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 0x999fbf9c9104beb4b8d3044f582c6ed2ab2c38ae89f0c77a453b35dbfd3afa21. 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/4e4e8c70-61cc-450e-b7c4-efec7b6e4e46.json and https://artists.proofprofile.net/proofs/artist/4e4e8c70-61cc-450e-b7c4-efec7b6e4e46.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 0xf67dceb4eec5f0fe17fb3033275f83c2828449f0d7a2d85bf3fa0cfea0eb8dee. 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/FRX762216778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4723874bcd3f02cec2a43dd47ac2b2c264f496e85e54e437553147609fdbdc1. 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/FRX762216782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae644ea28256896fe7418b9a5c7d2e07e1fc97732924165965796b02de50920. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRX452276537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eea79ccae0a789ef2245af0093fbfd9b40167cc3e05f323003b3b03c41c397. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FRX762216785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91af400f315a1a72b62db5ee43acf9ae005ba1390db6baf8d08351a0b142c241. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FRX762216777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c9393d6044bd0a472c1869af4b47936ed004b1556bf20578921246744e4849. 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/FRX762216779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96c27e7406850459a9197db7f2789bb5653ffde3c358e2cc8a600117896b1d3. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FRX762216780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa87ba729f1950772f35847fb594a7a0eff9b8cf6c445903b77504d639f7705e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRX762216781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c89101c613148c2a008a2045280d66fcf288f56db0bf036166093dc583dfa7b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRX762216783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331deea029b890b2f3f05e936ad3249be0633989a7863f7ed5f8cb519467b895. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX762216784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff881f2b532d32487a0e6c2d9050e696fb1e3decb0b3a1b65ea71833a4f187. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJX2442259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a0b67c9dec013474888048f41dc8c8d4e4c747923e849638b4baec7c743be6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTVM2397057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a02fc93f8601c9c133749c2860d0da43b4672698aa5bea2a57b24e5fd24620d. 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/QZTVM2365673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5eb893013c3517b7ae5e0b3b5be82ccb44fe3875caa31068bb814e1814d25c. 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/QZNJX2397721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae644ea28256896fe7418b9a5c7d2e07e1fc97732924165965796b02de50920. 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/FRX452276537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e7f87972fba6181b85a6c8f54ebd45e82a918562110ce88b8696594dd1c7c3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/THW092104674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5066a8a9143318a9497902e92e609825fca381eccc77caf1e75aad96a3788aa7. 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/THW092101934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092133c7795688e285af8bb721a0e1a15ac17f29858524eeb62597e0e986958e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/THW092002087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee165aca360c226285e84e7384fc5328cf28e59dfca77deb3a526d3d93797bf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMER2052793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f5c86d6b6a8bc14a6d406f1cf3e4a29c558ab569864290b342333ac4985347. 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/QZHN41952067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc0779c3ac4785fdb66aeebd3e1b9e166204ec3b3d38f3b47db397d88fb530a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN41952068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa672e9fe201332f2409984ee9c7c2e4099268df8037760dfdb341dac8095ac83. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN41952071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f02096835249ef5b6629b75d4d570dcf62fc57d2cef99cbf0416902fa1e8eec. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZHN41952069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d8f247ce36ec9c0cf98d57fb564460dbf3f0cde75257ea077d7f138ec96afc. 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/QZHN41952070.