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 0x328ab71325aa86b1e2fa5622d4bc54fe4963ccfbbea8333373b8695e8a1e7329. 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/806b8d36-d143-4449-97cb-5b2649a4aa7a.json and https://artists.proofprofile.net/proofs/artist/806b8d36-d143-4449-97cb-5b2649a4aa7a.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 0x10498fe381ed6ad672d35b337e388447f770e7e260a17b954c8f6f5cb4773d77. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM6MZ2443663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59da26c028ab8a34d4e17ebd7346d33f14f2e224dedd341e79f7a8bfe94d8f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6N22448455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedf43c67dee7a1668d5ddcc37c595e2773fbaef9a1af1e13e5823b5efd410b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6N22448450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f06061d975a43f96923b9b876fe3d51d2763f164109f4cdc81587d2e7e1399. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6N22448452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98f900bbee02ff9dd42caab2b9eef5c5decd1197febf1795facf9f1b2e69e7b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:01:12Z), 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/QM6N22448453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe403f4170f9422ded9611036981d135d9389540e3db8e53366922524061b8543. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QM6N22448454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5f7e8150fdfd515aba6e84cd85fe6713d1d39d63d3c51ef51ab42f45eb6649. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QM6N22448456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc08ae096c90f8fd267b3dd5aaeb0f1300920fca54158e41abba34bf5231d43d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6N22448457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10498fe381ed6ad672d35b337e388447f770e7e260a17b954c8f6f5cb4773d77. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QM6MZ2443663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5b178cec5d9b4a6de305d77be3f0627e334c35b3a40edf9887011be524c832. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QM6N22448459.