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 0x9a2fdc9c9bcd3d8c7db6dcad2ef3b5db4ae414af0776da05491414e1301488ce. 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/5326afa0-e8dd-412a-bf90-472a7c35c4f9.json and https://artists.proofprofile.net/proofs/artist/5326afa0-e8dd-412a-bf90-472a7c35c4f9.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 0x850b6fb8b3ebb2972150aa4fd77cf7c030feb2b61d4b012c97602cfb0f6d5472. 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/QZMEN2031671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2782d8c99df7a98f63176e92a4c564703bde8701b84ade8b524747048491e41. 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/TCAHE2389412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e487d02984f1fb30c5f362ad2fb520d763d766c88564fa10e149e0b5ea80201. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR10S2441048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a61d279f2ba72ed4f7e18a270255c626a70df49737d11dfe8f1b31092906468. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:00:10Z), 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/FR96X2416759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafe8dc2138993f6d2f291e56bd4c4c01f74ed2afafbf80d2db0c08589087025. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX282491304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c0d16ed44baf4080b8fdbf1b9530f73a5d2943b5a67a9890c6aa0850adc592. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/INT132400676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3947f1980710fb915bcb8b2f6d4afe6fe4242f92febe8bb9d970496ac15c70d6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/INT132400677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7c5d879786850d460dc3f548f35f35f867fb94ad68170db44a0391a1b87998. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/INT132400675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fa968a6636ba9e1b5bc0eb152006f16eb5ed8d1daa8df53341f75e8f2cabfe. 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/DGA0T2416994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8cb0e4b09c65f97362e174b5b2a1aff7625192a18597b10fdde3c44df8364c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/FR2X42585531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6a41b2f3f2cafe0f9f27c9826e6a695236177709fd4330e15bc7a809e894a9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJX2501288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe79cb9d43381a637e5f713c57c76649bec74acafbfab729728ec38950c17f9. 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/QZHNC2404298.