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 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 0x451fbb931f53dbf1a3adaff460e9c271cd0349191098230e601dbee2d4f73f3e. 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/7cf73409-1c52-48c5-bd5f-c1e84acf10fd.json and https://artists.proofprofile.net/proofs/artist/7cf73409-1c52-48c5-bd5f-c1e84acf10fd.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 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 0x7bd72b3cd99c232abdb13f976244b248adeed1d26da311de304068bf69dceead. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFH2018851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543a1b068b906f4e23cb92a97a08d0e8d4d6dd895e04169bcb14ea2367351f80. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFM2117939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645c16b5f6024a225972c870b437bc1dea2b224f35337d564d3bdb0e162bacbc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRX762160602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11aee7609a41aecdb8c22be42cc7607e97962d9a9fbc7294b1c866ff51912d2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:12Z), 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/FRS182114059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4231e6fdb8a3e318d2f2eca49c3cb29a5289a034c04df462553b8f778dafe0ef. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:07Z), 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/FRS182114060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302bb9ff0f4aedf8b0ab7804bacbb4eb021e84da8963fcb7eb67f4e4acd19a97. 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/FRS182114061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc6c567272887dea25bede8ca195bbbecfb13cf84bd5bb66b95a57c45a19fa1. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FRS182114062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7972cec1b9899aaaf027e3161677c8379e7df6145fd74f5c96cc8857203dc607. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAGH2263014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86183ccb4ce8dfe929275898deae06dadb2be02b299ef9e366c65760ff44f109. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAGK2261541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb08b4990188ff300bf64531647e07862e4b4f9d64437d4e1ab376c5feb606be. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAGK2261559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5222050474590b9354ec438ae24e1287f3fe78fd247a12a73ff1a96babc7bd1. 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/TCAGK2261581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ac5c5fd68c62b40c7032e6808c3f17abfdd9a4ddf0af8aa44dc7cf690723a0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCAGK2261596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb1a28d70b31d7938977744ec81e77902e6f4bb31453484c1c0d02e603a7fec. 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/TCAGK2261639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9370d8d4e0547a357ccddffdb483bd9ac8fe7071d1eb93f1f3d5c73e9208d484. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGK2261675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7730b867c41678e96c2559df11de415c8dea28df83c35f08dcc1c98fd477a6fa. 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/TCAGY2307921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5a8d766fbb8eb88b13cf2bc65de9204d51e313c8c106ee2ed5f59d77b5032d. 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/TCAHA2371842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936d28f99f924d23988c37c353b9c438479a3a0594c50638561bbdc5af68a2dd. 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/TCAHG2350527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87426f2baf6d446fbcd38cd0026338f52664060eccb1149aebba180f4330621. 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/TCAHW2444261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4ab13acfa5984218c9196b43b41e46a792ab4679762e07c8f25b4dd6bfa787. 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/TCAHW2444308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c7c8eb881e2315081776fbd24568dd1752348cdd680a75b494cab2ec6fb547. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAIC2468214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c6e8e0ab9631e4dcf84eab1b8c7705d80c1c11574d0dde8700a82a1043185a. 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/TCAIS2409227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8279f30881852caf9934ba836861b440ec14779b8cc63024ddd15b60446fce16. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIT2409389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352b8d9b9faec7affeffd13807586cf25ebee288ddb2381f0f560ba79c835732. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIS2409298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22e381c8d3440ae0a3109a7c0f8850ac7d09e791ecebb177ba713c554df702b. 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/TCAIT2409337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb51998b7b6a0456e3daa3dfcb176a05765e2337ced12a5cc27b85b0bb33317a. 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/TCAIS2409364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0592c18dd41fdab94da0ad8e1c64c80536fdd740cf1c075f7aa371680a8e1d7a. 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/DEUM72309861.
FUBU (mit Yung Madara x Aisha Vibes x Jalil)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0592c18dd41fdab94da0ad8e1c64c80536fdd740cf1c075f7aa371680a8e1d7a. 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/DEUM72309861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36391906e2412c8194a3b03fbc48a5b3c9bf7809260369b4247e1b28ef74683. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DE1CZ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab859081ac61c73af1817e8f16cc0442e4515adec3b1e5441bef1425d8ef319. 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/USWB12203581.