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 0x2f0b6307a59f3d53b0fa4fb5fa1f7e1a7f344fbf63a5049967094b0494923263. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b81d31e3-524f-4a39-9b06-80066534bebc.json and https://artists.proofprofile.net/proofs/artist/b81d31e3-524f-4a39-9b06-80066534bebc.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 0x14c0e8fc5ee591273a49972281f10f986663dc67829dbe332335906beb2bf8b2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN62314372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa56bb12efadc0669c187ef806b9eaca062959e65e355bac2e3c7bfae48e578c. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:07:04Z), 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/QZK6K2418497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4f08833736eaa3959a65eb60b48dc2f9acef946b5605fbcef0f6f649ca5851. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:20:20Z), 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/QZTB22456470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80c8de7b622b91688b9628098d737754dd66a7f907dd4c8f382c71ccf40d676. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTBD2495521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ea24dfd7bfab95802564157b2b623c925c403031018dc323e4a0a45026c0be. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFE2419455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cac0bfbc07f340a127cf5489cbb282394407ef47826821f33bcb34a96187cf4. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:30:58Z), 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/QZWFM2443058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9debc4f66e843294614579e5713e10d54ded1e5065efb830cb81298828e4d9. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:24:07Z), 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/QZWFT2468710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d5a1893f616b8f323b5028e4d15ae0b16f6ade6c958f3e023982154d0e0273. 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/QT3EY2401920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6729109ab6b47b6802f44aa2e0dede2c390e2c51b13f3a6c46a102678755e583. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3EY2401921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d36886f5d07bd8ae3697f65b13ff0f7ae6760a298c5d87179d765ece734d8c. 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/QT3EY2401922.