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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8790545809e661b612af40dd387c68faa0cda788d786fe7025c9f6092d9fa3. 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/674d7441-4377-4696-97bd-3753c257e054.json and https://artists.proofprofile.net/proofs/artist/674d7441-4377-4696-97bd-3753c257e054.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8af4b9c93d995b29697af4633605971011917356187c6401255253c8335b95f. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZ5591600036.
Brand New (feat. Louise CS) [Dualities Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bab06370c17969f02a35ea40f1a338263a76ee90e72ad4d2195b56b60193f1. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:10Z), 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/NLT2H2000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e49022918804eb689c7bfc385525183c60b38efd80c77092906dd713a160f9. 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/QM4TW2103524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0203750eb6ea1e8d898fc0e4d8de3a4a06ee91395bf6744d56dfe68eb6aad22a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2151320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb266c24e67432262b64704538818c1ae439307d125b5828f367ed986ceb6240. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2167614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2353e303c65038da68587c577669f4bf8b40f737a0307a27f48996d76304237. 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/QM4TX2177911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9bd3766127c20b3dca62ec9f2aa6de21fca94d565983df68ab7273a40ea05a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2153811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4320a7b8950f4318312cbdd691a5d847c26c090e631f5822080c70aab51b9bdf. 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/QM7282198916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8482d440225bf28d4e94b0124ce5c9308de75b77f40ee3c39d447cae7729631f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMDA72144889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9558dab8a16e304c475c1d136236d5fdd87aba9072fc6a5c1be95329d412f0. 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/QMDA72144890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315548e1623cc4c55cada5ac57070f4b48a2d8ec776c48ce09f088331a4263b7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMDA72144886.
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 0xf9af2f3adcd2f58bb32e473d8f8507ace3455099e6cd6c2bdeeb292f2627e9d9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QMDA72144887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309ddcd131e8309a9a2ba0858e03c94c886c0aa55dffccd9d221e0efb4b7c462. 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/QMDA72155039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05bc9fda9939d255772be1098238fbf4b2efd477a810e5349667b365ac5ce16. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QMFMF2124453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54a73f15702762b6c7947dccf64ccc924e2643c5196ff59a6606101b0e5b828. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QM4TW2277509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46be93d0254d5a2fdafa00b97945c1d6bd3b5a6759d2f41909cce4f288adf4c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX8LD2303901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0bf737a04283af24d58e9df317721069878a29803854f67a6433623fb9c096. 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/DGA062306868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552aa721f438a11faba02c19d3df7fbe2435750598ff2c64f1ff0c3700d35114. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLT2H2300593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a9ae6395a0bf5ca2f45fad0177d6a270e77c8cf632956dca4ebb222a947e10. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8KD2339430.
Don't Know Where to Go (Dualities Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfb24722d7e99ae25d8da10106bdc2d05daa13b06f51cb8a812c061383a5eb9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW2140815.