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 0x2715ef69c8db2763c2fee18b3b1500b81a7168186a41442d66311f1589a535b8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5beaa7a-e618-475d-93c9-666f3bedb6bc.json and https://artists.proofprofile.net/proofs/artist/a5beaa7a-e618-475d-93c9-666f3bedb6bc.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 0x6f0376136e83ce26e270ac7411fa4cab05e23017257bf1959263f8adf1a4df8b. 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/QZK6M2413408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9276dc23e2d466fd02e70d4d9b12135f230544868ca417bf052bf22bef1252b. 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/QZWFG2312066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5b28210d225040f9f4d237f3cfed629827758964b3dc439fe55c9197ec3adf. 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/QZTB82303325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf665539bb55e98d55fa8eb6cbb0aca6a44b8780d74e98ddae88fcd2194513aa. 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/QZRP42376710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c9d1daf3ec398067bfc67e8d938c8b371797e73f277685f91ada956fd53950. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWT2392449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7383855b0bb34fddb0179191fe5c93ecfd528447fb5d8093e05c0c135ffd443. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6Q2358565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc8480c354cb807965008ac3fcf56db6d0a13f03f9b2cf1093957cfe4c375f7. 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/QZDA62399577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5e8dddf89b9cf40b010955e0f891e81f3984d7e70b526973c64da295c95156. 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/QZFYZ2371359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafcde7950ea0dd14a321ff5da2670d9fd527cdb7c2a1d442e5aab3c63e30aee. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB32262689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6f408d964608478d518a32c08584602ed4a7ccd118cc8846c8543284769206. 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/QZTAS2297539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386438dd402b5cff2d2ed5492b903157c4a257d282294f70676c2bbd78b5c4fb. 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/QZNWX2275749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11739cffea4aee8026a0291c1223db29c32f92a34d2d6a7f9efa73a13b182739. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWR2246589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9282eb07c08c365bafd16d6150fa248198d21af9a74217c024932808aa12259. 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/QZMEM2296515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b39e0f06a2b960ce791d985a0d1be17c20345001e0678437aaee6afd33d32e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6H2293318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aae51b0f43871ef92bdc4350c1e0c89ef1b68706f165de5a537a6e97b82fc81. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX4R52203295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5437b937fd53a4b316953e53bd7bf564c53053bf67653abc35f24c84dcb16020. 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/QZHN52282693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fcc9968f9c6a008d61cd5d4cbc6b26aece2b362b39503c584e934d344c47f9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA82233331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffbc0d9ca0340a032b6880eed8f473b88598e1b339eb73154f3db695c1bd53e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ72249655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5353a8d49a20008fe345aec9e3866d856115a5d08b42f1a07fec8832dfb1d0fd. 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/QZFYX2274397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4cf463c778e7ec4b6ae93142a64fa29ddfaa31550077fc04a1c1b059bec40c. 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/GX5MY2169772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ec2ea028ad55df5ab43edd94cbdc56be56ac33bf25068607bca2427f1658d5. 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/QZNWT2125521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03b353ef74cbe976ffbd630afde9db161c1391f49f2677965def44650c2eb4a. 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/QZMEN2194992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a214e49d57057e78c966fd7cfed395fdd9c31356b2c8b875fc73f16b245b3b8. 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/QZK6H2166078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069f02780f7011e3a796e2890a7d92ee4eafe32cbe488e33cea80abc3d886297. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6L2128873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659ac4fedfffa27c6fe560d0581506fe378559ce0ef3ec874074e0f2b3ad6791. 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/QZK6Q2101828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c1055156195fd9dff59c3dcd4aaee378ac237d56a40f2774ebbd2891faa1c8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42178298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc62ff892dad72346590ea048e4ba656920094dd84d267f2c07e4a67f8fddcc6. 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/QZES72153885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417553b954d2454b85e1c8c2b3f80a92ebc0f947ad2b80283adfbeb03cdada31. 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/QZFZ42115015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bf2448d4bcec2ad540c4375489678006e7bb9a2a52e96cdaff6a9d9420611d. 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/QZNWQ2047222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8de0ff2d86867a413c957afb119f47a0fc9321c9d807ab4e90329abb6ebdd7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEN2058439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91f2c1886046a6d7aff12f07f2b556d32b94033dba6d50fd5025def968dd138. 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/QZK6K2086953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b1d6bdba38d35ac92326f27bf8d4204836982a4d5fb71991c45904426cc278. 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/QZK6Q2092099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88073a6aa24eeab0a5a0e5ad79a2b5facba3796c80462a4cc8290f6d74eff1b3. 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/QZHNC2003578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09f4fa40e6275a25cd7aee1f8b47683fd766456ebe57fb92655d177456906d7. 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/QZES52089225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87f43697bf7fcc901222651baaabd952e442002e6ad16c68155e081eb2f60b2. 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/QZDA52050301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d476c39e49b080f3b7462558afcb25b7bdcf4f39654e42515984a6f36353bd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ32085822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fecd3fdfc84d15bf8300ecf23e448ee458d95b5d0e6822b2d05a3d530f04d1. 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/QZES92536877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f695d2f892acb84f3a6244484ba7321712587d0e7d168e1a21025ba969a608. 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/QT3EY2479731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc47b777cd5ada8fe14499b09c559fff24adb1bba51d90aeba28719ed9741e. 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/QZZ772491244.