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 0x84675620cbc9594269c1913d5c4887dcdde0a8622d0d159394bee9cac7c62220. 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/482a7642-9692-44c3-a4ef-291d2847b699.json and https://artists.proofprofile.net/proofs/artist/482a7642-9692-44c3-a4ef-291d2847b699.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 0xad183812422a2cf110f2072f2fe8221b1dfa437951007b78140932c0db02ef76. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEY472270348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1af10ca901d55c87267eb8eee598e639ad8e48432c8070f0e3d8b71531a652. 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/DEUE12333309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3fbc826e878ec3e604ea77aa48c143814e15577346a10cac157b46fe2830f0. 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/DEPX42200550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b61082dd72991a2a49e180987f6a8c172204e589a86e2d91258fa692c531de. 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/DEPX42200547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63fa2d759ee6ac60cb64af7eaf3cac262405ed0e7a7164c597416c641361227. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEPX42200546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e435c58e320b4804d78687b933ddebd47faca4674052dab48d310bc70bb3986. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEPX42100456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc424bce7a94a7e5ba697ca63cb253be9a10fbd86bb64a7de407948259c3e86a5. 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/DEPX42100420.
Trains, Planes & Automobiles - Fideles Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e24f6f485308dbdc505f85ba4e45992c703c62101b5c49680244696e14b9f55. 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/DEPX42100421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793e5462fe81ddb86b10824a2c352f873e1547c5a133b6579133bda24d56cf23. 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/DEPX42100422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f6b22ad49bf475ec1d1c483fc5abafc03a26b892bc0a212bc6e91078b31e64. 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/DECY52301379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17716b610f59e6bd4f25073dce2378d8121182dffc4b538c9b2d8277d6c43e83. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEPX42200548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442a92d90a1e9d87ef3e6c85406c1240c15f5eb27bf0efbc644b0cbe24f8f885. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEPX42200543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fee6422548bc07382c72453f6c9a19644d95e99670b1a5cd3ab77b31b83771. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEPX42200544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f283ba83e0fb9545e90877fc67f0ee424b46062a9089d66b22ff7f8dcc7ef9. 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/DEPX42200536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff86e7c96b69e8dcad368059fa9b14f73160742a457856c783f667b617ebc4a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEPX42200539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b10dc4857075c08f6402effb6ccdee6fe830dd1daf9bef4db6a73df8ca29ff. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEPX42200545.