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 0x621421e639d0521c24d767d8fb6402535b31928c1516e4f3d585c5bf4c50684b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0e05a38-a705-4499-a7c0-ef25e84f11fa.json and https://artists.proofprofile.net/proofs/artist/b0e05a38-a705-4499-a7c0-ef25e84f11fa.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 0x257fd06a0dd61d85c63a50a87f6e9f0d9bc5f170f487f4d7670b82cc51a2a2b6. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTBE2550622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36cd3efadd7d4f3f64a1572bfe2da2aad0fdea6fa312c2fd0891d7bab793c14. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTBE2550623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf29b2b5404ab91fe1520d3ff6d909ca9dfcd47ee6b10109309b7f843a661053. 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/QZTBE2550626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d7f3b0cc179c5f5bfa8cc1b5c08898cc5f7cf8aa856c71b679d1c74573e0c9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBE2550627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693d92c23ce4d3dc4c8980d339db2b45e9b76d08004b90eb393b8b7452ab600b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBE2550628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33461ee041b61ed850a05fd2e9293c0ab0d4397d409a00d034928b00f155de76. 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/QZTBE2550629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fb9ef1c9180fa91259894f3f85208b3a9b9d87f3418bb4e1a7d422343126f8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBE2550630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471eddf2a0af1e003c3179b5a756fe176bb06d129f3554b75196564cfdef2b02. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBE2550631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9415e66a2fb4b9d4e3b60e957b12bf2d81cd5040291175f6d4745a3175e390e3. 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/QZTBE2550632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf89d3e7c46dc7d87bec51da225cbf78141d84602ffcff3c228f7c664562aaa6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBE2550633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e4ab4446c8ae7770e6c1c7f8a578629d9977699ec14337912563690469a885. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:46Z), 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/QZTBE2550634.