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 0xeec3e4be0c39d7b2055fc2c0bc195acdfe5dbc5d691e0f8ec2470886c8d25f78. 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/e19c952e-77aa-49a5-9a28-9abf764557a3.json and https://artists.proofprofile.net/proofs/artist/e19c952e-77aa-49a5-9a28-9abf764557a3.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 0x9e613a7cb3a6243476fd2269a0c566e53f84221bdbc4975c86404f12f2f74d9f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/DEAK81400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc623eb202f0659e01a3589b9234dc690dd6de54186b4101606da24f28e964ad5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEAK81400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73185f54eaf494cdd5b93462327b06b8e31b33979a6f1bf13efb239a103e3715. 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/DEAK81400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ab88bb7fcb975ca3e7099bc175ff84149001133736d4a10bbf7092e6c65944. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEAK81400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ad798badc67a85c7254986dd126836786b77fb017fc89a84fe45dc7d984165. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/DEAK81800251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7fbfcf897c5a2b6a708d71b6232fc39a5c1227daad3b1984816594622110ca. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DEAK81800247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb750b9d0e08059ce38b094207d535069237b0df830ca3aa8ae67d87555a6e7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEAK81800252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad056447d156ddd443f72ecdf82c6c0ba6929bc8e753d4ed8f5ca6d68d24fb0. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DEAK81800253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1af46f3c3f329b9a0bb5cea60a28c23760352f0bd5aba091ada7dc07e6d32cf. 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/DEAK81800254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231b6659a9bed17a5d3647ee51a5e6f22ef30c33a21ad49031151db91edeaf72. 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/DEAK81800257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca766c9dcab0c3a655fab369e0794b6ae105314312234ec30bf7f84318e22fd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEAK82300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3da561b2e55cd7bba94e57ae2adb044acfd577652107679da87f9c003d243b. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/DEAK82300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be4041c8db01a4ff4df11af339880622b15f63d090bc553c8afb86343cf481d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEAK82300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa66a1e4f942bbdac9d2876d58854c90b3f4a26e601232da8739d6ccb8c835a6. 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/DEAK82300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709e810f8b2d7c95cf705f34f339033087f6b2d97f35a954ff21f3d7fa2d2cbd. 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/DEAK82300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5e7ed3e7adb59ef92b3e4b36c3a0eb7647ba2084134a9ec0ecd80ef6e0db70. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/DEAK82300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d579d2f4f7abac3089c4800112d18937c2f286eb3285cd2b88cfe0a91389c20. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DEAK82300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6359f1ed5a308978ad614f4779516c69bc819cbb521674398bb54c0aef22665. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEC162400989.