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 0x9a771c5f02ee60bbf4918d7d0b68e5b5550ed0ebdae8c8ce0792ee663f7c2ef6. 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/857a9735-60ee-4374-9162-5eebb0a041b5.json and https://artists.proofprofile.net/proofs/artist/857a9735-60ee-4374-9162-5eebb0a041b5.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 0x09a4f929ce429372474c1d800eed68500353512e1622cfbd34b25294bf6dbe66. 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/QZTB52252687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede6d3856c69fb69489b949d6e4ae59fa5541a4a7683b016220d5acbe61a3488. 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/QZNWR2424300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f75bc9c3d46ff0f54920a27ec289661a4b19095de55a3c6590223afc00b5b6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES52129142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851739de9f4f40f929fbacac5fef69647259144416de9d76dce978271f0e87d7. 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/QZDA82364282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2209b7fbfa2711004e67e4bd6356b7988dc85235b8e22a50d8aee37563dba665. 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/QZHN52197411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7baf4599d287a70edac42213ff1a03dfa5789ed338197f412f8f4bdcc38061. 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/QZHNC2081737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5172dc6eaccb6f0253e1222c2258225b6b1605ff6c45a8a1cad122558f0aa23e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU8447040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827ba2429603b46ddc5b205d6ab5c7d1d8d3d643b0e68fd0f9c0703490bffeeb. 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/UKZGC2302424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab4f9dd2dd708020ae8744a3c5a646dec168f3e23d6194b5d9c2aed7c8c1d32. 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/QZK6P2215760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b97eb7e9a41df3eea49279ce0bf3227fd95f10320ce0b31145d3e6bdf8c4fcf. 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/QZS632110743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7a088d4bfeabda1be2be6ba9f0fed4818fae393227a4993f1a71674942c064. 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/UKZGC2502529.