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 0x3a4281d834c0b4d2a2ab96f7b0d3813388c8ab4765117401645106c0dcbafd2a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5f0e385-2e9d-4c97-9989-ecc12a4d58af.json and https://artists.proofprofile.net/proofs/artist/a5f0e385-2e9d-4c97-9989-ecc12a4d58af.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 0xf01b5212980032c01f5b10f3d2c9ad5092c808b576fe3768431766e011282827. 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/USL4R2067440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5901a71f44ceb92cec126cc4153e0084e064b78270a698e0fe6f60fc1300d9. 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/USL4R2067445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2259e9f0c17d773ffbc0697f2e005b6b93183a3a279d609d8d727ad2fc49e5. 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/QZHN52591333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71c9a42a0997dd4a3a01dd3f3153564521ad27265d690ecf60a074c8031c7d9. 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/QZFYZ2544678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc008c9ccc8d6463eaf154be9a3b92289a27571a5a6ec930aeb164a2fda5f30. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZZ792441387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6454e113cbcef03050a14a5cfefa53160301e77f64f1027f2355459a82dead2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFE2439037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90700290c3a059631802378aaefb0d6b4f1bd7f2d01bc665986807a095b0e238. 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/QZTAW2462472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1b9dc29a77db43ab29dfd211adf5502ead390a8fca8dd3565ebd430a819cc9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHNC2464222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5244b3d5cd7d7e353b83c29387f5ed631b0c107d679f874935d57e04ef0915c4. 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/QZFZ72487728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c53844b06914eced94e3dafea281f762dcdf805e141d1f47072b6199d748621. 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/QZPLS2355419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddba252212993d43c87e642187ed35efb1aa620ed3af44ced3496b80ebb3d8fa. 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/UKR6V2310886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f41895376606cf97597ffd155ad84c9a8d76f45a5944f717453b29ef21b40ea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUMEV2306170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd95918d0944bdd6a75102673f84e9c105c6a6e27eb40b3bd774a3ed111556c3. 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/UKR6V2211929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ebf9558724b7cebb9563dbd6dc8c40b0443d3873d80f64cde85360de37d495. 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/UKR6V2116996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab50f6eb093a4d8234655ea8c305b6db6729a4dab5f0c4f633782dd56e5f7619. 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/UKR6V2113396.