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 0x32fe674214b48317f169203c19eb71a137aaf90e160febc8da207cb3655ab2eb. 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/a226eb43-99e4-4645-9193-5a66e9edc4ad.json and https://artists.proofprofile.net/proofs/artist/a226eb43-99e4-4645-9193-5a66e9edc4ad.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 0x6317876ca0abe47e9d58026668c86319417e60b6d0e09ae7adcd9524a473b85c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GX53U2076181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32fad0f0678ce6b4b28a6f7e2c9ba9471fa534827d41b3365a36dd1e7d13447. 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/GX53U2076183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba368b03202940cb622b2c831b543010746838061c8b291c1d2ed0596377158. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX53U2076179.
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 0x39ec48453c751047dc6b248d694df39ec58f34bfeb3ea8d20be596aca2d9d893. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GX53U2076180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4243979c5e6580830d5c923f28fd81ab4ce99e0f38e5dba48dedf3ad5983f9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GX53U2076182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9614c15917c8abcf4044d6a54ef4bb0e6399bdde0daac5dc729c80d01b2e196. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GX53U2076194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df86cb86838a7d55547540e6fd3c6f36fa0cf62210fe2833aff87fb5e2f2b8f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GX53U2076190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1ee103b502dc8431ecf8e8f7c134605b9509140912ff9d270f3caa42d70c13. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:52:19Z), 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/GBLFP1598869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef14572d90fd53194c43a6c97fd86350448e1b4c1a81bc3cac128af096f3b8e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:05:00Z), 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/GBLFP1598873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaa02cd2d9882eedd75ab155566f1d090e3e4acb9e0001d69744c6c87789306. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/GBLFP1598568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f528d3b05481c96dbda184becb3e916f79aef712c9df2378db792c7ea12ccca. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBLFP1647355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3491e051bcd4757f31d3abc14f39bfd4ab7e56885e374494f347afa68cd15f69. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/GBUM71701951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf92b0747f861c87ad2f34ab155d48e5b93d1876e81cfaa77d56488d7014286. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBUM71701949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793b6680235603cab8719b82ab7349353796b55e02300a07f5dd29eed4634519. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:09:49Z), 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/GBUM71701952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71e32567e91cbfb47678915e39c5bc1d9548cba78a2d51e5dd4bacc734e665e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBUM71506670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5fb2f52f35be6f48d9f2c89adc8dc9e0c5bf56aeca195c727bc0835d122664. 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/GB2DY1800904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd05944215376800ca38e0d525df44686d5c5c040bf8b5cfd6604deb908e197. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GB2DY1900249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab5b39e0dac10e160908aa3cb580785a5eacd931bb223087405b9df0af323ef. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GB2DY2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b43b676b0e4b2d221b9cc70c4fd012d1a5acbbef35ab6b888fc768c13add9d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GX53U2037105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b43b676b0e4b2d221b9cc70c4fd012d1a5acbbef35ab6b888fc768c13add9d. 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/GX53U2037105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd1eaee085903d45fb29dec747be4188b996f56a711404ae517709ed94fd48b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBLFP2303484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149cdea300d6591ed98f5e70e4c62dbf372d69dae86c9d66ef1bee7ba59c123e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:56:51Z), 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/GBLFP2350339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8829125298d00be53209ff94ee0b7a0de1eeec906af1a1327ee6ccbc9a9b3a6e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLFP2395583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa576035b035319dda831d7f028147e074ae61f0de6134fa8f14ca5b7a65a738a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:19:44Z), 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/UKXN22391339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631c876a5a765961a08edd7029cbfb99f264ddbf1c1f422c19b4ab13c16bffe2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKXN22391755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2c2847ec81f12de3a9420cddb7b6ec2838e1f5f95309781997b805969277b9. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/GX53U2402352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7437877a041033f51bdc04bfbc2420a2a0490d52605ec185e6464203b19141b7. 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/GBUM71804824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027a704a4f7a86eb0781e10dbb020cc689bda1f5c882a61785d76a4845c35798. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GB23J1200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a8d98d0694578a05150856f4206131e0648285eb0b619a2ed2f91988a5d022. 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/GBLFP1875317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b520eac06b1ed632ca6a25a0522bff8bbe745c6d72ad782352ddf2bf4cceae. 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/GBES21200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8693e2cd703309bbe40e2fcc2a0abff9e6a1e55096f5e7b5e837150fda85fa1e. 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/QM4TW1928086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4933725bc6365ac869e279a776871bb283f3a09a94b2bb1dde02056b77faa70. 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/GBY711200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265477b073f751b89981ed2c04cd6fa22c51e8e5526b1c6ba3fc2094ec6a05c2. 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/GBY711200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af0ec08b8f755f265a798ea83d8956ca9bc5ae99a169279ef640f838ece3d5a. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QM4TX1926060.