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 0x925f86a09bff0644102430fec8d6ef9255f337c71956d04c24c80277254b4adb. 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/74d6f165-55d8-494b-942b-a5b1e9c0087f.json and https://artists.proofprofile.net/proofs/artist/74d6f165-55d8-494b-942b-a5b1e9c0087f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Not Quite There Yet (A Complicated Compilation)
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 0xbd72957ffe06cf09527d4f7035924515ddcf2e1dba6dedbc74a51d35421585c2. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:47:10Z), 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/QZTAY2209722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4995d148b163dee6ed26d5ed74ad0369f0f48d100694b2b131fd43ed5afb93. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZK6L2393472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a17681ace456ad7ec12feb292e98390b7176da4f1ad4925145d3d1466115bc4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:33:59Z), 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/QZRP42332899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978805ccb0518f3692f9227529eb931b3594a86f147b9661996ce923d5cbc8b7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFYX2432926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd53e766459543b98edd4b25e2629554e2cea842453b80000e56e52739c24aa. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ8A2418959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c2eac4db2ec3509aabf33673ec2195eabd6851e4f5d610330516bf3dbe7370. 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/QZWDE2448302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e98a8a38462afa07073db1e61455dcb2218bdd2ee829400491259ea4cd32999. 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/QZWDE2418271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d6759e14db0807541e613a4caeb9003cecf9f4548286dc4029289d7c2534d0. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZHN62481671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8abb25a749e9e20e975c9bb867d81e36397ed69378f19e38e3c0d1688be5d7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:30:47Z), 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/QZHNC2373385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00caa87a31ac2fe9a6c4fd761a5c64eeea35dfcb55ee74fde9bf2e7c80b91cba. 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/USLZJ2515778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b1e6565d89b94305b2ec09e4bfa7f88375b280074396bf3460d94757bd9577. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZTRX2532400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8b7f0764b4a6b7c63b0af857a2c1270a1953558f7be8805b123d501503fd2e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWV32597535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2668cd5ccadcec9960a162998853118dd7bc033a600ace92875726be3992c58d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZJRJ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf5bad1b78c9e734ca2ee5ea5e08c3b5ffa2b499f054876984202cd332dc7b6. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZTRX2353006.
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