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 0x18c8b77d7a709225ae21a78066a1ea4c9089e0388a1324b27384c0314ddfc686. 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/2ec37fc1-041d-4332-9ea0-eb0d3c7e3305.json and https://artists.proofprofile.net/proofs/artist/2ec37fc1-041d-4332-9ea0-eb0d3c7e3305.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 0x30175d1259e9fa643c429263af1e89f78b8eb83f42aee4139fa2dcfb25fc97cd. 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/FR10S1732360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ae5eb9dcc7279343025ca2c8a9e1a365cba48a7a123a1f9619b9824456639c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR10S1732361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf078f6b665f8a22207f4673eaee54d4caaf6218c1a44a4e32b5d318637b6811a. 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/FR10S1732362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0344339c54340f2cbfde7db962bbde77151e0d24cdef8285571f78615879eadf. 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/FR10S1732365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd1b0adef30cce97b304979cdd3a35c454e290f8f874137aaaa66540404cad3. 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/FR10S1732368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacc99ab617ca4efecb858d92f61692c4c116da83d71b4b5e2437ab3771d2b91. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR10S1732363.
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 0x3800a936327ad0c13af41d2786d7a34977f512cc271cab6b3316ac6925b5ca11. 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/FR10S1732364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01010ef5c402a69d2745a779b22836beea11ffb4af66be6be147866fcee82c7b. 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/FR10S1732366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe322b72ada875682f41d25e8bff51344a0666bd9e4db4418f9a813bcb8cddf. 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/FR10S1732367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77126c77c10bb6b76413dece9077f7b32e2d637e203285f279b570fe351a106. 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/QZYHM2416811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610c60de2354188f8b940ae5ad29738dee51685547a444f5c69abf7130b30e3e. 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/FRX202488686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beb4ca7ee744407512fbda786f453d697f09feec8e3ca9206c25d65b1429a0e. 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/SGUM72400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd98071e5ab2302809b194368ba313e0416dfd7a6a9cbbb2eed5b5f3ffc156e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX201987426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520f59ec577d32a9688e10c99dd6a93e50f6ebb8790e3ebf4b3c439fd433d9b0. 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/SGUM72301682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe96e87ec44b2ee67e6944d079a7dbdf08cc7e1a838461af5c74024d378247b7. 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/DGA0L2341272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4382655b5cc58578442f4e44a537aaddd654248a44fa08da4a60419cfd8f1e. 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/DGA052258350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec89ed04893fa4ae48309b278392cf5586969ae4f263ccdcc5ebba1118012ac. 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/FRX452130878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b2bc3b1a82f6139ae68bbea7275430f2555ad105a1d5b33f8bc6548482dc8d. 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/QM9SX2111903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8dfa5d8c2118c448a343f1d9ad8d98753b2c1186c8d5a9cae05611c8983e38. 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/VNA0M1907289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ee4b30ab92725631c30113025b038e2a62a5dd3e58b627b3095403e46ac320. 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/QM4TX2470016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86eb7b803e25e3fff78ce1579c3a00f4bc65d317e6fbb26b6e7dc87582b6309. 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/DGA072190133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6ea1766d7c028207287a1c267490068f49b9888ee11147b5407dff0b7904d6. 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/FR10S1987616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93165fbac4f034b8749043c466d1780e72ffc20de365c231302f0219f64a5f1a. 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/FR59R1835761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c90d86597bfe91a9491e1275123cf1452d3f64bfd9c3d5fcccd61860308e6dd. 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/FR59R1837149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e2a9556db4dbda4f6c39ab4bb0e6271a3bf32ffbd14d240c369a4586133113. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR59R1837150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dabacc10297960aecfcf72914b4d57bb4e43b7b2a7b3050ea940d434b08e4fc. 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/FR59R1837147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb52eccdc57df5a4e8e46c4121c08e1c402169bbed1c786125792d52e49a952. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX281900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60842370a2fd47bf123bbf4b6650505e166c025501e8b4035d9a074d415801c5. 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/FR10S1987614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cfd917283f86333211f828d1378e66e2717d9744ac5da41080fcd2f79a77e6. 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/QMDA72222198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c73cdeac78c9888414bd5707bd7ff7bb98d363b3f63a012ab1ace6bfcb329e9. 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/US38Y2422827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163d9bce44f02f78d261edc427979b3c5fd8a8ca562f365508bcdfc62995feae. 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/SGUM72000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ab4d652024e6f4b3e92934f1d5b882e005be01d5ab00d06ea8c96eb8ed2814. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR2X42483713.