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 0xe3b64057a468c8a1ba74b95beb8e30f5e01d58d76c15350c65ac88b279317fbb. 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/eb556743-db58-4ea2-808c-1550e86351a9.json and https://artists.proofprofile.net/proofs/artist/eb556743-db58-4ea2-808c-1550e86351a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nigunim of the Alter Rebbe | ניגוני אדמו״ר הזקן
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 0xe85e3d58971016004627e0295d9d73d71373435126b1c7b972e4372b25b0791d. 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/QZWFK2310295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e368eb4c144f0add66fd41bd8ee28b34d262d05a8db5c1ef185c38a2492377. 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/QZWFK2310296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444239639d63329f99d1ad34a833ab08da740726424c5b809e1782e01e2a01cb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZWFK2310297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e8a455a5db0d18a03f6cda6ffdba2f8685684a71e00cbbf9fe12f50d4b394e. 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/QZWFK2310299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da20072abdba2303d1ba8da24f06bd377fd0ef27cce35691edc592fe1dae28. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZWFK2310300.
Dveikus L’tfilos Shabbos | דביקות לתפילות שבת
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f6a46342346512391a1dc439254e79d7184de363b3332e62315a177fc64228. 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/QZWFK2310302.
Dveikus L’tfilos Rosh Hashanah | דביקות לתפילות ר״ה
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5a8b00568f1f850a7dd16c89e091160607968dfc8ba7c9939f6d9d041809ec. 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/QZWFK2310303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21f6ae6755e8ef29c63ce3058f5804e1eeaafa17f7fa601742be35ef7fa9190. 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/QZWFK2310305.