1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x0f109a8ea8cdf93bd49610d689777efa2e5b90fba2d44513677c883e0df60f3d. 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/cc767292-310a-4572-bbe3-946f9a961442.json and https://artists.proofprofile.net/proofs/artist/cc767292-310a-4572-bbe3-946f9a961442.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe698a2365f6360ff17437fc80866978f947a7367ea0f6a03f88e68b378c18eea. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3YKUHW8e29mjTqtt569bnT.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3YKUHW8e29mjTqtt569bnT.
{"copyright_id":"0x60cae052b5aaeec2ae88dfe50ebd601a5c16fde90d132557697823642cf9caef","isrc":"ES51G2300025","name":"L'amor no està de moda","registered_at":"2026-06-08T22:43:22Z","spotify_id":"6TaI6JIjyveCJHHXpBwn2U","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cae052b5aaeec2ae88dfe50ebd601a5c16fde90d132557697823642cf9caef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6TaI6JIjyveCJHHXpBwn2U.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6TaI6JIjyveCJHHXpBwn2U.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef70005c457c28bf40452fec46caf5447cf7bbfc854e42ba9584667493c66be. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6U1mFQQvgK9pI2r0d9Jgg1.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6U1mFQQvgK9pI2r0d9Jgg1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e019988fe76620d80edc9a286895bd5a5e6ab639e276aa709805567738c394d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0Q8sQOxCAmep5Vd5DvVb9I.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0Q8sQOxCAmep5Vd5DvVb9I.
El Ressopó (feat. Banda Municipal de Música de Tortosa)
{"copyright_id":"0x268ad912933beda3561d54b813775ab06e11ca70e2c9fba6023301b4feeab3ae","isrc":"ES5152301059","name":"vampirs (feat. Mama Dousha)","registered_at":"2026-06-08T14:13:07Z","spotify_id":"0SlIBgw6kYmleYjwkdJ9JT","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268ad912933beda3561d54b813775ab06e11ca70e2c9fba6023301b4feeab3ae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0SlIBgw6kYmleYjwkdJ9JT.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0SlIBgw6kYmleYjwkdJ9JT.
{"copyright_id":"0x268ad912933beda3561d54b813775ab06e11ca70e2c9fba6023301b4feeab3ae","isrc":"ES5152301059","name":"vampirs (feat. Mama Dousha)","registered_at":"2026-06-08T14:13:07Z","spotify_id":"2isnOpckNcAJWBFOjFId9s","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268ad912933beda3561d54b813775ab06e11ca70e2c9fba6023301b4feeab3ae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2isnOpckNcAJWBFOjFId9s.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2isnOpckNcAJWBFOjFId9s.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3331adf68525fee9576caf222cdf9515a815d0423f95a7ceb4c9d9586ec9d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2xevMyijLFhT6G9OoXT7d9.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2xevMyijLFhT6G9OoXT7d9.