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 0x40b774c0438d8c430683ac81da10618ae3a65efc8afc7d3ebf05e55b9a753a5e. 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/1d7708c2-fe3d-4869-814a-1375fea54ad3.json and https://artists.proofprofile.net/proofs/artist/1d7708c2-fe3d-4869-814a-1375fea54ad3.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 0xcfe4fde5fdd59fe16998689367e27ad99e98ea7acec13aca9f104c5842aa916c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USDY41702136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86034ad1650b56d75858c9b874a4bc953f87e231b1d89d4e21c7fc1f2061135. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USCGH1408939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70124d7922cca9a346236bb7080092a7b2394018165ef466cfb3e2ab247369a9. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USCGH1408941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a35284b60651d0513a0161a4526d1511d373e02cc962cd8c05f85ef2b97daa. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:03:22Z), 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/USCGH1408947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ed52a7d5359880f73f6412addc99d2d4b9d706bfc848e46fcc35f8cf3a40c6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/IL4191004284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61283d54f1c779d0da433d30519d071663b3f8c9a25df70ed7c9a26bc7e37130. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USDY41706237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c27842cab130f8dfa0a35b5b5034e436c9d4c688410e5af5a0a2ee45c47d3b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USDY41706238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bf2ea1905947aa249fe393f920079511d2cd708ef2d5c1c09e3b29e2531ddc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:19:45Z), 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/USDY41706239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffbd842fc7bd6e0423d8ae1e8e26dafaf7dbfbf25f27bbdc5119df9f0d2331e. 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/USDY41706244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa924be92d8985300c1ef5fb94018bdbbc28eb12c1d794c31498425910d20c05d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:50:01Z), 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/USDY41782688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23c23f3b11f91706a3466b77c4888fb8c14db3562020efd5914f222064bcd0d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USDY41782692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a756dbb1bea5fe2cfee00531aca2a2b2a0436cb7ea657657298bb4b1787ceed. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IL6191900381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666c066a5cc245516e195193deb657a90a412f3b764855784fd0c163a080192. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/IL6191900236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd4b331858452509d81b61016839ef9aaaca769b800f5bd6fadf44d778a5234. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:25:32Z), 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/IL6191900384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386b83a612c6e2eae57e37c3743de54c4b52461c2feff85670c4d46398b268f3. 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/IL5842131997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c1fe9553d2fa0854dad8b5b0a155936cfb9d393d58109ce4ff49073503c147. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/IL1042206011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba15bb2ce2b29be9a0e1aca6a515fbead26aad6e730ae726eca70fa52c5218. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:58:39Z), 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/IL1042403781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7967161746a5735c33ab9b3a3abac685e507dc23f36d077f8bba180e7459d2b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:29Z), 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/IL1042405481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de2b18c4aa3ffbbad2f84fe94657ab97b5806adbcdba39d0aea91317f8688cd. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/IL1042407451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb07f3b25f4232ffa112b6ec6b31a204380a2e6b1909913becfc182e59f63f2. 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/IL1012000454.
צמאה 1 - אמנים שרים את ניגוני הרבי מלובביץ׳
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47221730b0fa0a8e4277936525b0f108491f058d938f1ebc3ffbf7eb00370a90. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IL1011126877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb2fe1ff30624ed5f2c4716e0c0414ee8f5de9742beac8264a83f2ed546e8f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1011121659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0cfe0ae21a654cd8404de85c139a57dca0590a49dab425d054194b87d02489. 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/IL6001400142.