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 0xb0e147aedf874a7b3fe000d9455e68a43625f15c84799fa0596216acd99e8b3e. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f27608ff-5aed-4db6-98bd-f3ad55e3d2e0.json and https://artists.proofprofile.net/proofs/artist/f27608ff-5aed-4db6-98bd-f3ad55e3d2e0.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 0x45159543f81db3902ede66cd50673f1f23f03c40258a1b33407dfde76bbf8ebc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE45H1800703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f2785e668ccb6fa5f65449542f3fa31b6b8d0f2f3bbeda3b4210201b0ef40e. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/SE45H1900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd24b9c21a12a575d2bd8e7fe23f1e78a105d7eb201d84a2e2455baf3041384. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/SE45H1900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad0d2a7bc1c995e6460b49ea191013443f08f245a702d3df7032c7213f0f171. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/SE45H2300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1f11fca1f02cedb0307ab8955827c5278ba6ec3287b59cc9cf71ca1256a7d2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/SEYOK2428266.
Jon Iverson Meets Prins Emanuel, Golden Ivy & Inre Kretsen Grupp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b044079d483e0d03365d82fb7124b8714b004e28f77e78ed22ec4693e1910f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TW2363076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d00cbd48132eca1cd3207e7d52596dde6319347954b1b9f4c62a0db659f49b. 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/QM4TW2363077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d08512bd19cc5b2ad4c98ffdf44b2cc542ab843407008e737af757ce169e404. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM4TW2363078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d66a9509876364c0e096c710ace4800b5d5fa49e66affde88d24a1ccc38e8d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM4TW2363079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41bec5795eafbbce41db45c4fccad46a76bffcb7bec414ae7fe437cb24d7189. 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/QM4TW2363080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53feaad9785a95db558a5c4c2ce9190e6758ab945f691102ed08fa31deaab17d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QM4TW2363081.