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 0x1db5aa8987e15d400d2dc968a4aa32581ed972775353d4f20e2d862e1700852c. 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/6f66946d-a6a6-4f77-b6ac-ba71af77cf86.json and https://artists.proofprofile.net/proofs/artist/6f66946d-a6a6-4f77-b6ac-ba71af77cf86.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 0x1e469d1cbeab1749c5b09c9f68316fee258de20ed79ef891cb52599b6421c29e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INS182203799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035e834c3ad247fbdb82a9d9b3ac50f90d6f20c72d72b4b09f48d8ac8487a20c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INS182201206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859d70032be39434d73055851f166e037bf4b843757510139208b34db1fcb3e0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS182402036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914d51b4a371953256c6f6f7d2b11f0ac3bf602c01b6ebcd71e27405056faea3. 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/INS182401909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dc3d6ae6971129f02ec744fd0a2da4447b543c7ff385814beb6d940617541e. 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/INS182401233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fecd3aaf6d27d94535199ad01df484af1119349e57a4c2ae6ec0f72d2c7481. 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/INS182400848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64065a8d588d8ae789c71ed8d935c27f2ea8f449c47935cbab964355a5575756. 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/INS182301991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4030d443c6dbe04a5952962ba43c9a23960962c3df8e911da8ccf8332cb08124. 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/INS182301653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816f56b98bbaa422506a6d4a654f92cac5c2dbb979f319b64a35a51679bc46f3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS182300369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d4118d89d05846286be3b8bbe89f8386b7b7fa262595e222bd368aa46cb4d0. 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/INS182201452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3933ce42267a8d6fd22f4ef34f6470c949b38f5e37dd22dfe68c638dac0492a5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS182500798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55ce00fe2bc48e4020775271e383b34045a3c6f7e196673507f35b3d96e8a54. 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/INS182503108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc74bdfc089f72f6e51d937ddfa9d5de2d9006b01e81652d858884d049016f10. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS182403108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdc12c5d17cc450c2ce954eefd6f4e51230eeb77f7162b0287ddcabaae4dfdd. 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/INS182302680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b2736fae12444a92e1aa6388a892c244f78b7ee3593db344d3b62d28c76488. 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/INH102310104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c8dd5fe57b3968b1e4d71b8f183eb49751514bbe23febb90c855646a391aa2. 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/INS182203367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05986005601f3c4b4c96362d09e26610c3aacb404c8f39e2b9a8d3545c83508e. 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/INS182203020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0d9ae9374f9f79d164290e0804a687f872df8822e2a93f73661e721c143bc4. 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/INS182200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd19e159a18c624949c7a5b9eb97c97c28b0e4170f2d72c686e168b3bcdc6680. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS182101262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fe44a1c0a8bcd368364ca6a85b014d3c6a28b217b72ea01f71d79d3641f930. 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/INS182001565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467adfea3dc9b1aa8dc2befe7d85571de055d48881bd236fbbc8d09c2d131a9c. 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/INS182200201.