eb37121e6019c9b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZQAY2489302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de855f8523af44b8cc97433135e62d76f4ca4ab17acf1d8501cf41d5da843f7. 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/QZTLA2400272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b2c87fe855c47a97efe9889f6e356b6155b500d79a6521cc756a0cb9df526e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZQAY2542681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5552e09fcd6b20da75273db9d08f96645212bc0628b7b8689cd9ffb2d65db7e. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTLA2594845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959347fb4975fb0f18018650ba03005bff074a82914a4e08931f9f046728d52b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZQAY2595186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21d35c02b5846334189201b52f664c43d1374d1f82f19b4db0f1e1f3f82c5e9. 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/QZS7J2575298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677bbb0fb6d16a086947300dade86ef4f3e220b4831975f78106610fa5c207e7. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZQAY2533788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffee796ac465096df8c44e8a5ffb93e6bbf834347f248728dec763ddf7cdd517. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:15:34Z), 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/QZQAY2577099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa16a2188d1afb96568c1c852c4178f5817157cb06e7ff03135fff211d72516. 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/QZS7J2592323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7a9ee815b5fa9a4a0be4ea53065282bc898790132fb7dc5893b9afbda1b60b. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZS7J2564185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1337cd25eff829ef6c4f7a0c0649acaa264326b7cc6c687364b754b3d4b44096. 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/QZTLA2503316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf785e04a8c2421f6f0642d6cb5ef55aff981b974ceb206ac65639683dcbcda09. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:13:11Z), 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/QZTLA2533581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e3d6d16ab3acbda34a12feccffb7a12c7ec68d0aebd9b6758a6316935e2f6a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZS7J2584110.