Barrio Ejército de los Andes, better known as Fuerte Apache, is a neighbourhood of Ciudadela near the city of Buenos Aires, Argentina. It is known for its high crime rates and prevalent drug use. Dev
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 0x32b7068efcd9828136bfc294526f832543716bb27c126a82ca465c6c99f8ff3d. 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/efbc602d-d4bc-43de-bade-d13eb76d8cd3.json and https://artists.proofprofile.net/proofs/artist/efbc602d-d4bc-43de-bade-d13eb76d8cd3.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 0xae62421f3cc4418339834f839e27a958ff728a4386ddb224842cbac37eb717c4. 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/ARF841900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65503ab0326058d78605f2d41d222412ee22f5db0ec070619ba086eaafa70380. 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/ARF840800624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8146f608e6eee338f07370737156d9ce2bd5a55e190a3c969f0c561374e0a210. 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/ARF840800625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c28c92f5e970c0fe461764969bf2a64d566e1f08283e27666b6eb0e1af6c15. 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/ARF840800626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67803e44183104f2897427837051ce796ab83f14b6dc201b550483d6b6bd1a3. 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/ARF840800627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571214466405e41452b9fcf3bdf3812265233b85c4e34bd91d938ff307657571. 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/ARF840800628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a59637dffa1e08fd547312eba3bcfed7b5aed0d3331135c8398df7f79658001. 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/ARF840800629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80b2197a16cbf3b9a4acc9997584976e60d79021d5314a4c9ccbe512d6c499f. 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/ARF840800630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e70f6304b4fd1fced921856a87e83e7a403dee3bcea3e8150ce14839fde24c. 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/ARF840800631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f0c6b4fd20da0533c8943608cdab0972283c438485d021ca77ea2e2ae55d74. 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/ARF840800632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878088e6b9505bf584d750a010755e2bdc938738a036892b3c3d77193d723071. 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/ARF840800633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ee3ff1f7df33df22708900f0f59787ea511482af683a38996a84347b47cdda. 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/ARF840800634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606df814cf8f0a08e2b63762149ecf8256345173d125508cce8ad5ba217cc0e8. 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/ARF840800635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7a9301ed20640e7fae72f2f3cc3a5790aab605941fd9545aec3e3e425036ae. 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/QZMZ92173931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09fbfcb0578997e74c5a04a4961f006cd7ba8575affb481003bd27a732cb164. 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/ARF841900015.