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 0x4cd394d2f85d4d2956b2d78b715bcc7a3e3a6fb09f1ba5e023bab94dda125d2f. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f09b3b13-36c8-4f92-856d-d616a010d3e6.json and https://artists.proofprofile.net/proofs/artist/f09b3b13-36c8-4f92-856d-d616a010d3e6.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 0x1ef657e20891f387cb99db987099a9d9fbbd439dfb1579b4cf51b2f1e3c34988. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/KRA341417467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca09c219915e7a7fad4161d6cb9f46b9773eac6159f2544b5b54bf88a79a2e8. 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/KRA341417468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35a7e7bb07b29451fb76a777b4ee5931984739d7ac864a80e1ccd9d3eea14a1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/KRA341417469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f899f1a6fb3984e3728cf63d4b1fa10e086bf148ca3be680e739a566b71b98. 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/KRA341417470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc55edd683cfd62d9d3c77ef846bdd1ddd4ee7989111cc99db8fd4ea406da16. 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/KRA341417471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225a72ae4ea41b14f775ff40c09501e2f6294663bcf5289cc12118a87ef8c43b. 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/KRA341417472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c74523049969d841f77ad51dc08b54820dbb0af99be96f49581c5d72718203c. 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/KRA341417473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ed2e953915404dc52da2cc787df28fab63d2e29ff09c78ae2e62148b399272. 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/KRA341417474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af37012469c4d8e6835749000ec38624086da4038a2f956baac1cb3a092d23c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/KRA341417475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40feedcb99142df7a20c3cbfe9647c720950643b90a35fc45286d47467057601. 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/KRA341417476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15516000fe14aa123d57c6aab435662884e506d0d58961edcdd09390084c375. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/KRA341417477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68276448a7f9b15d7a47875f2502e86dde3ad782ab078bfd11364f3c707de84. 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/KRA341417478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce3c8df16c9dc2a1ac05ea204c35eb6b8191903122f9e29bbf9ab46392bc416. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/KSA002300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1f7e82165d3570272811ad3939f48e426ac6497ae62c687a11d79acda2ddfd. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/KRMIM2209174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6f285f24e7054628fdb397e81a8bdb400abd165e472ea94671aa501b048c33. 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/KSB022500964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40737e576a65b961e66a16a0e074a4771950c37993fb5d0ef1c1aacd3543b7c. 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/KSB022500965.
To all the hiphop people (feat. JJK, Deepflow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f96720d18989a91f2fab827959faaebec9b98428696236e1539c5b889167283. 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/KSB022500966.
An industrial site (feat. Rohann, Verbal Jint)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024d166a1a1da56ab26510ce7b2a1777401e7ce5eb88dad7fc4be8b3f14f0b32. 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/KSB022500967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d33cbc17d3e9bcdc96ed149f9ad3acfe8753b450d1d3ba8237687b3ba92b315. 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/KSB022500968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b3080901e43b5d4f1c3c2a7c7ab3fd186c44f23978c992f262905cc6f0271c. 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/KSB022500969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a4971870a296e9164cb4a1e0251320ae5495a09a01a99a8697471c2f08ebd1. 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/KSB022500970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcd9f6e78c2a62e3f41713d0494dfe5f0c684490b1a00b0e6d8ad9b7dae18b4. 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/KSB022500971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad2125d0552e3bc790d711eead3a03e8e8ae02806a721ed91b44b182bfdbd44. 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/KRB471900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc1b4a37aa294d8d0b792b1b2c6d55c9dbd6df46353879880a1369fb4ed4b6b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/KRB471900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e747014576b1833894eb7185a4a18d70de4192a76233b1837750c0f23c8c4c6. 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/KRB471900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6907a1dc4c3f4677d4d467d97479b318eec5904871de35ab455240a1c6d01aee. 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/KSA002101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8ed2f595908c84ae4028c2579fab91d4635c350ea62312cc3ab4b15f226df8. 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/KSA002101092.
Crown On My Head (feat. Juvie Train, 9iceatilla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0b0e97502a0324ae2beb371c19826f5dd0a7c87f9d3648051cbfabf2f302b5. 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/KSA002101093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206182bb5eac02f39e7edd23a0f084581d9996f8a2b92b1b32d101ae845c4377. 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/KRA031209918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a747941a2ff2d1c3aac099d6ed5804baac111e4f5004b114da069f45b1c13a. 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/KSA012190515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24b6952af8c171c3df779ed1c2600ceafb7c048c3369d9796767f0bc2b11e44. 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/KSA002100791.