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 0x38aa7febae52acdfd5666d166a2cb9c8c76d02f51ff49ab7ff91eebf4c4e3f81. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca8ccc73-576d-4938-9aca-3ef094485d8d.json and https://artists.proofprofile.net/proofs/artist/ca8ccc73-576d-4938-9aca-3ef094485d8d.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 0x432d3a1ae00c3869bb3fd85680b7484546d8da2667792f4ff9218ba3438227df. 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/ES71G2424139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f780eddac16f6e086bdd41873a8e23e2dbf2c195a0b8041fa51c3da91f985. 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/ES71G2424140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8e6b4348ec8d4886d34b8e2811e177801cf15aebc4a37c9915ab4a5a82488e. 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/ES71G2424141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857630a626b4aeb627d437afafc466c2560cd761bfbd821f9b4c174d1e49a389. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES71G2424142.
Introducción a la Naturaleza de los Palacios
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ea3ff98a8c8dd262b60a24c55de3c290b72333bad1f52369871a89de58a8f4. 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/ES71G2427347.
Los Vuelos y Las Estrellas (Apartado Primero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c8dc5ab17e3352a93f2482f4543f2d16d4e19c2dac587fff2ac3868015cdd9. 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/ES71G2427344.
La Marcha y Los Extraños (Apartado Segundo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c17f4f542cb5186f39dee6b0102c7d6d5261d65222acb87eba58a57e79b03a5. 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/ES71G2427346.
Los Lloros y Las Aclamaciones (Apartado Tercero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e16e773f3d46c88db87df7c66d287be89f3d441687cc0c7339a146e13efcd0c. 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/ES71G2427345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1072581ddc032f74df97e207bd3863cceb56efc6ba35acf9093a5fe95ebd5e0. 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/ES71G2427348.