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 0xbe235b8eaeb8d21c6fe0233ebe3dbfea46188ebc01608cffa062a8219329946b. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1f06c9d-4093-4b39-9e18-d10cb94a24b9.json and https://artists.proofprofile.net/proofs/artist/f1f06c9d-4093-4b39-9e18-d10cb94a24b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dices... (Sones y Canciones de Guerrero)
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 0x29979cc9094d7bb51c30aa313071499a459bb4b33ce75d6326d1f7e73172543a. 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/MXF601900086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ab3d4c03c1546b40d73c292533b25cfbc0c7e5406c98df3c156a277de25e6. 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/MXF601900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65391c0ba79bd9e9a888c2a2920bc70d561022a90c3e7d0e69f0271cebde012. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXF601900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96e00eab50eff39c039f4929290087c9a271686fa138904ab1e0e5dec465953. 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/MXF601900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3670e4a22172c7997a41f1a19ddb0fda1ce2932e1dbd046ab840bae549ec35f. 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/MXF601900092.
Atolito Con el Dedo (Chilena) (Costa Chica)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854465f7f1eeb5f2669e6bb0fc5a8200e690b8adea0c7b7f38a6e352e8d80feb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/MXF601900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae12351ff2ddfbe78d380eb1e1f669dfc2eb07930ed45d62a93a236bd86bf05c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/MXF601900095.
Ecos del Sur - 30 Aniversario (Música Tradicional de Guerrero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b84ead9695ba006fd25621dcd94c2edc4291b073f6187bc2280c957977979c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/MXF601900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea4adc25d4267ed15d8b9797538a556da67e6ac781e296605515ed421f4a084. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/MXF601900101.