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 0xa4d84a252794fdbf5f966cfcf15b195ceedd5ee3d8eda189f680dcc0b777bf9f. 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/196e65b9-61a3-4454-8f85-c32b95107719.json and https://artists.proofprofile.net/proofs/artist/196e65b9-61a3-4454-8f85-c32b95107719.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 0x873ad18b230360c4aa249869a5e28ec385232af7eb84a254b656e38f6957445f. 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/ZAC012201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cddec27453c50568f8307fee78715a29a1aa241d904f45f958ccd2f9e247ff. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ZAHOG2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c954b35f1f9d3960301e7ebaeafe09a4ea09391e87d33fff9a2847878be64. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ZMO782200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40507da0305a8db2c92a8537707cf524b23defb5ee9d629ba111cb2aee067282. 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/ZA82Y2300037.
Gomora (feat. Lady Du, Tsiki XII, M.J., Nokwazi & F3 Dipapa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee5a3b93c303f3cad112dcc8915ab34764a735b86d21a53c647ec8669f12c6. 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/ZAA012200247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd67263efe7ff701a86bfbdfd51689ffed83ff675bb674b30b20ae925cc57d8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ZAW781300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7aa3deb7d1bccea161e04f9ff7c5e4ccafbfd53fa74bf69f1e9b9b618489bf. 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/US23A1534361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee5a3b93c303f3cad112dcc8915ab34764a735b86d21a53c647ec8669f12c6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ZAA012200247.
GUPTA (feat. Lady Du and Mellow and Sleazy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70eb0ae3ed4bf50ed467f5f12dcf4733bb574a4b5b7f9f2f22d7eedc74dd9049. 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/ZA56E2100634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed7573d5c86b53d7bcb9e83a8d5671324b83a9f64fe5b763c33b011f9c1e644. 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/US23A1512195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6511bc88fd9094c48fd69251bfa98cb1d9a94ec523d490bf46c252c6969f224. 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/US23A1512196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f67ea7379d915edab75ada1c1a93a10398634b4ca32111b606f58f5bb42917. 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/GBKPL2168492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f67ea7379d915edab75ada1c1a93a10398634b4ca32111b606f58f5bb42917. 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/GBKPL2168492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf842876fa49ed51db9bfa4b758d998733c78164e82fac227a1d7a438bcb3d754. 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/GBQGW2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873ad18b230360c4aa249869a5e28ec385232af7eb84a254b656e38f6957445f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ZAC012201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf04b2b79ffffb9c074e4116633715025c3df04c4d1f67b06b050e28ef7ffd7. 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/ZAUM72201904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40507da0305a8db2c92a8537707cf524b23defb5ee9d629ba111cb2aee067282. 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/ZA82Y2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40507da0305a8db2c92a8537707cf524b23defb5ee9d629ba111cb2aee067282. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZA82Y2300037.