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 0x343c05eefe327f8b5d99ff6a52fefc828cc59679e4ea97c778b6d182dd32a5d8. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29fcc7ef-6535-49e6-b506-330e43a496cf.json and https://artists.proofprofile.net/proofs/artist/29fcc7ef-6535-49e6-b506-330e43a496cf.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 0x81c4c9c8e2ea092dca4431b03ea57c3ab7ffd96149383e92f066f48cc14b53bf. 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/QZS642336914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040975945d46823725d01fccb3215175ef2aaee5dcd2bd69b02877e932bf3b4f. 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/QZMHN2314316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea346e2c46364623b72edbf0ea6277f0b18bb79ae39d44911423c83d1f0fb8b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZS652308372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f640b9c6c0f45a559644bc0977c70e6414d8c36a34508b55058586a139d5da. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZS652370243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715cac7a5788c95b7353c68895475baaf11e7113ded7c961047848aca8713ddc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:30:19Z), 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/QZS642345335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8a310454ebf886d4db4fd1a3268f477266350ac080de652a34cccb463da005. 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/QZMHL2306752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b5c2b9ea91eedc6015b97ffd67623087ce89c6c366241bdd102fa735601b9a. 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/QZMHN2383196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2063bb439f7365d769c36717b1a10b5bcea9dea67e6cddeb9fc6f1b1d1cfc1c2. 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/QZMHM2326514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2c95beafdc0c1fc2c55c9a0bf305196c93dbfc09dc66705ef529b813821814. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZS652355294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7732dd5c5062569a5dc4e3f407def2bb5d0a25d9865780fcf2f078ba58b5a40. 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/QZS632331919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb6438a7cfbf809d26c5e31a2f998eb52f702c49621970959f537b1739becb3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMHP2368299.