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 0xb9bc2cd021e7c0622947f8b167cd1ba71f026e6df01f0609b259d168e4ea69bf. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84c00a6c-3023-410e-9634-e4ed5f04b0a6.json and https://artists.proofprofile.net/proofs/artist/84c00a6c-3023-410e-9634-e4ed5f04b0a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x3b3feb46db763ce899c16ad36baa536573a0f3bb4bc6036211f53429edc14a99. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPI102501039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a4c15d4c43e6ed4170f9e76568729bf9d6fcf56c1788f8d03056a99860756b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPI102501047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3879e352df79d4b056bf1c5417718c9f9661fd6a1f0db6df1f362d6ae284f2f2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPI102501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f349e025bab428d7fc527f14a45f9e5f1f429d7d6b9c3c0e7a4cf805373469. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/JPI102501048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d23edb6a95ef8a05d3701f36088d1b4d1fe0841550df4b318d9f77cd6bf568d. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/JPI102501049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2827c9a383b4edd58407cef1b3c09e6a114c4db1c8f8aeca95f8ac3ce97a34be. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPI102501041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc644370bfdd1183186b6a3dc53ad06a3ff4f73f14dea1fb806700a9d500d1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/JPI102501050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d822517f5e75e1aa8c3a1b1b480f5a3e54e337541e6ed5446a9114f6344b470. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPI102501042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632c43608381d4d0777ee9802a524a3d739fe980e352d249c52c4425f32d57a3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPI102501051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f0b89a282fee2acaea0f04922bccb7aca6ea1113a1b68682888e1117880499. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/JPI102501043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e9f9b2fc2fd44764c92ae718558bbe5843cd5b2c909eb96f465febedada781. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPI102501044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c641ec4c386591b5fb47d3fd7e1f99b070b8b6d49922752e8e5adb9cc43d75. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPI102501052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd0ab9141e702a165044e9a623154efd69c2b03054b4c63b7e6dd167b83e478. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPI102501053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf724fe390b10503f0c582e1b4f9b2294fb79ad42516fbed2e3b72e9e036f11b4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/JPI102501046.