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 0xf1358df7193b12dd0687d5b9f80641a29425da4de6b7f5c68fe59ed50d0b2f3b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35841e9c-68e7-4a47-b739-d34c3d23adfc.json and https://artists.proofprofile.net/proofs/artist/35841e9c-68e7-4a47-b739-d34c3d23adfc.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 0x7a33880d550c0f4c6387cd392ba6f9c35fc7f85a9b6e516b1d02c1fd3ce85070. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYZ1995818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92f5d8d28ea778cf09c4f0768a029f427db38a348c7801afba253e84530b5eb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFYZ1995820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f0676d4dae320801f9fe5b2a2e8bf599f37d791f5052b76dc98aaf1a1617a7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAN112200585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0015dc424a9d8dbfb176eb143f5efffdfc4c145380f93d1046458cb3bfc56e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/CAN112200586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505865f9db7506c4b1ce4c4c3843245ca4d0d8eb64a21952a3e92e6c2991c7ed. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/CAN112200974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544def293b29fba1d02d1eda5d54b3fb9ff071489de88945a0af65c532aa86c5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/CAN112201121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6a3ac1e247ceda792d9307a6717f6f5d8fa1d7e0fce6e9fbb95458b05ffc5b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/CAN112201122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91e3dcbade6c223c4b7f7e392a000534b8d3edbf5779ee6cc25010d336d635f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/CAN112201119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce408276eac3f3ea096cdb45e1ad945469cd1b8f756e505b540c4a73b31694b7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CAN112201120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06235965baa43827c9c476b16315dc4348bec444410783b1dc1c9badb1e0cec0. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/CAN112401767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06742aa2d0b068f606338fbd77d811df6d5a1298e31a2e692b83e976fb8b157a. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/CAN112402327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06235965baa43827c9c476b16315dc4348bec444410783b1dc1c9badb1e0cec0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CAN112401767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742d26674f56ccd9508eb6f742b850cfad517241cacd6c518c40bdb6a758ce48. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/CAN112402027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06742aa2d0b068f606338fbd77d811df6d5a1298e31a2e692b83e976fb8b157a. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/CAN112402327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06235965baa43827c9c476b16315dc4348bec444410783b1dc1c9badb1e0cec0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAN112401767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742d26674f56ccd9508eb6f742b850cfad517241cacd6c518c40bdb6a758ce48. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CAN112402027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e0e903c042a38564375e3b94cb5fc268725e798e24993455a1b43ba3319d65. 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/CAN112402495.