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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7173715d58441fedea2c2c84c79dced33927ee46b65c20dba2f000032338151. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efa3bb85-a36e-4d55-a71d-611f4e9655cf.json and https://artists.proofprofile.net/proofs/artist/efa3bb85-a36e-4d55-a71d-611f4e9655cf.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a5d24d207ca7775f1496de7c3fb09fb9b2beca2eadab3cd2d8ee48d9ae5cd8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTLA2490769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2886cfddcd41e0867e954a12c79488ddf50e6d6fdffc297dafa53370b326372. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:08:05Z), 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/QZQAY2488756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546e343837b8a76fd5baf8e555b5c45b2fb4d6eddcf2461ba13587fb3ed865ff. 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/QZTLA2490805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc57c195eca9316939419cc03097b16e333f8f8bba8662335086c85781706f8. 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/USL4Q2052062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b723fe99ce97a95e6c5c277a9ce24e71fd9eff2b6c7e3cbe48722c5f412df3b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USL4Q2052063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2886cfddcd41e0867e954a12c79488ddf50e6d6fdffc297dafa53370b326372. 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/QZQAY2488756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750c2e09088f42caf1932f7a563e3912091b6bedc94761bfc672119eecf3dbb5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS7J2303415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc72c1ae91ea41211708ff92a3425a7c8a8f7c1709076cabeb5cd4eb27a7a27. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGJ2210602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c134c10d0297e90803eddf58743c5faa3d06c7ed13e74860328cfe0190f0e6. 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/USHM92148398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe597ba3e3d226a775ff17e20707b807ef01617ea98007d55efa226b385463d5f. 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/QZTLA2504850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33f4f7f1f2b2ad5760eed133284f0c2b1372305706b3d2945256357e20fcca6. 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/QZQAY2525094.