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 0xc4727e145f56f73da44aa5f3911d255804dd0abb9b73a1d68e2894db8db68b93. 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/4a5d9344-2b61-486d-ba11-8a17ce40e0c4.json and https://artists.proofprofile.net/proofs/artist/4a5d9344-2b61-486d-ba11-8a17ce40e0c4.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 0xc3215f0dc4e0f9181fa40d6fc5f08b272636e52d10bec54cdcbc02861b62b38c. 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/FR10S1987612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7c62c8e5509622dc23db77f1d0bd07f9752c970ca1fb1e2c936d472243be41. 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/FR2X41913386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dacad2d2b2c4b3fc0abdc03cd53f65dd41202353c62cd2611ae2e8033e858a3. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/FR2X41913388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f90756f3ac4f3ba9ba43e056873c684f33994bd4071a93a409b0924508cfda. 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/FR2X41913392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b8a29e707a45f96752d44943ee4fe6e54c2630ded725cfa590a675849dbe95. 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/FR2X41913383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae87bdbb7c8bd94244a538e46759bc993dc7e5ce783de8046282a983c662c50. 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/FR2X41913387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830627a75772876019657473d0f2478fdb76a31237cf83602917ade644454ba5. 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/FR2X41913389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb22cff78a02366b09e7a6672b0b01cbb2e97f1b1dadf7ccb2b0cc131ca39c3. 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/FR2X41913393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0aa2c7bb750031f82f12fb1753932beadd9512feea4170a11a6e2cb433c17d7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR2X41913384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183d78454a514026eb8ead2b05c52fb897cef928d1acfd0705f0f0e1f423cf1a. 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/FR2X41913390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa24cdf93536fbd68aafdbe36f2741560bbc5f7cf933890cde046978897c20da. 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/FR2X41913394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c0d4fbf07dbcf1140f230370f8664cce4def0f6b33b02c35bf4d54f2eeb58b. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:31:39Z), 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/FR2X41913385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd027c58924a5eba3989cb3d49b8c9501aef7e373efa9f8ce6bd87fc2883983. 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/FR10S1960078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea86230399da6530fc37ee44e227e852ade38eec53b9e3621a2cbade3129a7f8. 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/FR10S1960079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3899e8222285b906d9fc2ecbb4a75afadc65e3273aafeca860a6b51d2a103db. 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/FR10S1960086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cc5047f2fa0cefdd82068524a469b63ad9abc3632022623f2dd078ad7cdb24. 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/FR10S1960087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7b41aca734a0e2fc6fc2f161b29ebdd929005f1d6ecdce96b1e004f87275cb. 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/FR59R1691273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01a6147d6c60884bba8f6cdea95ef90279991b1024212058c4997d2917fe5e9. 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/FR59R1691274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e304c6ecb67c9c575f2c146df630c5b2ff1e75cf87a4e8bc71d1943391a155. 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/FR59R1691278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0a7e0cc89734f944fe87eff219fa9608820e34ccada6de7100bf299402bb2c. 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/FR59R1691275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc15546451d147138400d91abbbdf5de5ef4cd92df1d3463ad24918a31771c6. 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/FR59R1691279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31130473d31806ae6edc500bed177bffccd60ea93db926bbe1c1eeb5973599b8. 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/FR59R1691276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48108d2729bc82538f9bbb7ee95ad7074d04cd52d8ad792abd1c750949588594. 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/FR59R1691280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80200b1d2a91c82c4f13a90bd3e1aec0638f0a845482b223656115e1ae2a97fa. 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/DEPI82433470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f13dddc1ff97d41b22a4f8db13b2c45011963ad4b82772f82622312b4230c7. 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/DEZC62434602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee3e80ffaa80911f8b9f2aae9197444731cb6fe7dc15d96dc3780ec64361907. 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/TCAHU2450846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec6f1645e45858c330140542d39f77df90c27de391dff0c6a9223acaf748bf3. 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/TCAHT2480659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c073187baf05362c393817d6c5a4372f03e11a4cb1fe8066bf5d939218b0b5. 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/TCAHU2450984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec6f1645e45858c330140542d39f77df90c27de391dff0c6a9223acaf748bf3. 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/TCAHT2480659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30335343b7b03387cd57f3ef5519c3d873f0a92046f21111bc67f944ea76c70b. 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/TCAHK2395853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd439e6dce761f6d39dcab6f4f7c9e5f01e8de8a48c8dee2716c69d3fb0167c9. 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/DEZC62362585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d170d0a8afccf16c9bc5c4189a7405507160386cf53d3d2a0d4bba167fd7ce. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEZC62448012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4293c42270ca8a3ab48b87b5ddc07033dfe7b33cf2793e91d16642d6bbb50f6f. 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/DEPI82220633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa041aaaa1b8a63750625d5a845867198f1f798fd242e1697fe7443432611933. 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/DEPI82208009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6786b63be24dff12a967f9f2557924586a42b058c19c9264e8a4933e212dd3ab. 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/DEPI81906461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b138ed9f866a1b7d30fe638d1d54f2615cbf36d9a7d43c58193f33fe2d57b83. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:57:26Z), 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/DEZC62438047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced3afaa3eb733f5373ae390b102c272a308cf3223aba78ba50e2a357cd125b7. 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/DEPI82409921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384fff9e530a9958d2721278fcd8c7b623beffb464a10df7403b335a9d238cc3. 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/DEPI82313447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca04f49a9b5e54d5e8e48eaa2c02b578a1bc1cee781dd06be9c4057f1e971fba. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:35:59Z), 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/DEPI82114621.