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 0xeaf448ceca7c37aa1f9a316cbbf8008bdf2bc5b3fc036dc76ca6bb87b2ee8482. 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/f88a96c3-24e4-4d31-8a91-09fdf66efe6d.json and https://artists.proofprofile.net/proofs/artist/f88a96c3-24e4-4d31-8a91-09fdf66efe6d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kaptein Rødskjegg Og Sjørøverne Synger Thorbjørn Egners Beste Barnesanger
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 0x40d5956ea8e795b70cd22e2e6cd3b12de3dd1e2440a1e83d3da43bda6d4631a2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NOUM70700622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107650bfc15d4cfa72abe1a47470fc60b3503cfd6c38eb2f45844b4f8c921956. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/NOUM70700635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e25c456e51cdf0154ba7f5c013a1a69dfb9a48dfeaa121a51ec79c28e98064. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NOUM70700628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049037cedc4bf4003eb19a5fffb4b8ce3d241238bb8d043c4959e4db4e8e14c5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NOUM70700627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a7a3cbef1ca2c671f87612c39a762f821c792412b6b9da72beae700eea56d8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NOUM70700630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9fe5c4267cdc42e8300f82dd9eaef8f42d13bf9ed11f2767abc7e7cc16dcc4. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/NOUM70700621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994e9dd6109ff9ba0869498f4c4dd89ed713f27f25469d2d31bef8acd19f834a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NOUM70700633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83858dafe1a08f2f70e6fd8f9bf87f5fd13604720013cbb404ce2f86558224f5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NOUM70700629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa31dfab7e83fc9df83d8a16e79f24da083b505524e39e21252f840884973e6d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NOUM70700625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1d7ad0765e84f5c04cb209120b2e77dc8f26d63616194e8e87c76c6998f09b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NOUM70700624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa578b863ac438c87819fb49de024c5551c6afe6a2fd9a179a00d47154a568524. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/NOUM70700636.