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 0xf8129f849da011a4b07e76a5e7916005c1659b5d0f91bc2f0533abc900b35f3c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04d4f9fa-c00f-4893-bb5d-a4709b679230.json and https://artists.proofprofile.net/proofs/artist/04d4f9fa-c00f-4893-bb5d-a4709b679230.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 0xca0a96f9e010e20dfe2887b7f5c5e7e9618625fa1235d2bd51da83ba29c86667. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLCK41073137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d2dc0ca5dc44bc6fa85aeee2962b2772fc7d195be502ce9c2b5f1c0026d8aa. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CA5KR2211854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dd142b0a110f3e10630dc86593183fb7b194bc20cca43c012da2733f91e1b7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:26:57Z), 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/CA5KR2211855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d29aba433ef3c21bb14c10837f24a257d9e398b0fe551bdd59de2bfeff04b63. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEPI82300516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e961690bcd046e5d7e49c8b3da7131b0b2bb4b46f3942ca2ed6a372af894ec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5KR2447255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d31db7261f96878a490001a04a547450fe868f7da61b3da6b04c0e3b749b958. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/CA5KR2447256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960782b388f0c1b856ff220bfbc4ff03deb71d974f0bf7486d26c83b0f9d0af1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CA5KR2468118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709abb2ff8313589afbee02044497390b3e6bda41739fd26e48a6ef6454888c6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR2493148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ce4d166230d16786c4cb770cb486450f3e98a1ca20a3add0cfd7da0ac574a3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR2505087.