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 0xcf834aaa95f3f43fd6e410a21dbccb8e134f6934aedb8a9a75fb82b0976415ad. 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/447c3cfe-877b-4319-8e0e-6771962a2a8f.json and https://artists.proofprofile.net/proofs/artist/447c3cfe-877b-4319-8e0e-6771962a2a8f.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 0x8f9c0d0b54a9254c0548e482c1dabf3dd057fea6111913c1d0ff753eebbf677c. 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/BRRGE2300055.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab8e2dd47ee16243937eb6cc3c0e0a4cb30f5e392c68aeaa3702a07ed94f76d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRRGE2300766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf423caaa501938f3e2faa034cdbaad41b441712d2f7a2cc31ca08bf604361f3f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRRGE2301124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85db945078b8243a2a2234bca8bf4dbd79ae5892f2cb9859b885f8d0853017c. 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/BRRGE2301126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9c0c4c10d508204a65032534ddab8d6828aa6002ea6f92ee75f3e87f4123ad. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BRRGE2301128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67bae39fbacd89f291b22ce714c5f8e814b7b0493fdecaf90ebab95fbcbd0e7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/BRRGE2301130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512a8112fff652f5cdc7731968189b4580fdf0e5f23e9affb104b028e0c84fc4. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BRRGE2301132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a6c0a6b7c859ac1c98548124c9d65ce6c352efbca5e630f12e5952f380b347. 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/BRRGE2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c2a277b79f77681efa594b79380bc9f4c18ed88bc2a0648534e050b74d56b2. 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/BRRGE2500313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8b8ddf00b44292cec0e9c0ea9d59adaa2eb01ead7164d69d1e08f33f6faa01. 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/BRWMB2401695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987ff169b62dcedb27307185f1fb5d72ea37d44c3bc608250cfb604f6b6105b3. 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/BRWMB2401697.