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 0x06204cef4c59106fcf10b7bd0b1c70e4f68ca86e25c04e247835509abfcb25f9. 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/357c78f6-44b7-4248-9df1-e0795cb6d6fd.json and https://artists.proofprofile.net/proofs/artist/357c78f6-44b7-4248-9df1-e0795cb6d6fd.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 0xb2fdaec68b6ca871c5720d8f589cbfa8361ebfd1faf32fb931f298d5e839193d. 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/TCAEM1986952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23efa139889b24072270d7d485bf0825e4db2ccf36af16a8bfdcc7f5a7d0706f. 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/GBKPL2288491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb0fc0b02ce27747666ade2111f46c715d27369bd0ee8191b2e66dfa78fd321. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2288492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764f0ab8c74140eb44cf3df887a2a48ddfd35e1c4cd65fad07491f33b35af7c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2288493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb56a11dc98a16fcd7595c82a3e9fb78c13107005bc48f9f05440d2c3f566920. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2174017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc199bf165853831021d199feb0e53e22ce1cea2a6c4357976e0d97ff05294667. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2288494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd784608ca4d0aca617240f8d0e533be43b59ccc462a0b12a87705fed8321da12. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2288495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55e3cbe43803f88a98e5d395dedb125967b17183e06682b1dab0741a6a81349. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2288496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9716a30ed5cf971e1b3757e8c54ff7a51bac2115325d1c30c1a9dff87440a89. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2288497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf989bc4355ea7c56e07307fa5aed28363baf7a19000a1afe3c7ea3983428c652. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMRSZ2100565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855c954fdd4ae6a91ae05c00f48644615c42db9acc4847aaf5f29a2aae0415fe. 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/QMRSZ2100566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04389f5fc43d9ba90305962b9106490b51c91e76295c93e45416b85da7fea469. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMRSZ2100567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92b69462bf5b2dbc493d3398dbad695ebed2fae7eab1e027c120bbbe686b525. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMRSZ2100569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0499c130d53e9ae64304b7f470125e57857519c6784f5a0ec0f70d18a514bc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMRSZ2100570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3517c2b68e7bfcdfcdec1ae1ad802f0f258120244b1f9d266ad8d72fd2f0dccc. 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/QMRSZ2100571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc963821e38fc8ce1ef8f28e476127057e3d588378d80f7d6ea983d8d716b476c. 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/TCAEZ2008489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58bda21fe4fba46977a777c03758b658a4f9ab6e624da7a04cbb9a545d96083. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEZ2008493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490b38a8f5c34a4564b25d616a27986af09d63970fdb4face1c22d740b6326f5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEZ2008496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd10cbeeecd178413186bcb051dc0b9ea03bf0dbc727f3d1d836a8af852ed53. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEZ2008498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7929f7c148e2e5080ab5a6a57a9d3188e899c3c89af176ec23ae6317306ebe. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAEZ2008499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf60df23a7ac2f83e5939f09af458c2ea7f8a27ae7957f99bfe3342a949ebc88. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEZ2008515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32af1a3fa6b447eb19c116b9a9536adf19cd3b4ec111d4ff22413e0ace444ea. 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/TCAEZ2008518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed68919ce8c6870dccf58dc3ef8e70964bf5640ae2c7e1a80678ed64f4749ea5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADT1862951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b66fcddaa759bab61dd5090c584fe09ab65b3452359bfd80031f0a277e77efa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2451476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd6daaf98f7bbc0dcfecd2e1feefed677768632e9637a5977247bc741d6ba84. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA72339491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee136a880dc390ad147a89c4b42b49b4693c0ab0745f43b7b297bbfe7f95a3f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA72339498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd11bf1c55b9235c0fa305f878d0d0c6c2704a2f49984af01e4505435ff7a134. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA72339515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf99b5a4967cbf0d6070e43dd42927e7b2e9e1776d149ed87dbed04f1a5cb26. 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/QMDA72339516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b83b1f6a2662ecabb22892696eaf444bfc0f982d66b46860b8792190235946. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA72207060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b69f076a3c3393034f10d2129694209b8667a5d8a9f5fdb59beabcc8d6e2ae4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA62242999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5984117d3d15bcd4057a7dacb7cff2387f1577aff7feb6e68125a350051b717. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2212936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecfe9465ba5a8bab598420295c5725fad6b56fb604d4e98cfe7c89541c81bf9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2209273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7378eb43c9666c63edb04bd04b420f0769343349160745edead59b4e37120ae1. 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/GBKPL2205572.
I WON'T COMPLAIN (feat. Tom The Mail Man)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8195c984fd3c60ab88ffb2f747430c6971fd68b81a51307a1b7eaec92e555c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQX92104764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a4772e7e7be79b6094a5c16a39f0ad2c77538270f5ebc81fa3c5f0ff2578c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5FA2150177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ec31c43ad170d40a15e5c63d876e88d2219335f53d9d20ca263278cbf776d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMCE32100328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84d3a39e21986c81d90e0bfa1f391b315db594ae9a31214458bb90d12544b6b. 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/TCAFA2000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a57eb2a43633ee72352f774800cc2bdd6024e8fd56c1495fab8ac36be6bd8b. 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/TCAEN1933712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf0f4cecb533f8dc9be958f800e0cdfeb2704c2a1c2f2dcc4b08f73f09b02cc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEN1933722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dffe1f09e2d9149ee8f82ce25f9b03d392017d48158ede22e6e5467c3043892. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEM1900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7098df0c530e30221db45f3615bec51ed79415552826030b493621351be2a2d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUM72221120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7098df0c530e30221db45f3615bec51ed79415552826030b493621351be2a2d. 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/USUM72221120.