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 0x01129446a84fda2423a97a74b7b7c0182a0168ba50a399848287f1203eb0e4a3. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14c7a840-17b8-4c11-ad50-fff8788555cb.json and https://artists.proofprofile.net/proofs/artist/14c7a840-17b8-4c11-ad50-fff8788555cb.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 0xbad86a6e78a3f5f00b31e3662a0ef457acf5e49a3027f60a793a12d56cb9c7b7. 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/USLZJ2417720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10534a80938fdf5988de2abace27b41bf9299819e80560aab89129432854df2a. 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/QZTAX2363445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac53d8fb289b22779c2ab3129f7d81ef48277929cd7335a84f3e6e8eb33b770f. 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/QZTAX2363447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7009b9ce57a499d001f28b4cf8d7eb2f7fa86696f2429ff25d7e73d15fd7a4b5. 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/QZTVM2319331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c2b858904e4f04a8bb362eddb5582bd8aa180c604f49cd48cf1dd594a2e2a0. 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/QZTVM2319332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8220a2b0aa5ce6d6310490fed98471dbc79202e3e9a413c9c184d7d61bd87d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTVM2319333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8587aebd914818bb281d375204b8b78c48671500b663e4416ac7831ecba73bb5. 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/QZTVM2319334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c64116c89203a2a130f9abb780750e924e4ca850fe7fd5b5c867b5f59af8f4. 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/QZTVM2319335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5650ef767587b51be1c56b2b1d3670f87c2c14beb7fa6bb95c8090588be427. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTVM2319336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6715ae3884257605fc22f975af5d279c49397b4d5a0d28dfe04d32c9ba611cdd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTVM2319340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6558d0b3991103450b3ab7eaca5e28970fb6bfe087ae28438940a23dae08f809. 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/QZ5AB2342466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0170b2ebd9b2bd0f02403a1fe01c0a76d0b6b489bb10c7cc09fa06aed1c13c2. 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/QZ5AB2342467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe789443dc01f63f5c8fec6b51c350966ccbb74a8a46d4e0610207b93b14d9db9. 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/QZ5AB2342468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427cd2e645e2ab3201714c403013bea4148be63148211f78e4b9186eddcaa4e9. 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/QZ5AB2342469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753191c1df9cce92cca4c85c40cbba55647053f14a1d53537bf1ce70627d322d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:35Z), 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/QZ5AB2342470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e270933ab5f6f75d9249f01164385a6236b70ad2cb753b5d9ede3cbe64e38a2. 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/QZ5AB2342471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e54a0f9e16b3dc3a6f15f03f0dd271072a1176a8291716c82c3b6c2f93793bd. 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/BKM4Y2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043c0b68e829e662f23231739af01c74c7a13a9f8ec569d88249715607a735de. 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/BCLYY2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5571c10a0169011ececcf61ffbaf5405c4aab374e7f611878d03804c40d2b1. 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/USLZJ2308332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86288f9dcc57caf33b72433bd084f62c3dd8d2e312bcb2b9a1150920842e3b9c. 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/GBRKQ2597209.