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 0xdbff322d7db13c4b533f4b1fc101dae81ab349998e5aa8a9cae4222d7d642b94. 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/4bc822b1-b914-4efe-acb6-94234a8b1786.json and https://artists.proofprofile.net/proofs/artist/4bc822b1-b914-4efe-acb6-94234a8b1786.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 0x8be25d5bcb45b5b3a5845d3c1f56c79c8d2f9732d48218ca81dd205e582edbf7. 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/QZLBC2333333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb557f528c617e4158f4f2de534f9b248bf6bc3415eaff0f0cd2c805e8bc1ed. 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/GB2LD2210317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cd3f2f0392047b9f78565c1e6b4ed56cc41e211a6dbeb245a99b37ce9b49bd. 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/CA5KR2229084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036d775804da49d46331bc385ad5df57d6055c923c2ef379b47f2b3abbf7c206. 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/CA5KR2332346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec686b86f65f2fdc2becfa9ad5fef2ef57b104acbd40156701a45d1b154f6906. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2207237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62f67a2e76841dcdd35867999f5b375f106bcc376768cd59635c6d078d0f9b1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2271007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cd3f2f0392047b9f78565c1e6b4ed56cc41e211a6dbeb245a99b37ce9b49bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2229084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec686b86f65f2fdc2becfa9ad5fef2ef57b104acbd40156701a45d1b154f6906. 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/CA5KR2207237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33faf52b1d542db367fe4dbd58c6454018e10152772fd7efa96ccfd8ba687330. 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/USA2P2017733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b10339391e723073e53d75381841170b2ee062b67a842bd3da479acdb69d0a3. 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/USA2P1946342.
Hotter Than July Interlude (with Shing02)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e8e5cf29a5a93c9c62f49d01ff8d4af208d446906a2c9e892fb84f726940a7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZLBC2415950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c355926992119512a4a2925c324d77d71aa09211820679804b9d7ba99d43ee8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZLBC2414967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe794eb8c54f073704cf591ceafcb3640b460d0ac5cb48dd8d98987dc3b4158e8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZLBC2414480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c3fae344f09c12c778819867cae6e4d0195cef10e3d3d480846cd589a61785. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZLBC2416347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da60ce1ea2dbf6b12b8485668ed7928a953f254cb76193600068ee5e40feaed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZLBC2416113.