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 0xc2cf9ae8d125753da54a42909586b28abe7a4091cdfbbbfd7c59b0948a610621. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02cde524-9251-4b95-b49c-5b343a96d64e.json and https://artists.proofprofile.net/proofs/artist/02cde524-9251-4b95-b49c-5b343a96d64e.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 0x46c09f4b871d8f626a1e54c4530deccf2fb52a6f666be519625f03fdd39edc3d. 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/QZK6N1987868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27b9899cba6ef356c7ad0abc1388e8a73b51a542b632814ae044a6a1c0e479e. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZNWQ2064080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafd02a2f17e1d98bf5a8d9527302e0200b44c1f475266425315adc2ebf68fc1. 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/QZK6P2173166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554c1ff10cd37e4e4fbfeccabbdd31d590d1a08cd5b1670f31a4f62aa1dce106. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZDA52259523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4899d90b5fc61f2b8b51ad63e33e3ba3f4fa66ed8350406f6841b5325a98c47f. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZK6F2304374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf717caf6f78d0ab88c8511bd6c754e7dcf94292e2791045c786cb745c4583cbe. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZTAW2303433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6738368f36d6322a3e8615755cc35df23124342d654f57bc66d365fa59b906f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZDA72410890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa303fb0afa39d4105aa140a7f60f57342dc8e67b0280609ec0c6e1f46813c39e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZMER2486401.
Les comptines de lil moine (Lullaby Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dee0ad5467735469a4e70949a29feeaeb7a25bc58e10a46be2d27b081247fd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFT2523037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cb983a41a2cbd256e6ae304e18f03ab1934aee0860d73176efad677ce3008e. 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/QZWFT2523038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78388b6c978c4d772a0520088914ac1874cb8536af736488d8fee0805162f55. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFT2523039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cf2ed884232ecec57555ae5b86d31abd09f543cdd04872c897d97923832a06. 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/QZWFT2523040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cbe477da7fbc9453f8b7d0cda6dde10a9ad7eacc61984c0a0b82a6fba6f851. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFT2523041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba34722082b9cee1d25f3a831980a88a02958e95dfa9881c80b4d1ce849f9c20. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2523042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2938e13db3954408acb8de4d82c5c55e35ac87ec62c9423cf2e6a44a7c8d4cdc. 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/QZWFT2523043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8873b9ea30635201973e27e82c071e16013400c8c583edd4d0be146c08aeadf6. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZWFT2523044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1818d6770e757638780c0f003065643f64e4d7da1ce38fc09a83b16cb6ca232a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZWFT2523045.