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 0x427d47a53f50ae1635d153c6537aa76130ca6c2f22a78bd35bbe792d48c29eb1. 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/38ac9064-92ad-4339-835e-a524e89c54be.json and https://artists.proofprofile.net/proofs/artist/38ac9064-92ad-4339-835e-a524e89c54be.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 0x1d616fecef549cdb9c46a93105177ca95192e0427d6a2576e2fab6eba89a29e2. 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/QZK6J2004145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0933358cc2fb7737f8d9207505e6f8c39d009b00f4bcbcfee6f569d650a0b4ff. 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/QZMEM2069059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa76706e48536c168c14698d5379cbd565e46f14112a4142c4bb58924a25d48. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/USLQ22005007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd36f9d9f653b3c5634a20abc0f3a4e13f1825da25b09684cdf9d57caee39ca. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWV2292034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec74253a7f57c7065bbcfb8231f759aa0526eff1b55d26e45d430a88a8d19dc4. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/QZNWW2209412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e0f1ce13232cfa5c5efaa8d033e94ec1515d29d9d421b0a3e72e59d5c4cf8e. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZNWW2206473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc130dfad25da08d9c16987c9ca2c387f16c5d020e828326c746ca13803a04097. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNWW2279620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef7c312afda8a5e301769f7cb4de5122fa5d411347762d036c3eba14d766d34. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZNWW2279621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dbc2152f9242f319ff358c79da4e3d477f33caad32e138c4da28c89053563d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNWW2279623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64218f47514652d0435d2c7ced32bf607c6ea781312492c0c2b8b5632d24655. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USLQ22005013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e2e1b4217dbefcac777f97c10901382a44397db333f9c294b5e2c60077d354. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US5ED2406304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb687f48ceaa70feeb8919784189b2ca2644b5bc739b77fd00043ff6dc40edb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US5ED2406812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed3c75e14f824ecc70a6838d2c4fd8d394d27506cc98052e5d51fe49b5abc9c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:59Z), 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/US5ED2406807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526aab63c8223ad51398ab498f20f281383f0dbf64d4dd450e452b11062f31ad. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:54:11Z), 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/US5ED2406808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfe7ba85449eee7cf2ee50c3d708649e7439d31061567005bffc745a26f1c69. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/US5ED2406809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccd162c4ec4de25c9a46e4f478fed3f2fdc5613553a24e79151aaf5f5c14453. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/US5ED2406811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55faf88644093922928e14cbbf51256d681b19187042c142da0397109e4d1110. 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/US5ED2406813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a5019f6c50d04a361f972317eedafef6b411eef2196117934ba8ae488e9ded. 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/US5ED2406814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381ed6bdf5e548e77db84c851fa4eadc71c7f9662ee7f855570a60574d60e9fe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM99V2411301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac930f480194180e65e07d80998074ee4dba11dfa1520163cd229fefaec5f5a2. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/QM99V2411303.