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 0x5397ca36ce0845b00b682aff6b3b68b4c607f74fa1a5e6da31cd8eb55e152cb1. 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/a0a65c63-fd12-4992-a8f6-ed8fbba62afa.json and https://artists.proofprofile.net/proofs/artist/a0a65c63-fd12-4992-a8f6-ed8fbba62afa.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 0x088ecffc59e8582d0826cc2638606374ae87da4624dcbda03075ea45d557585e. 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/TCACJ1512543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0998b3ee8d54e84b71844111c962e1798e5bc8e254efce8611290cece06e0f. 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/TCACJ1512545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a21756be8bad916cc46dd6f48f97fd85a3fa0a55d9a1af9066db9870274600. 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/TCACJ1512546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3653b139b1a32f63c789783ffb4d9a65b8fb1d3213c3898fa659c55aa4507b. 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/TCACJ1512547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fa277b21358d8095876ef652a7f10ea8fdeee6db67b413a7c4bf89fa392c5b. 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/TCACJ1512549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d7ce94695ddd49a102ec5f4ca0489da23a08c07071c3fdeb6473044f9f501d. 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/TCACJ1512551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd678ca02c391e0545e578617cd845d2b63afaff8b95a882d6fa848d74c055a75. 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/TCACJ1512552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1653687cc0adcfdb559cd4a761ad0308d1becac31df34aa71e9e5ca77e3530. 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/TCACJ1512555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee5cbe9bbb7dddf9c99213daa2cb125198133732ed663d1547bd6eab4020008. 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/TCACJ1512557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbff7704d6e75f616dd9951a319d3885c6e53f50e02ddcd798ff6419dbc2c47. 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/TCACJ1512559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7ca84efa41bb9e27bceb29759f4aa504d2f37fa899cab35974e6124f6d7294. 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/TCACJ1512560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebd0acb3ca37ee3ce563e304945c169e032f32f4838f9be058a10706ca8940a. 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/TCACJ1512562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fe5d3e4236e5f2a94bcebcab4107de17628c612773ce9919460d04d2298cb6. 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/TCACJ1512563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6669e35a5decfa9bb94a187650ed9cf7dcc47241af44c672e8c43066bd1d868. 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/TCACJ1512564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2171c519a86b0f78974276e114c647a8f223e522983d7e08470b233b1cd80df9. 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/TCACJ1512565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e1d34eb686500faa214007a8e9e5f75d562cebf25d8430e763af542a012187. 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/TCACJ1512566.