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 0x91421bf640845b4a4da7186718b391ca37037e3a3e44371d65020af6024a4a7f. 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/d6c8fe6f-41a2-4632-8505-dd6fbf79db86.json and https://artists.proofprofile.net/proofs/artist/d6c8fe6f-41a2-4632-8505-dd6fbf79db86.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 0x936ed91e07072d3e5bfa9d7a60b2ae0d4bbd87da6bd87225686f64b4dbdbb4a5. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/US3DF1548435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf675e04f954a868dc576c8912443e9c1be92c6450d83732a202f297005ecb62d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:50:01Z), 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/US3DF1614036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2497c2d94a3fd2242a9e660e862f26eb8e5150977bc913f38467dd54ecdfb754. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM42K1602590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2fb4cd34398b0f7fcdeb9ced3fc975587df99f26dc64c31bd07c8cfa920f7e. 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/SEYOK1671953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5c74e3aa4f1ebfc0a06a76b6f3e96c959d625a4312975aafe8484d7d6ad2d6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:30:18Z), 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/UK6KW1700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9654c7cb17d66a4c5458128f5039da4e2d534def40c34f18013fa66e425f425d. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:00:11Z), 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/QMPKX1762301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ae3a777d276935c685ebb650bfe6c66ace92c74762af335adf78b14c65f266. 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/QZ8LD1783711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60930d12145966d548e6b17c46e00bc3b17089c4fac9cc0f009b006f3e219793. 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/QZ8LD1783714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adbd4ae51e6cefd53de3070bc5e8327fa00b224531550ed97f8eeea4edcb612. 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/QZ8LD1783715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee31057e698b386340a93f7962e41fae8e88cdad99bc32775f928ce862dcd1e. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZ8LD1783717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0280e3705eb63cfcc4aa86d2f62d2a35568817a33ed50456c8d7800bd94b3e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QM42K1601266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc86b19a4c42b8548ffce9152fbc2ee4b177e6bad10b193a7a3616b53496add6. 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/QM42K1600723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab2f805ff3efc6f06e415578912d704cfd8a7423ed6dba6439bc470cb7c2d59. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM42K1600760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceacc9afb096bae86d26664b5ad5d41f50b211090ebbd8631ea48c2ca1f37930. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:11:05Z), 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/FRIDO2012521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac7346767d522780276fa849ebe6befcf5ac369ecf074efe3a0e0da14ced7dd. 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/FRIDO2012517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0239e5ade6ade21ed2f889d9e1a6aa54392a5fca434adbd4bb6df04558dd8cb0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:43:01Z), 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/FRIDO2012452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1ec3c8075e050f5c17d0ea4e91c65f64a00a1d2c970006ca61c8c3224696b1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRIDO2012507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17c737d36dba12769a92d875d917632fe94f181b7c9be1f2c1ef339d6c82f19. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/FRIDO2012513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c4c7d7ccdf78c10903bc5b128eb803e3b0a639c2368d1fd49e082f76111e3c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRIDO2012514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d9a00d86fceaf6adfc5bdf309caf4a0e80fc8731f7dd58a98661054f4d87ce. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:11:34Z), 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/FRIDO2012519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20db861159a57d319480aa98cf4e2c3af01c4aaed21d19998757a88c979e75cf. 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/FRIDO2012522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccec751f7b099f4456d54a1c53b878ff5430ee7181cef8e3294eb5ecae7f93e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZDA82403537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb84b45de424003ba8cc10da5a2378f029eaa8773d6b5196993e46c605db1804. 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/QZDA82403538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af05eb34baf09262e8a4a2437964f9f391e51d8f20a9468b699c3f571bd15b6. 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/QZDA82403539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe522d704c791783fef300c2e6e101a9558de7d6e080246b8d4c8442beaf28740. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYY2429073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd459b091dcb78848550a449b1c4b344fc69f9b99719070862f5dc983dfe5c638. 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/QZDA82403540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b69b1030ac8e88aadf29206d6108725eb3f775b5eb7bd793914200a1145bc66. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91729130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1096bd0c11ed29ce4fb36ea5890862834c75152d6938c950cd28af1d0194d738. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZMER2353669.
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