thumb|Zion (1903), Ephraim Moses Lilien Zion (; ) is a placename in the Tanakh, often used as a synonym for Jerusalem as well as for the Land of Israel as a whole. The name is found in 2 Samuel (),
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2526c75071ac5a91fef7e968713ccbb403a23419aced428051d84cf7bb529956. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff8be9d9-499c-4f41-834e-778ce30f8267.json and https://artists.proofprofile.net/proofs/artist/ff8be9d9-499c-4f41-834e-778ce30f8267.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e1d3cb11e62f445c80dd793ced695742bf657d42b6f0b90fe4c43a770b2cf. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZEZS1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e640169f9df5b77bb622f36e239b7c5588f8b62fe5ca0f8e99ddb233ca05ea. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZEZS1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002ff17afe3dec01c7ddc7d6a3bd9b6a84d06dcd0ddefa6d06e290e73c9f18f9. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZEZS1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5774dbcd21e8119750e5c3fae4e57941dae551dcec54f1b3fb2b38499332f06. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZEZS1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83f1ef0013a86b19709484c82605f801081188fea9d5d4e06fa63812e3f0262. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZEZS1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef65c7e29c683cb3d229990135daa21e8186fd220b89dd88c9b2da25b5f1fe1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZEZS1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d1a6156a5eb873f6550661aa67a265ba88bb5a9cfa9c9c34933b6834afc72b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZEZS1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe79039dd55d7e632ba5fc5878ed510d0c7874ad4eda1943d81888df2273027. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZEZS1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716dc979580020f1bec10a92e6d817ec6a2403414cc54b840cca1216a9dc73d1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZEZS1800010.