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 0xea2ded8db7792b7a993716778154e03176da7c90f9b70f1409bf4c7c1ca826da. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc624d69-224d-43c5-a61f-77cc2727fbb8.json and https://artists.proofprofile.net/proofs/artist/bc624d69-224d-43c5-a61f-77cc2727fbb8.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 0x41b57ddda2f47eaff531e988084ceb6e2978d0df149c1dbb595d9a239c03858d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX4R52222712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f13689c5cae558325eff92f4c7f84b331091e0f1bdd2d1e362a9f47e0e2108f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GX4R52275952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf056141438982e20cf1dad8db3d82132f5e26fd8c304de091b01ba7050b91ab. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX4R52254397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff49bea4368b83bd0684bf4bf86a9b921ecd38a07549b384a5c09493c5223b7d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/GX4R52254399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b728c855d8634e20c5ccad5cc0c63b89ba31756a5fef297d7a444ed79ad82d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX4R52254402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72a501c3b105bc2043ebf2088a780dbfb37cd53d88a7cc56098ce03bbcaecf2. 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/GX4R52254478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732e36aca1d1255430be842a1a2a367b154b69a707a29cb8bbc9d36fc5fbd119. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX4R52254431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5c8380ec900097f615fbfa087038696aca67cbd94ba2f733ab0d8d79ca2b3d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GX8KD2225690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2257559f5fa5e00a6631977ba851acb24276346203d28ae28ac81cc3e01f0125. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX8KD2256193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6e6e2d941d4d3f7314d3a5dda8a8bb0699fd72d170b269dd588f9dfe299524. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GX8KD2331802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf7f96f6d3a3ea5db68879bde64c10282d53fd3e8d74dd6121c395ffd07ab70. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX3HH2364516.