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 0x85797a9c27b507d2c5499c119ac179307d04f47e6da96ccfe0b6ddcb6fc916f9. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d68684d4-9931-4ccc-a4a0-c357e6ae34c5.json and https://artists.proofprofile.net/proofs/artist/d68684d4-9931-4ccc-a4a0-c357e6ae34c5.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 0x8ce58be6bcb85511591def8a6b2703b120e31636ef468862249111b0e3de0175. 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/QZFZ41913436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c00ade3990b7f26b09d1b927b4627375c26ae30668455962dc9e516b1914cf. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHNC1933276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728e0b3ce2f09b6c6d7181fc775da9d6d6cafa5d13e4e8b8939748e2cc7aea58. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYX2022708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20b71087a606e65f8e8c2ff2d5510925d8c601c0174d67dab78c524c5d06f65. 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/QZFYY2180932.
Rabi Amram Ben Diwane (Ya Talein El Ouazzane)
Shiri Essa Behilulin (Rabi Yihya Assouline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc17a1dd5bb9ee7a691d6620d89a3971433819c886a79214e27ab0912fa2674d. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZDA42208499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa9ca5d02d7a3c42e73a64fe21b2db904d548a56fd4a6ddb753838483a7b19. 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/QZPLR2324871.
Talbo Rabi kbir (Rabbi David Ben Baroukh)
Hiloula in Toulal Rabi Itshak Abehssera - ההילולא בתולאל רבי יצחק אביחצירא
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af44bf91c10282ea9b6f28620796b1263b5b378445edf034377fa5c839e3850. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ62438260.
Itsik Chriqui (Rabeinou R' David Oumoche)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc942df18653389a07b4bd970fe67c30f5fb2e6e4dc267ef42fcb2017f01b7c0d. 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/QZZ762422997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036de9cdc85391c8c2716ea62e5d1889a4a8752d7b2f844dfe3747d396b9d49d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ7M2434333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42386d4932562ef854480c923bfb9b620b6934a97f5f1129cfcc880bf7b8576b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL5842555536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200762a4aea4d773cd7ea8e2285d10a2678a435db2e8f2da1ca9cbf2054508cd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US83Z2456971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5952aab087d0815b04a8640593c5ebed166c36179daa1f01d4329c3b1dde8f05. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US83Z2456972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c74b4b034149382ea0706e2aad6fb6c4712cf48eee1ad9e04b820518149e7b. 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/US83Z2456973.