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 0x4b12f1ad429c2b7b2012ba2ee011db09e5559d037d35d448eaa658ed15c3a591. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df7dde00-f1ab-41b0-8231-bbfdac88af3e.json and https://artists.proofprofile.net/proofs/artist/df7dde00-f1ab-41b0-8231-bbfdac88af3e.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 0x3ab722afaeae36e0450a3130dbec8488bcc965d3b167540fb8f52ee3e924fa34. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/DEQ022390564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4714799d2959df3686b7fdafc289db1cafe85366dd7cc44931debde834cb3107. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEQ022390566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfbf894f55c192b3bdef77053e45e2ca56ff754cfd41f4728b20b3752cf4203. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/DEQ022390567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd379580b76a8fc4cb44b729f761fb2d21753a9f4f1ac944cdbda198e63fe2546. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:41:59Z), 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/DEQ022390568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520bfe98f70bf87d7dc0123fd73780989ddc78416035a36877cd1f80bcbc4d6e. 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/DEQ022390569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb480f61a349afce29e9af122a71f67dd58a95a5075f7bd1cf19afe48ade8606. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEQ022390570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100e7e0a36dec71632ced9b2093b9cb4df4d231600d5c5569aa713d710a993bc. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEQ022390571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32f87d07b9a23393f1680659a61d1b57c1d5f6a9e83e179c86b42595a112484. 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/DEQ022390574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89069b61b38a80a1efa27b284ba112ec644fabf03183732521d02af88269036. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEQ022390575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2ca84095a556f091a2e43ef886219e7062ca9c61d2f6d6b47a223ddd867d09. 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/DEQ022390576.