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 0x1df0ee6811ec4359cbd2384930414c03113deb47fe215e45c656a34a92d3abfd. 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/11619186-02d6-46ef-8261-0a798e6816f7.json and https://artists.proofprofile.net/proofs/artist/11619186-02d6-46ef-8261-0a798e6816f7.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 0x707b6b0e50cccbffc7f422e5dd94b40f4a14caccd6e4c106949bb5abd7b40ce9. 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/SE5IB2336791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc2833fbf0e99e4fa2b1a9c88b2a619643047a501ca0f37ee4a8f13b867ec10. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:16:51Z), 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/SE5IB2291249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1362953f4640f360f26a317eb417b87b58b4abd3cd7cf23e22d151815fc227. 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/QZNJX2483553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9412fcb62abcd608b94895f886e47e00e28b26d40e878b5e02922edb5670f7c5. 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/QZNJX2483555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540f6a1149335e9ee78e5c716c8ae9662aecfda409bdd14a87f1845704becfbf. 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/QZNJX2483557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb651982d0b17276cd63caecfbaa826a657d1cc7a5c70456fec90d6f6463ccd6. 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/QZNJX2483559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fd95f202a3904d056cece5aa342edfbb1304d9a909e5cf1d5308e314ca0de6. 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/QZDA42513989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29768cad751ddbd9ff024e97b08a1db2c2d32a17b54e703411d4ea24198c05b5. 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/QZFZ72515352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eee5b8f2bc7489087894d341c2f723b956a4c7fbaaee37c1f749d3da4740ead. 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/QZFZ72513774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f98b5f4bd15d4da73c57b5dbf3e30a996ce36cc423a8f4ce0d7f000b7403fb. 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/QZFZ72511362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb257c57b571f1e624a6b3e33c843fc6ff7f68010c983e3b26a79d96cc9a357ab. 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/QZFZ42535667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32f9dfa5202a1e298e1c6a9d9b91274f1fa9e460a43cc74ca1049e62d3da5e3. 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/QZFZ42537451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a99177d0df98a291ef11cabcdc0276584007fd050ef0e1e47c7c5704fb69bb. 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/QZFZ32553750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848539aff66f52a8904d4d7a9202e9ddd637f25e0129d8b8fcb4410321c39796. 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/QZFZ72589273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21f941241fb474fc1186e7f16d50bc87a85e277719d5a95d524b53a2c1430c4. 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/QZFZ32553739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e487995b7a03a83e053cb026bfec3a57b767b41db37a752ef960aa9c28cdef. 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/QZFZ32552269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c6322677cc0f42ab83f63948d701f38d4baa634895df5dc4d6895f861b22cc. 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/QZFZ32550501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2c71bd88056f05327584bfd6b4f8dbd3c183717f19ea939ce73842864461a8. 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/QZFZ32550450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f8908083d6ef7c5d5777ad207e1654a4cf661b4dfc5693cd11dd7056a214ed. 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/QZFYZ2578959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd316d9c7d864ec36d096c8e51947f1f2eb2012057a55096b19118b7e48f528e4. 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/QZFYZ2578940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f390b1d9d6512acd1b23ddea31c002b316c52d6eaa716dd6306ae27c4693bc2. 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/QZFYZ2578939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e0f2d5e4135f75b0942010c206214497a853428e9d7d0cca2f82b0268c38c9. 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/QZFYZ2577360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebce03ee73d7b8e2b754c3c1c19a9cdd2809417f5ccf0f47f208467f8534437. 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/QZFYZ2578908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920a8354c01add7585e598835a498887116bde04f1b98865ab0761561c366656. 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/QT3F42418574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7412ca7caecabb82faad223e3853e0802f643f9d0631c13840720f56521ca1b0. 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/QZNJX2469858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7ca375b6c33a40a591a1b0b61f1844c83e4ddce6afcab50ced055fbaa79f94. 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/SE5IB2300992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a77efc0b19b63d1603693f3373df6a5a53b799a77b2b9f86af9fd1c2ee10d7. 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/QZNJY2438967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82846cf55d69e688e916ecac89fecf100402657b50f36acede30cdc9e569c07. 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/QZNJY2438968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa438229157d117b41f00015caa2a6ffda3e6b21dffe3227feac1c080a222cb. 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/QZNJY2438969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cd858d5b20a7cd2735902e8278bd87a8da6fe4e9a262a2933784932b5e474b. 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/QZNJY2438970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd439bd48fa09a1f874422a75ea4ab42b95fade886a21606a0f4fbcdd71b571. 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/QZNJY2438971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba863ed3e6a1015e63474b2a7c54ef9259f5ac25eea37e8cbce1bbf5c5253096. 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/SE5IB2101937.