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 0xe6f3ead033351d474239b3c504acba463c7cb684e4f7efd8626e2d60cf5c62a0. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46a6b562-a679-47a3-9874-3eb3bcd37010.json and https://artists.proofprofile.net/proofs/artist/46a6b562-a679-47a3-9874-3eb3bcd37010.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Música Ambiental Guitarra Española en Pop (Volumen 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 0x840d3d12cdd4032c88373314fb933072d5fe7c43236bd22f4a009aa294a58ad1. 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/ES5530701181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497ce6dee218c6abef7480c6fb846d3b3c36e28438762b11030f27c7e74cd7dd. 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/ES5530701176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68009a96ae34f0ca8b69895d2e62a286f3473e49f965b4540bd516dad0ecce7. 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/ES5530500199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea3563287d868df46817792ddd7acf8027187d156e7526405fff6eeb8b9b0fb. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ES5530701175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d1ac0777fa0b72649b8a6391a222919fe5ac64aeed39d147be0b4a63a5d922. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES5531012299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33edc4d655affdbefec10d1c5ed56dec4d675b27247c321f304b6b5dc0d11df5. 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/ES5530500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe717ed0e84a8f1bb059b2e72d1d272048e027a547547b583a7709750472b8120. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES5530701173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f818b371dbd7007ece9b0d72fa3d3b67fa60615f9f9e83e9dfaac0498e85d. 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/ES5531224867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4f94ed1096b3d5e8345e632684b0df2aae91f2a1a5684feae2b4408dc4dd6f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ES5530500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aba428b9aef839b727a89717857854ea225ec4651b5584ff613e8d8b2517fb. 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/ES5530701162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093a718609b3c9602c0680d6e888870bc397333c21313b96a6490537065291aa. 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/ES5530701166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f85d176091758f0d6a77e2a5f92dd278dcdd905ad2886b7f1e5b5a8cd8a7d7. 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/ES5530500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ecc3931df4a324ba031d06d2b249732e9770b67e323709263ee27d50e7e03f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5531010977.