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 0x6d1aad8e0fe9f4a101a123e67b4e2b1ca5c8d8f08a78d07caad2bcc9e5c52fb1. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2846fcd3-6a2a-445e-af6d-331f8891dca4.json and https://artists.proofprofile.net/proofs/artist/2846fcd3-6a2a-445e-af6d-331f8891dca4.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 0x8b8a6e590a718190992602a22b2bc83ef73cbf2bdab754b1c78fde8c5d5d38ab. 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/DEUJ62300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146b49f2dd91f121622ea80ad8a3f1dfbc738a62c0a202f67963e9e2ed459653. 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/DEUJ62300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6911c04e749308e1406d073a5cff5931a4a722cef3a7f4237fafc3787d0eeba. 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/DEUJ62300393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dec2abd2bee3643724b81593a642b074a0174a5317f7b6994294ff51499477f. 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/DEUJ62300394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6192285de265b059d142c8799d920e1c4f34e09453816aa3891a58d9f806ec55. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:58:20Z), 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/DEUJ62300395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e56773e560eafac096d89a59d7fab36b5157eb7a0a7dfde2b10af2fd9820392. 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/DEUJ62300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d6028acbf56a692fc218611dbe2a5a44c27991792af75c4b99f33c3937183d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:40:27Z), 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/DEUJ62300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6354b82838faa0e70dbe15ceb6bf12dbcbcff6a6558f3f646d075de5156a45. 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/DEUJ62300398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc872373d022b0a3f54a53950a3a71261027c62c15794c5026c5337c848122ce. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DEUJ62300390.
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 0xcf338764c780f4be11e784a65f12da712733f6b80df6cbba9f5ab098c603dd78. 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/ITN582002034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4150331feff32ebad64e1903676fe2f8905e9d0939865351e0f5b7c4e8b1d0f1. 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/ITN582002035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904cceb4a77387ef502f840e7d9c857c9417d51af0c9f15a7fe645ef7414d7fe. 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/ITN582002036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5162b71155616a1bcbfee2d53d9e0ae954efa2331ec4d7f605ce71c201db9f6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:26:08Z), 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/ITN582002039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2d14e28f8fd9f4d727ba5a030f459e75e1aa00cc5fde32cae6e30e233a76b4. 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/ITN582002042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d274d4ed161e0b4cc8c808dd9189c85c4dfe6b3cc3e70898b5ae67e4221f91. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:03:13Z), 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/ITN582002037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b5aac602a754de9874405449bedb53484e643b6d0ede1ff604016a58d61369. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:41Z), 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/ITN582002040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fa1d09d8e33c9b27d400a09ed1998ae1555daae14ca2340065723657e3580f. 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/ITN582002038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf606b3746a112ba913e2f9ea43ce75cc378dd0ac850e5a15634c8763a556ddf4. 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/ITN582002041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf795330a38e16f781769246da9906ab05a00887c8ee119e36a65ed827b6407db. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITN582002043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f905d88f3e1698017f85f134e73b17869421dbc316423cac1832afa4e95ea3. 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/USDY41919704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fefdd422bed1b5d53f19b0271ecdfbaa6c3f17748b1409b1f1eb25a459cfa7. 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/USDY41919705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a81b73038481bd72e89bc4f6e27bad342553f06a160120b842d4c3b0c11c70. 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/USDY41919706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4683c53d4355d643d06735092480faabfcc099342fc1e6a4a0a54ca3b7196ad. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USDY41919707.