Debt, AIDS, Trade, Africa (DATA) was a multinational non-governmental organization founded in January 2002 in London by U2's lead vocalist, Bono, with Bobby Shriver and activists from the Jubilee 2000
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 0x1896a8c4fac38c484eb079c7b2695cd2c3f15542a4312c725f6ce64ffcc4790d. 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/52a5a890-ed4b-463d-b51e-bb273832e509.json and https://artists.proofprofile.net/proofs/artist/52a5a890-ed4b-463d-b51e-bb273832e509.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 0x6a54ce508f30e1374a29153418dd481049e0190e793ec99777bc38268ddacaaa. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR3PA1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3050f39a50cdc13ae0e14e5e8f723a6d110e6c9c7b757adc3592a8680dcb0cff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR3PA1500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf683e7e408655a2be609c11362774439417018a9ff02db7151b31cf2dd72001. 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/FR3PA1500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d53ec2da83cd762fbde0705a52407538036e81e3a17c49a985d8d2d53817d7a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR3PA1500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b6525bfab2c4e294375c0df6fcd291b3c647de552ca82de5027090b5b03eb3. 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/FR3PA1500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecab07eb038444e743a131d1a3e9757e905935f9d80499bf142b59df2c186bb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR3PA1500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc5b4b41e780937069b7ced62d905073ff46323766ed4ddc4c01f69ce3eee1a. 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/FR47Q0808680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253b469fc72cda2d7bc851be3c7f5831213fc573ea92058088fe89560f890dfd. 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/FR47Q0808690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efa6eb894fc3848903f3a20a07431722585ea798b58611c03365645eae9dc9f. 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/FR47Q0808700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91b4b21348d061ee1cfae09bf5b1db0009f1cc3cbd7997744ba3aef9ae931eb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR47Q0808710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfac14dd7865ba12cbe55ed15331fa8e4bdfe0da28729fb095e849d822e26ae2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR47Q0808720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce80589b30d193ef7372acd6f3622e55274708de9116ce2688af800229c0fbda. 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/FR47Q0808730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8553868bb5d5389151065c7eeecb7bee187329c7bbd9f496c2aced0a161aa103. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR47Q0808740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae0a0d3347cb009055332b651d059b6f0023f9e74f0e8712bfa278de3119302. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FR47Q0808750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e6d2ec9ee91e20ab21a01dda4386b3d6dc950e06e2a80b894bccc1ec7a9b7d. 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/FR47Q0808760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef487b2f02a1e1f3c4cfbfbe36f4ac523371d5114c4ba2791b9ff99c7805574. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/FR47Q0808770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc7240b69226ccd279b98e5fee1df1c5940670736235cbfa1560bbdae0e1656. 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/FR47Q0808780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22de8390f829fed1c43d530c4616c5b7c09f165baf0c58376df9b40b48ddfbae. 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/FR9W12424312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5d4b2109103b247ead6b930595f0ec196a5c545cfef98ae9a6eb6981b4598e. 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/FR3PA1600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaade6ef065f30ce0c703d60e75a11dc6d087bb451666f1a0eb937957f04a7682. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FR3PA1600130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5d4b2109103b247ead6b930595f0ec196a5c545cfef98ae9a6eb6981b4598e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR3PA1600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eea464e4fe48c8ec58a322265cfc0806b82180c1ba10352ba1a725aba3ea59. 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/FR3PA1300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a516e4b4af2aff89000a083a4fc3dc1b12df464c8af459e029f7168dde8c4d. 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/FR3PA1300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e96bc1866efd39658c29216c76eb797629058ef3a94687c4f95a922f74c2e4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR3PA1300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec4b8a537b75802cee2487ec94c10641d59f92bac000762ddd9d9485ebf829e. 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/FR3PA1300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253b469fc72cda2d7bc851be3c7f5831213fc573ea92058088fe89560f890dfd. 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/FR47Q0808690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296a9f9566096d3a818037c88db4e3391d0a40133c7d9bb06ccc806026bf02a0. 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/FR47Q0902400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ac3d64061164c1872e94ac91acab2caba4817c3a8f56ac4ea58b2eb753c13f. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FR47Q0807700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fb9978e87c0acfc6193c26bf884425f8cb1cf55bcf735f84d5d6cbfcabc534. 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/FR47Q0807721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1279ce1313301315d5ba6d4d5a692468cbc55161e662ba91ead4d97e6dc3dd0a. 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/FR9W10700407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abcc5f8ba401678249cd742c4f7b33c2eda4b5253da4efd616f7c239bd06116. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/FR9W10700408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2f0076b76f4d449fb4921061895d58febd2809808b4eb9f68461f75b7adfb7. 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/FR9W10700409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64999274859622215a490dcf4c1c0cdcb527d4553e648464fd47c4f4dfd5c7e0. 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/FR9W10600947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb117d6aad89eeb9a4533b00203386c7101013ed11c6c70c001980f273660fd36. 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/FR9W10600948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a5e297349afc0ef529e483e2378f7f8006ac1ca48c1958b914dc4c178c4ec5. 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/FR9W10600949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ec9addfc74524a2e157e37b98a4b9f561e266be92bf76cb9e176910f880a19. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR9W10600950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66a89ae23ae605888a63fccded7a9c7839dda886ed995ceb8a74958fd8c9baa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR3PA1500010.