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 0x3d7a479cd06ebaf0bc81026331413267a0b9efdb26c6364a050b90d00ae0ffce. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16c68022-1d1e-4a32-b8d0-b43c09945f10.json and https://artists.proofprofile.net/proofs/artist/16c68022-1d1e-4a32-b8d0-b43c09945f10.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 0xefc790278ca967bce24b505367acd0b9ad4510190deac6eae5ee0c02e4bf73f7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARG991006477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2914f5342297e25fec95bc344f4df6e988af9b1cee18a835173244d2191619bb. 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/ARG991006478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29229e6ffa3d6e397c18414a317a503d8ec623217e1eeb43192782daa6afae2e. 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/ARG991006479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1a8da1216c7c34cb563a847f0c68aacb4b7ab33b5bf0ce2f6d96ac075b65d7. 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/ARG991006480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93231d0d4d41a9d548ce13d85e1d7d35af859ba89c6f90b7e3a90a5fdfda450. 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/ARG991006481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19eb5b08aeae3977fc2a3da2dd6f819f846f0dc9fa195a59f624986d4a552eee. 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/ARG991006482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530bd65e04bac99a025afdad8489ba5845846018058da9f361b939eef722ebf1. 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/ARG991006483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee0f0847ffd5c133e8e563db76e8f1a9e159a33b7b3ce7e277b6d855f25a273. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ARG991006484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d732dc60d9c5db4838ae06ef72dce8c8bd624741f60683daa0343e7b320761. 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/ARG991006486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f587711fb69c2df4f1c05722083c5484cb3b88f8bac7ccd882f44aec3ed9d3c. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/ARG991006487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afdea8167057c2522ba11a8a92aec23a7851603925318dbcf52ae8e0da3694b. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ARG991045818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e9c44f41f4e4937a1bdf0ef072b3d93ad0909b85fb6a4a14c5c9cb5e6b5175. 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/ARG991045822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6161af6654d6f07c25723e14f3e7bf56fca105884ff6b009c2deab1664e3d07e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ARG991045826.
Tangos enregistrés en Argentine (Mono Version)