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 0x87a3ebf4c34052949607c3060c751edb62f3cef6656f6097e82c85fe8dbb5304. 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/26bf1265-03b1-45f0-9210-04a0a0dab996.json and https://artists.proofprofile.net/proofs/artist/26bf1265-03b1-45f0-9210-04a0a0dab996.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 0x075706ed09040a54617c7de9a35cf6c46821f1817361662251ecb3ae05633407. 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/CA5KR2048383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa924bbce688861bcebf6dc038f6bed2ff443828ce19145f730ea56c3cb0bbcf2. 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/DGA0L2394156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187fbfe32589bb5f5e85327ee004a4f27d999db3404e93dfe1a7f48fa35d131b. 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/QZS7J2243238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c17532981f58800ce8d482fc3b571667559fabedf19de5da8e4dcf4df8004f9. 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/FR2X42175274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c86f7da194a06efb1f9edc53d7f41d968f9e919c61a12c82c1dc7f62d3375eb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR59R2414299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a697b1433c74b592aa9b8a4d5da1a9763e1d1114068575a6a9a5564d57aaf43. 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/FR96X2430015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f395b000710ba5476645fe953e60c0896ff28824c176f7954548b0479766a3. 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/FR10S2438230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50ea9abd82a8769c7e44f4e7984c9feb37d495087574aee833cdc0ef77562df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR10S2481828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8376918c8ecc6863c96213b9b7a5779e95f6eef628921016dee96bf50a1422. 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/FR2X42423687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03dc3295c26d51ad868c1dc891d30ca5629dcfee54aec7de528aa28a4731a17. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X42476067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b01c3c7c2bd4e4123565c70e7e8e2d05448cdc4b340651ec453a7b4816fd929. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2449899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a47715164f896b1e5f23936961842d441bada6da6ae1b261ed384fe30dc1403. 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/FR59R2492095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a65fbb3a4461284b304a5c95d8c82866bb198ebe4cb95871e75d823021e5f0f. 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/FR96X2430016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b01c3c7c2bd4e4123565c70e7e8e2d05448cdc4b340651ec453a7b4816fd929. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR59R2449899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03dc3295c26d51ad868c1dc891d30ca5629dcfee54aec7de528aa28a4731a17. 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/FR2X42476067.