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 0xe8fc3e6b1b80cc4574889811f1b12858e2ee1a074e3cd09adffdce42144e3c68. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2415ac8-0862-4a93-9b8b-e89d5e5f30fb.json and https://artists.proofprofile.net/proofs/artist/e2415ac8-0862-4a93-9b8b-e89d5e5f30fb.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 0x954e5e49d31514c130599a0116fb5a49b9b3c91634565cbdb04356e27d7dedb1. 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/US25X2400395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c99ee4d79d6bdfdfc2ffd18b0fbe2c2fdf9608e59e8e147a44689d511384b0f. 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/US25X2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21948d95eac4f8c15349c91cea7a62f22a11c93036a5d5b0043413a6435c2203. 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/US25X2302187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648f3aef81cd0bb15c25ef8559188953dd02683c443ca1e6b80e3ca92db8b61a. 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/US25X2301206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab5267f15c0e93d4e4ce1c28e56bd1d511ae89b25ce8697767af16e597c27b2. 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/US25X2103873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9987c9666c19abbfff6a26819befd61db4826b5603aeb469f6d5dd434a338c72. 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/US25X2101777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29c9caabe930aaf2fde7d687e677f94b365cf8fff0b43237a9cb3cb2b38bc40. 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/US25X2005078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401321a350de26115f1ec78fd94c8b231183dd76511a08ba541b16e6aeac6cf3. 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/US25X2005026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2858d4f8ef93596ee293f14984018ab3921263b20745a813ce7d6c5f3c523faf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBGLW2001051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e491217d51d09b01442a86aaaa030567ee2e3b43c540d9135ce9ca00789fb3d. 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/QZPEW2100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb3d50897d0aca806a2b7d45724a8138fc98126508bc5dde6e3353a0a747543. 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/QZPEW2100602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b972fe24e64d07d3c2e368c6a26458a173003488194b0f1a510872c96c85303. 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/QZPEW2100603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2b9d2faef7a32c1512aa2406552a930ae3f065b3d4487d69c1e05256215aa8. 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/QZPEW2100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79be91936eabe020dc418c999e62592b78b0ff5a455aa45d79b3776f9e0bbf0. 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/QZPEW2100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732e358da668df324ff2d9216f1b08dac62ff903f8e75c457c1bbc73e0993eb2. 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/QZPEW2100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481e533c50ee2c2f04ea3391b610a2dec1dfa53bd0b60c2b1ee0a58ea45393cf. 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/QZFZ22164201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a58cebbc5270f6fa5e2b8218ae36f772761844c99cb5ac06ee33696f0440ea. 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/QZFZ22164202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb1d4453bdbd1693c88acba3f4e88ab8ef9d0344a1bdd71d3da7356152da3cd. 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/QZFZ22164204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534cc49d24e9f03f33700ff08f79ab510656f722555381fa80693212520f01c5. 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/QZFZ22164205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd66a8ba987de4127b6f1d0a3799d4fe8d2deb0d1f882372b071abc2ef681f4. 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/QZFZ22164207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e75df36f92ac304a2856e4b2fb379cf93f5e5f95da81d38359c46c6ad6311ca. 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/QZFZ22164208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864e992765c4acb9d0b776c45dd767d04c51c2ad000422b1a864e2bfed975319. 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/QZFZ22164209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132e3926f12de40a53088885bc031fd633ce3d47846fbfe8792e465b6e0f26de. 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/QZFZ22164211.