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 0x06f2e9e4d9d02b201bead8fc31ce8ce509aa54686a0dba073c31d07abed02793. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9616bb6b-b397-4f63-914c-d237828c62fc.json and https://artists.proofprofile.net/proofs/artist/9616bb6b-b397-4f63-914c-d237828c62fc.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 0xd514d176ad2df33f7b002cc47eaeedef338096c2cad631886e77244e0e3750d9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7W2558370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bb122455286238b40e7a9870882a79b3d43c087ea8e5c136a19f8b0bc9f3e4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7W2547745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9941c28b583b8cbada4b92b2176f8a69ce89caf8abef028e3fa6cf91e283b3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3EZ2576612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3180090c303ff42959a8c301564cb7984fbb6b975a2e60ee19648e73921c3592. 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/QT3EZ2586526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce1fc21dfeb8b56e62266ee7c5b57cb9dd1bb42770a85807f9db2951dddff56. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3F22506897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50305d361c95bbc1dd59f29836ae5d78c27032a1807939d2fba075e93ea4add4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3F22532726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80a2d2c88694ab0aab3fe295e58ac5dfe7550c82ade11562290e8e9468cb14e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F22549946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bce6ce9471e2806d2eff04fa450a75717dfdf4c3f13fd5d87e62b8f64061853. 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/QT3F22562043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a07cfac4efbec1221a564d43a7366f5affa7796e0f893a26b4002404e688ac. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3F22583264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ab49a7cb96eda3bca424a424f5846b1e1a7a2e0d087cf3a3288c752d0046f2. 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/QT3F32507456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89f1e396cb4803168ec6ac8e636252c597bfbe9674ca6d8d337df30a880dd8a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3F22579721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a841e1ca73af2e8c34fcaa8b8c87e441c3473575714f0b5e51c7d9f32570a35. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT3F32565051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d38b8c8840f8cafd6ea7425c6e4d203031997df8a30732d2edd360b9f7ecbe. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:18:25Z), 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/QT3F42505028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd4e05ed8cb463dd69cdc61c8df61bca82d7db723b6b0d93f4fdb73453b8da7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3F42524622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dba721f928e7055a2e5d76a1b296d1a0933693ce6c788e2ef446abbee16740. 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/QT3F42553396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c46f32e1073a3e1f85ffdb08009cb302f90301e09b353142a59c03b768ec392. 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/QT3F52523272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd05884fb89934631895b13cd0556eddde9f3f5c2c732ed66001d7ad6335a50. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3F52516342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caef0ddda9379d08968657f844975630e04d75705c4788bda925169a5c2c083. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3F52507939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced16a920f5b65fc254668532bc133bbe39f4d140081d826fb0c42ae899800ed. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3F42593340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cda15d3b7430d73a5f68e54d2ac18fd30120117e0a242cce5b781ee035b1d4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F52501185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7992b31fb85af5d9048f4d7cfd4ce519ab269f8925c2b464e882c8e4832a8c91. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT3F52562791.