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 0x5662a21cd950bab4a57d90b72cc508abd530420f0cc2c15c17565dc4cf80e775. 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/51a00ddd-2cc8-4999-8168-691e6bfde8a0.json and https://artists.proofprofile.net/proofs/artist/51a00ddd-2cc8-4999-8168-691e6bfde8a0.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 0x72e9738ed87fb90f5d64548273912b9ea28e1e6df254fd26b5688b4734d5fdac. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:08Z), 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/BR96D2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb9cb9c49e97482f8127f39a9d19a6edcb54c3c418fa3aee6b89705afa02b10. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BRTW82200031.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a28d4d0e91bfbe0b14f25a7067b4643789523f69b47558f54e0d8a90bbdc9d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:09:40Z), 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/BR96D2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26f6d0237b5f66bd4f0424ddb776082e7d5e9002bb4686c48944030921e22fd. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/BX04I2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb9621c8f76255d4f5c433b38083448e279c927adb1616d09a70d050bbec45b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BX04I2300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0f36b7dabe3a5633a225972a2718f16b728bc6085675c8558b65973fb8d063. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BX04I2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9dfaac3b0638e27fbddb6e8b5e8aefca462ff032ea00144eaef24d2c3a20a1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:09:49Z), 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/BX0142300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70762eab9453af2ea55b4a793c32ae4b3af336655ed107ba9820ffd0d09ec9be. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BX04I2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3870971be1a861feaff72e64064d7a9aa63eab65dbd954de899ab967c6d259. 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/QZGLS2541942.