1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xbb0bf225219cc8741ad9f564203bfc3958d108650dee9f3192e360d2fe8c10f3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ae5bc84-bfb4-42df-a81c-9e425297fb43.json and https://artists.proofprofile.net/proofs/artist/1ae5bc84-bfb4-42df-a81c-9e425297fb43.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 → block OTSBitcoinBlock must exist at that height 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 0xb8a954606ae2fb3fafca2d72421468fd3fccb0dbe6089e30d2e8542ace4ee634. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA82181504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3045864c05561db291dda78e33577a391f02bfbea452d75570602b3ea6bede. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA82181505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087097f04833e732a4422dfbd538f83ce9e10bfa8a01bcbef9018b3391c6b194. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6H2173317.
Chabad tunes for babies - רצף של ניגוני חב״ד לתינוקות
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c64642cf5eb011bd266f42907eaa40e35699f94103189f84369bec6acbbbf6. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZMER2164533.
Chabad tunes for babies - ניגוני חב״ד לתינוקות
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d8132de632f21e8cde8cba149ed607c9dfe85f24381ee5f7d3ae996612b1df. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:49:33Z), 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/QZMER2164534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0a5a6a93de53f10a58d1b2aab425b10e1272500f38a4b3decdaa0940a0a757. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNWS2177694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b88488894d902ab69afd5d40ebcbd7020562c77c0efd30dd7315a0d70fe15b8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWS2177695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a72a17d559e783237a93d3d03b15301886b4a2ebb19086aeda0297a5426e81. 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/QZNWS2177696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed10a7347c6720658762174bcc9174dd09fe023deb7183179f2848936989ef43. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZRP52118054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c55fdfc7850614fee823491c7136060e897be8cf5b1b8cc75a6ab2dabbc06. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN42261984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353a3b8536c965a77ac6ff89a06488b2ba62fe7c322236891c761f77ba16ec4a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN42261985.
ניגון ׳כי אנו עמך׳ / יוסף יצחק בן אפרים - ביצוע מקפיץ!
מענדי בן אפרים & יוסף יצחק בן אפרים - ניגון חב"ד הגלה נא
ניגון שמחה / יוסף יצחק בן אפרים - ביצוע מקפיץ!
מחרוזת נעימות ניגוני חב״ד - יוסף יצחק בן אפרים
כי הנה כחומר - שמואל בטש & יוספי בן אפרים
ניגון ראש חודש כסלו - יוסף יצחק בן אפרים
ניגון אימתי קאתי מר - יוסף יצחק בן אפרים
ניגון וכל קרני רשעים - יוסף יצחק בן אפרים
ניגון שמחה מניקולייב - יוסף יצחק בן אפרים
ניגון לחסידי הצמח צדק - יוסף יצחק בן אפרים
ניגון והריקותי לכם ברכה - יוסף יצחק בן אפרים
יוספי בן אפרים / Nigun Shemil / ניגון שאמיל
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493ddaef5a5a49073b7dfe39f720efac82e26e0cba3cde0eb10d1018168414f7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZRP52419030.