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 0x74f8eb42f8b036b1a57ef6cbd91ac13c0ddaf30415d9c3933dc8f9d9badbd0dc. 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/25b2f7d7-643b-40c4-8250-af6bed0845ba.json and https://artists.proofprofile.net/proofs/artist/25b2f7d7-643b-40c4-8250-af6bed0845ba.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 0x450b20d5bd933fa7c2a9a92d47ee00bbe66731ab863fa3fd8fd7644f53670d39. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:15:50Z), 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/ES5299100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf464e583e8166ffa9e3900a2a3ab921e6bcc2b98bda8eae691e9fb782d5a188. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ES5299100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bbcd026d8928c92b70b08e502cc7050c532e3099a81867bb423029ff44ab36. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES7580501690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1f2b763c1a735a7782d561ed79621296e1eb5017b0601d9eb3bb1037a83d84. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES7580501691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8c1edda5bf41aa0b56b9e6b05a9131a0cd3354b6aa4f7d84eb0b1f99d6e0fd. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES5299100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdac5e42dc3d7ca758825cf4fb4afee23baead28cbe6e5751976c2ae08eac758. 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/ES5299400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bbcd026d8928c92b70b08e502cc7050c532e3099a81867bb423029ff44ab36. 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/ES7580501690.
Viejitas Pero Bonitas (Baladas Románticas de los 60 y 70)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8c1edda5bf41aa0b56b9e6b05a9131a0cd3354b6aa4f7d84eb0b1f99d6e0fd. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ES5299100041.