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 0xb0c080a26f254dc0acf4073e6e58c7d9eb1158d34a5c899e0860aa4d58c85be0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73a373b0-ec9c-4dee-8ca4-aa70ae8c35f1.json and https://artists.proofprofile.net/proofs/artist/73a373b0-ec9c-4dee-8ca4-aa70ae8c35f1.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 0xbfc735ca0bf4b6b96cc60ea648848d044422b335df0f96ffe757f8bbb56d71b7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES72006026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6f99475ba09134565756d6e1b7a715461f58cbb93313739d2b58d4691912e6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USA2Z2001820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ac47862fc383e1d71b51d4b63c7b7dce521dfeef966e6f97b6f72392cb3937. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6P42349281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd957cbe4a47898ac4bf1e0c12829c3384328eef3eae55aa947ffb436bb2745. 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/QM6P42349282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98fed28acd18c6e115eabb65fb700dc38aa280b76d39eab6d4e4013c7a7e7ed. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM6P42349283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772468717b49c46882d811bfc6d9a0de159206de93b029385fb3199af9a014e1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM6P42349284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dade5b9cf61a86343caab9a483ddd34a50ea16963ed2d10ebc69ff737ff326. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QM6P42349285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3bacca2f64671a965f243a20831f5636c014dd76df2b693c96603b8b736c99. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6P42349286.
A Song I Made in 2001 With My Friend Who Is Now Dead (Director's Cut)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a37d504817199d0dbd48ddd637697541663e3bc93aca16e3f8db2d7e19feea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6P42349288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089a1545b6f1773bccabbfb279fa208716d0752ebd17482d806a0c2a1a5a9418. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMFME2406219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75484becf51d5235e7f336569e2dd300bc42c22183acae604af487266aa37884. 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/QMFME2406220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31f81ecd652f24166f5e6b16312b499ada85db59dce8039e79ec1cac212987f. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QMFME2406221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9a3cbcc95816d1e10970e3a573ad0dd689d0c917c4c4f5f614d0e87eb67336. 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/QMFME2406222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b71a81668c4c07dea48dd63e0fd21b25cd20e077b480bffd237377d20b5499. 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/QMFME2406223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea3de6608a9279d0dad76cbec7ba4f381ec6a95a193b721a0f7bd0555f181ff. 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/QMFME2406224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aec6b4b47e0b38011e3cc8ce6943d67fe55677d0e1896c0da4bde66faaa1fa. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QMFME2406225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfd32f8963c6dd237d7e5d31983d45eb7d7ea40feea34470e5e3d5f3ced6ed1. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QMFME2406226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619f11218f1c926d21972fec9bdef310a00f1c2cc792357cf2de48d18df6e777. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USA2Z2301569.