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 0xd7790160938e1e6ca0aedeb8d8fac850c5f763364ceb74e6bea8aaf40f057453. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/400e3767-1749-47bb-802f-a063e9d06818.json and https://artists.proofprofile.net/proofs/artist/400e3767-1749-47bb-802f-a063e9d06818.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 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 0x0662e8e29de48f1e1424e6e022c9ae8e1fab8650919898c699ce27f2b93c9666. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BXPYI2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98511e27a3de6c7662e9928a73c35284c2ef3b48bcaf7f5a1a4f906c45f01ced. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BXPYI2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1600ec2ef28df87659e912cb9f749daeb1cb56cb403309eaf87ff03a2c41c53f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BKPYI2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37faa206b61d74a39bf5f8f1f81d516467076ecdd6c98f0f16bc3d45f34c266. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/BKPYI2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b5eef710d3bc352fec5156d7300beb4c0f22d8d1f67e974d7a181af79d9795. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BXKN32300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8ca604804ca6e1e48bc1f52ce3236c7cb1822b7b7c3f4053a4372377b7b72d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BKPYI2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbc2d327a86f18fe86065930d4af44adbf6730b3f08e46f5c08658ec9ef911e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BKPYI2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb878ef8ac14b0ba0d0327fffc95acd6f2fa0d1f35099e18499a2a5dfedf31e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BXKN32400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55f3eb19beda37273145495445294cc62292379fc4ed683be61abf43531ac3e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BKPYI2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7b089aba25aa9cad850e826e9fa6f1c9684dfdd97663d18a0f14a467f60236. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/BKPYI2400005.
Época Diamante / Dono da Porsche / Vuk Vuk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc97dd311110866563630569f93c5ff0c46cb431d7eedbeff12c7e9f6a280a63. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BXK1F2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e5d44f26b56c0b75c9016b975ec713d450548e5cc7f08c000db558bb3f9e59. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BXK1F2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a4c7b3176861ed403096be09665f89098631f40a7dc6cee50a81d2e8c7f0f7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BX4IU2518007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa344832e8cd1369355d380db49cd04b74044ab8d3a64a43232aff1dbf727ec6a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BX4IU2519281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80948aca89945ba6524ed86de4b4b2f0f2642362387566d299b9fadec04cb178. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/BX4IU2519282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578619b6053457335ce40e7d446c5a3ff9f1ce096c17a421bc85d2dec2428ed6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/BX4IU2519284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e1d8ec0a263457559746ce9962ee1a7e5e59399b9c1c0822059d0be56bbe69. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BX4IU2519285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df798bac47cfab2818f4240df9476351b8d85aabe857e4f65315158ff5b8752. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/BR9CI2500002.