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 0xef287f61c6700786629178b0bd0ac51a084a358710d65595327dd8443f30c650. 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/9e6d503d-409f-43ac-8109-0955cf01f19f.json and https://artists.proofprofile.net/proofs/artist/9e6d503d-409f-43ac-8109-0955cf01f19f.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 0xf1d750f55ac9df9bb6e5d2aec4d7521841d6b8e244eebabbec74ce1b0a612d8f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:10Z), 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/QZK6M2102964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9ee99d293471d8be095a563ee91a24aa111cb4ad3c66f4d5e2eedcde51608f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:27Z), 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/QZK6N2129641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16867c2421c6e84cf9501d7258cc2063fa4d3d60580802f2bdf5245c7c2104b6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6N2129642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d742c340f0240b35087ac9a70c934cba980437ef3d8eb029dbf7c7040fdf6f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6N2129643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3349550fdf310032c7d1f8aab379f71bbebff8c0b104886b3303bcd14528171. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMFMF1569144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027239711d191430c0338b5a03a9b49c29aeb02febed66858b000a40d9b3ed99. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA61897395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ff400b6742f1c29513cbf65d2a1a2a8240b45b64fc47ce494d718322b850ea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6N21961064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b88e9de0a938821bf9be5e78cd3de368c9ce86cc3615f9ba822de7e3ec75557. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:26:12Z), 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/QM6N21961065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0c145030708d2146ccf7f1f0420ce9114b7fb69b04e4eb59d1044bfa35f044. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QMBZ92387052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2025f18e5f9d57857c60759835e2bad22076dc0673df21f3ebdfe9e3f38ec9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMBZ92387054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cf6973f214a8c883d67e83b5a32013592500b8723b67db7f859d842a819c55. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEYOK2203974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7d7da48ccedfee04a6f17080d37b1203f605af3b8a114b0baff264e7cb9d40. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEYOK2203975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416e0df4f8245e30c5890b6aa546bcc1ccf1d87bebd56e68e383ebc43dae6e39. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/SEYOK2203973.
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