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 0xf1a386c0d9274140cf31d7b35b0bc32b02778ff5d6a3915bc7508b8885e6b178. 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/df58a46f-9b9b-4ab3-9ac6-3e80a41b8e11.json and https://artists.proofprofile.net/proofs/artist/df58a46f-9b9b-4ab3-9ac6-3e80a41b8e11.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 0xd35a4633d056effa1f7940ab623410f69b9667ecd781a7f209f2da9174a19ef5. 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/US43C1631508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7d093d0f96f084daa06f4200e35522fdb9960d854688df843d82ac9f40b146. 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/US43C1631509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924052daf28b3d5cd325d87945f4c0b39a76a19595bba5e662779dff9a3b2ba8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US43C1631511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004f29854fb64f94f357f9f262b0df35d6371e6951a9f6359d56519da65c4a7d. 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/US43C1629010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca57dbf123b9867fd6ec9e748d6de04edfe51441c35c5e35bc10d66301786fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US43C1620892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b0939edf17869f788b2795bbd4a40968772f522682f8614a055b8bcbbef297. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US43C1620895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ec2d7d90a15abd129bf8564b031eacb0622bddd8ef8f72f8c75d913a7136bc. 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/US43C1621673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4acd8537c43dc6bfaef4f3a78978bf4ddca247e0284794909457a4044016f9. 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/US43C1620904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e854db86f6152793229873a9ab9c5c86e41466a77001be1fcb1ee039eda73. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:24Z), 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/US43C1620898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca57dbf123b9867fd6ec9e748d6de04edfe51441c35c5e35bc10d66301786fc. 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/US43C1620892.