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 0x7ad481b451ec322ab6c13b23acbc20163c18ce75c596f394bedd2d6f88ae8c81. 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/7155f6aa-b0cf-4205-b9a0-7c0755442880.json and https://artists.proofprofile.net/proofs/artist/7155f6aa-b0cf-4205-b9a0-7c0755442880.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 0xf78936b4c06a23d049f9199da3019d5e9b367182a952bfcb8bf530651215a49c. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM4TX1659369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5a3f3ee95565056dd678920130efeeeadf129c79fb6e53d56285626b188113. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QM4TX1659371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3db3c1efa7a78fc94cdfa5f9ef9f920d805756938091ef94b2726b3f93bc630. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM4TX1659372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad015ace21ea4c1841f693956ae70f1f51b30b21b9369b66799f52d93df060b. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QM4TX1659373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0a5d6081db7a606ae773fa6fab46bf3209d397dce69340a8c9a2f7a884d41d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM4TX1659374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe284d2f2bbef9fa83a7407d2489ecad11881a71f0a2302307d3bab804e67b1ed. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G2011697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6def1c653c86a353526b7ff8e84b244241241962d8f18313b82e6deae1ea6431. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES71G2038322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6def1c653c86a353526b7ff8e84b244241241962d8f18313b82e6deae1ea6431. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ES71G2038322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db84ada789221a964cba181c3a02e19d0097e3a99aac94b7a0cc5f6f5ab29a3. 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/ES71G2116582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c41d04a1198eb2d0e0560898df655618377b49961f9df84f4a0e218e83b847. 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/ES71G2413038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad33b95bcfeda56d90f94263040ff06f57144a656c76a9cd2fc6a12be1fb9eb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES71G2004049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7ec76c4a83b116610a5eef81f8c3bbe05d9346dc084fde6c033498e3bef159. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES71G1952141.
La Primera Vez (Con J-Nics, Sevenstar y Rulo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6cdf6dd1489cc5d756082403450837f3cc407356a39970ed50ca885aa73afe. 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/TCABU1423071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc871824466bf77e9e5a77f73a2eb50fdc5609faa4e4d8eb4334d31d5a26ed2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBMJG2501155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a0d4a354c512b55fe618d427fb23395f97aea5dfab914bc102f6c5a033af1b. 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/ES71G1876969.