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 0xf307f2f4a32fedb5adc9541485f7e480a84a2f12877071217d269dddbea22f85. 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/b5d99da8-6abd-49ba-be4e-e5118ecfe8a6.json and https://artists.proofprofile.net/proofs/artist/b5d99da8-6abd-49ba-be4e-e5118ecfe8a6.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 0x1d52e1ec773e7c26c4f437351559e4838ee4d343ab52d4fb478eeae69f3255aa. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:21:02Z), 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/QMDA62395903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce06ae8ccdf3b9af1574dd30d9271c55859b753809fadb630b5322139de5a7b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QMFME2373970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13567020d4a44347387467c101ffcee681900cba072ec0523384328ab20b8224. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QMFMG2333786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c125ab0d7a09d3f5120b5de0ef708d1606c2e9339b959527b1d302f48a3a9e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM4TX2441412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadefa5da8681e6cc3b83b3f1ffecf5ae60b7c2260390051b577db4dcdee2c4b. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZZ7M2460672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d27eb470c64a0906fb358c2782b4171ee70b14bc702b4b2d9723745583ab69. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7R2495863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d27eb470c64a0906fb358c2782b4171ee70b14bc702b4b2d9723745583ab69. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZZ7R2495863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3498a629ac4951fa622d9e9145af7f88f88d1fe33d11fe4b23f6116c312b9dee. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:31Z), 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/QZHN42534366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d4e76fc2dae9f79fba0bcda13b51af5bfee7f47c619187c18bf8902bbb2ef3. 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/QM6P42440596.