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 0x9d126e5c36d3489744551d8e0f608b6f8c5a98e9c38a141571a55cbddfade073. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7522408e-7f01-4c37-9db8-3a9e917098bc.json and https://artists.proofprofile.net/proofs/artist/7522408e-7f01-4c37-9db8-3a9e917098bc.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 0x92cbfe643e326b904c0c888137b4601cc0e6ad4f2b9aceeba767231fad1909b5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGH81900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727143cee62ed74f292bb0ab3e280ddf891ef1016b3a8553148b501423c96d59. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZGH81900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc051df2a7695f7cdd6c0242f28c50e91180cac7c3cbec1072bc1036dafc70642. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZGH81900214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85f31102903207a6cf649499f38f2239fbfe90359cae121367c8ff9e2420ee2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGH81900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728ea39a92ba9870dcc6277f639605e065bbe276c91a4be0699476ede580d59f. 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/QZGH81900216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193b59e07506b9de5a6741ddc4741a8fd717feca917b7e8efe44dac08ebee309. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGH81900218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdd54b5cbff896c6dcafea1adddd1c54f4217598e55030ad9745377e4e7309d. 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/QZGH81900221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31bbfd15cfb88b8145c570404965d9c6390a9e0f60efbb7ea16da7be7f61217. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZGH81900224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83730fa98471bced4d9386f0db967d4b6ea473660ee483a1f8d68bfbec980a7b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZGH81900210.
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 0x0d930b4a6d5fb9372be22fcb5ca8e31ff2757d74c018caafbe02e75274d83e8f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZGH81900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989344b9903b7f838df4d51968aa0a1d57b4d42d0fd037ecc178eda7c56cc741. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZGH81900217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5559a458b6c499d17e0bc7b24adca3014b404944073b0934b7d5d0a04755f7. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZGH81900219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c270e7a9815b4284daa6f0ab4ebeb8487284d3c26d31f4d6ac43db8d4a33f0. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZGH81900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc8ff1af5bc453439e79f15575bc8b72f44d0ad5650b5dcde62ab273a6bec41. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZGH81900222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf91227b4e47231bb2c43db6fea35e4ca3aa26a69ba1745d1433597b7360026. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZGH81900223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc11bdf498d4063beb8395c7147be2477538a5e6dae1e51250a585f7d08ca441. 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/QZGH81900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177475d622a4f97192445931d31d687ff213a222527d1bfaf766822c405e44be. 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/QZGH81900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9877b217669718c9e67b6ebbaf7c8dcd73f0030c424ae3ca14f5fb67fd8641. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZGH81900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419014212966c4bd13571d7add7e56f8abff06227793b744fe716d34df536349. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZGH81900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf591f69c9298ec5e31c302e4c7d0a0c83138d6a2ccf9a69c2b1ad4ceedf613. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZGH81900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dedc7aef11bf069baa58dbc7f403eed2eda3fd6d76ce53453975f18f5d5a0d. 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/QZGH81900227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e0a0c431396d80b9194d468e8152fa6945ced74b230ce9580eb3a92f5b2f02. 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/QZGH81900230.