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 0xfbbe5944f530e81a6d53b78f81b605adc6e68ded60e00a73806b028dcd3797c6. 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/70f5b127-c448-4779-b420-c160e6924837.json and https://artists.proofprofile.net/proofs/artist/70f5b127-c448-4779-b420-c160e6924837.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Los Dúo - Colección Completa (Vol. 1 + Vol. 2)
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 0x1fe3609996d23b53c8882d23a55b5e01621766e1d8dc42541528b49e3cddc4ba. 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/MXUM71401761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d2414e0ec11461a8cb783aed6786a5e4315c535e0311f6e286b85983477eca. 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/MXUM71701720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4481130dea3300721e01a5fc58d792bf521d4ac83605101059c9c35db5b48ea0. 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/MXUM71803200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d2414e0ec11461a8cb783aed6786a5e4315c535e0311f6e286b85983477eca. 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/MXUM71701720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e67d75236fd09b11226f71da620c713c8de69c6405d776a561162e5de48cc6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBPFW0700739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e05e0d5bb9698e2daf5f3ff2b19992c88030beb97eeb180fb66a9fd6bda6490. 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/MXD782004697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d357c05dc95d95db2c812f04ada1c6ca5205e624d2a753d429dfc465656e6b5. 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/QM4TW2352998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4295f8330b00a2484d35497f12d40ac521470862b6cc2a919a1d389b6f869416. 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/MXUM71500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b57ed01e8ef27c234ce0ddb40f977093d3c963c703d5dda60e211140c453ab. 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/MXUM71501960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae52f36d46b3486d5e54a334c04fcec91a77a8fb1586488a4bebb9506c68b09. 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/MXUM71502298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8f2b523771411de18d122f9ecc90ed6ef0bcb1f5248d68293463b45c9445ba. 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/MXUM71500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4e55ce3518a616bb1ec3c098aec00f642f03ae905215782708cbbbc28534c6. 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/MXUM71500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7d582bdc6001fa85cdf6aee57162a9c75dd178a28a72b4842f9a606832e8bc. 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/MXUM71500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704e23c0307a1c3a756a1b2ab0f626b1a8c6953494d10f1b445028686feec2ab. 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/MXUM71500049.
Lo Que No Fue No Será/Mientras Llueve/Y Para Qué - Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ce6f31141830744ad58afc54fe7f8c60814cc091d463fe39308223d6bb8cf5. 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/MXUM71500041.