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 0x4e5fe025e12f7c5fe42fde5149a549131f0a6a5d448c1e8353181261bec36907. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/012849e2-db52-45a9-b7a4-566a2ca9b1e7.json and https://artists.proofprofile.net/proofs/artist/012849e2-db52-45a9-b7a4-566a2ca9b1e7.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 0xf5da1a92ca68698ee2ec38881a40562255b8af2aa1d91831e1008ab5d44a7ae8. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ZA94V2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cd79a3d8072e8f1dc7a996829911676625461d5a54dabe352a3416d7535a42. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ZAQ652400677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a546843ef040c53aa1a7b6e8862bcd1e320cd1ae7b1747cb28d9c423209c1c. 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/ZAQ652400678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2d50a7aa404d7937eee2d02b5169d1738173b494b5f2288d7432e833d767b7. 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/ZAQ652400679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33072221b1fbb34c91118c845273c937749167f8868a412bcedc1bd0fea69a8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ZAQ652400680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a53cf60614c4386b7dc0d1adc062ec0aabc5779a887ae3390b9bd736753179. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ZAQ652400681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3c7c1781438f794477a581df6234d073ea1fc900182ac8d757dcd51dd8f51a. 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/ZAQ652400682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0e8b13264c38e10aa1be76d26fca948a0734ee7b973983932c394354a9c378. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ZAVR42300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48969bb3a7e735a1a63a444df472ad7c92ec3d47fef8da6ca7e61a14ba657ad. 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/ZAA012200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ccfcde09ebac8ddc943f65ef18698e769fe47782648cb13f023977ed19a26d. 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/ZAA012200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe618e295af61ae8dab8e50454ad0cb9e0875cffbc802fd6436f54201cd1b7306. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/ZAA012200267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd45be29d24dd78f9999aa8ec939dece3cbf86dfbc4452d7d409a70b7962ab0c. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ZAA012200268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1223d7eef781d56d1463232656a318cf8c0c7760e4d0e1d220daae0943b27709. 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/ZAA012200269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1223d7eef781d56d1463232656a318cf8c0c7760e4d0e1d220daae0943b27709. 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/ZAA012200269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8f245db560954fc6c736c212c269c0b8c81f4fc1b9508929515fb51d89aedb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ZA94V2000008.
Jaiva (feat. F3 Dipapa, Lemaza & BoontleRSA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9161a1497c853ef2016b1c6196af1c52bc25617e1c22109649110642844cdef0. 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/ZAA012200248.
Gomora (feat. Lady Du, Tsiki XII, M.J., Nokwazi & F3 Dipapa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee5a3b93c303f3cad112dcc8915ab34764a735b86d21a53c647ec8669f12c6. 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/ZAA012200247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5599f17c8f56d79c63f8f95e078b5f1906d367e42fb7e57e92ceb4c5da8f72. 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/ZAA012300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee5a3b93c303f3cad112dcc8915ab34764a735b86d21a53c647ec8669f12c6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ZAA012200247.
Intsimbi Edlezinye (feat. M.J, F3 Dipapa & Toss)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c37567e0a658ed6803503b69228acd494e5937388a6df6bb84cbb9ca27de5d3. 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/ZAA012100234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61682bbebb02845228beb2dae946c676068dff71a0ebb9e5fe79defb27a40cdf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAC012300332.