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 0x4797aceb1821d8a9b84f3ec5a3074ead89e60c27d29ea7c7e7b864860c2b11e5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9df2183f-751d-4d59-bb3a-3afa481434f2.json and https://artists.proofprofile.net/proofs/artist/9df2183f-751d-4d59-bb3a-3afa481434f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x67cff31409878803b99b4c5ef1c9463e721a6612ac2fa390e9cd7e215fbab667","isrc":"MXB051500001","name":"Cuánto Me Vas a Querer","registered_at":"2026-06-18T05:55:05Z","spotify_id":"4bmVDj2kvFNWCUsUiaA1zu","type":"track"}
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 0x67cff31409878803b99b4c5ef1c9463e721a6612ac2fa390e9cd7e215fbab667. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4bmVDj2kvFNWCUsUiaA1zu.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/4bmVDj2kvFNWCUsUiaA1zu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9243aa0c1c203fbd42a3a61cef3cb5805f64b812333b14aea7a3785ce362b50a. 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/4mSKEphgzN5N1y1xz0zmtx.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/4mSKEphgzN5N1y1xz0zmtx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c698e576c3a197e960419471f1e5ff129aeb7ae5b7efc8f6811f4b9841501c6. 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/272wvjbAu3hLg3mUmGld95.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/272wvjbAu3hLg3mUmGld95.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a0909a0c308e09c5123f8844d3e99b49eecfe243526026be39f9777ee9ef61. 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/4B5tXuSOVlaSyxltVoywv2.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/4B5tXuSOVlaSyxltVoywv2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd49319d42939b9f9eb138c7cc7a0664668816738159d82b42b49f30db133e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5L2oFW0aBSQ0Zwg6ij8eQj.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/5L2oFW0aBSQ0Zwg6ij8eQj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b168a7356865ba3927d249faa13c2e4347ebfd51c074b21d681e6097f40f30. 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/4TQjUGDWcMGM5gCbltiF3k.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/4TQjUGDWcMGM5gCbltiF3k.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32886f254225b76d2b5c8a7d4dc38bb8739651b8ba7446d0f89a45c981d811c9. 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/1fxpBJaE2nXuRAa7ZgfD3I.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/1fxpBJaE2nXuRAa7ZgfD3I.
{"copyright_id":"0xf1342de98441c4d1eb5ab5e57b095983f7d16a6ccbe0cbc7dc92aa538357e03d","isrc":"QMBZ92198675","name":"Ojitos de Aceituna","registered_at":"2026-06-04T13:51:15Z","spotify_id":"2KhOJ9fPnHE6HJd7R6jF2L","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1342de98441c4d1eb5ab5e57b095983f7d16a6ccbe0cbc7dc92aa538357e03d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2KhOJ9fPnHE6HJd7R6jF2L.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/2KhOJ9fPnHE6HJd7R6jF2L.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd80e2343dd3268cb87de61b169620c448c04c31944f0f212ed69da53e52220. 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/1oqpMRnWkrQ2sqUSAhsUaw.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/1oqpMRnWkrQ2sqUSAhsUaw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9152e7345f37832543f1fe0f18a890cf1989d99a1b6d62f5fe6f6b33a734d2. 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/6qdBiPGYhaGZulT2nR8cmJ.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/6qdBiPGYhaGZulT2nR8cmJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a16800d99e034122f55d78aed6a8d72e41581ac9695f778ab5133a9f907e02b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2Zh91nwJJNTyE6WzXfuZrO.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/2Zh91nwJJNTyE6WzXfuZrO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2776217ed6810378ce3a923c2644ea0fdd82cb145b407bb52b31002391feda3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5eWe2F4gzsH9dHkYSXav8r.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/5eWe2F4gzsH9dHkYSXav8r.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2776217ed6810378ce3a923c2644ea0fdd82cb145b407bb52b31002391feda3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6uV9UlTSn7WbXdfgiLkdk0.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/6uV9UlTSn7WbXdfgiLkdk0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2776217ed6810378ce3a923c2644ea0fdd82cb145b407bb52b31002391feda3. 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/70NxnUV2P0uOus3V5eL9gs.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/70NxnUV2P0uOus3V5eL9gs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3006954fc8c6b33175b9a489cc4d32b4f03c3ed5674d679d2718ac4078c4b6c. 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/042bYfY2kEpFhD6bfRvyse.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/042bYfY2kEpFhD6bfRvyse.