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 0x346bf3fa7e526cdf858263b32746c795a86c98f23b3f2c08d11b8f55b93c5ce6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16707a45-9b55-4d4a-ae33-9719e6cdbb4a.json and https://artists.proofprofile.net/proofs/artist/16707a45-9b55-4d4a-ae33-9719e6cdbb4a.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 0x7bbe1f897f82235b088fcd25097463599f134a8d789f6135925feeeafab9a61a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNMX2162489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfecb076cc88cdae80aafa69de7048936edc0fdf4a1892b5ee57216fe2d05535. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/US4DG1100199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfecb076cc88cdae80aafa69de7048936edc0fdf4a1892b5ee57216fe2d05535. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:14Z), 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/US4DG1100199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4db8b5ead1aa644dab9b792dac52b36b545a37baedc172ae70d6c2c91a50a0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/IELOI2182263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759a54f9b3f970561e0fbb9701849f032630da0a05f0664180f667caa967f2ef. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:34:17Z), 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/UKXN22334874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96de54022a8779ceaa8691dd6f99167140d96f285525a0bdf16df21ef334ca2d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWQ2060393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacd55c49dbcfdfc9c843bc67500535bfcfb38ffa167b8223144b3658ee59ee3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZW9L2293368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfecb076cc88cdae80aafa69de7048936edc0fdf4a1892b5ee57216fe2d05535. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/US4DG1100199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfecb076cc88cdae80aafa69de7048936edc0fdf4a1892b5ee57216fe2d05535. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/US4DG1100199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe496824f40e9cfc13ebe3feef41eab27808060bb9862149090d692da1c075d1a. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZZ972317597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f6dbe4ecc58910ccedcc9884954c48dd7454287f78c506bec6579d528bd164. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZMEM2411063.