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 0xadf7d9bf359cec99547e595a91fc44f0f79b10565d975487d972768548ce60ef. 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/2ab4c33f-4036-4c45-9931-2d6c3293134c.json and https://artists.proofprofile.net/proofs/artist/2ab4c33f-4036-4c45-9931-2d6c3293134c.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 0x3f5a821219f87c2978b12239439774dbe87dba2a1682ddc0f8935e59a30db54e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:39:11Z), 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/QZNRS2040388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2358cf71aba0727dceb568d50803f9c41aa753eaf011d11753bcf3e39e74bc0d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZH5E2182950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9206ff3fd216124b4d22ee0304c04b5770a0c2f269c4632e9d148b4aa0dbed. 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/QZ5FN2339210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe243b997aef8de19fe8ac473bc44cb3ae6f9c23667ca9271edf0e4440f752db9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:13:23Z), 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/QZTRX2363570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a94c09c4b0ed789de662d26b8af9896b09f4e168776db8600677fa2bb0b69e. 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/QZWDE2360236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf04101b318461c765f5bdae912245982475652fe326e5bed879ce3febce636. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBRKQ2490143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda090561f40a8ddcd805037ea855d283d379e140c9fb09caa6a0990de0c5ff4b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES92548062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1847eae9f3a70c60c174fb84be6b09fc3a7b9030a1d2845a6f9ef301f3ef1bef. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZQAY2504462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a3d7df7c0a687fc19ee88c5d3595153266ee9048a9ea7aa1639265c1efff68. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZS7J2513143.