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 0x950d50c1daca1e973db926a655867fb21a9cd0ebb850501fca71a7ded72817eb. 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/1ab2b1c0-3154-44b7-8316-da0353ccee67.json and https://artists.proofprofile.net/proofs/artist/1ab2b1c0-3154-44b7-8316-da0353ccee67.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 0x47fe2c728aff16fc7d586383b951369a82960bdb06912e84a9814b29ce08fb77. 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/BXUGU2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c73a41de83249dffe5e20fb437c58e4b6c836c71ec35bb99d9ad1f0fd729991. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BXUGU2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2914c2a4aa7c9cd9c73af98e4fb4ed81b3e049f953310815bee6735659cd53. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BXUGU2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5f3681da0081746678b3767d67e18db0ab80d9629738d9a8c608248b8d6213. 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/BXUGU2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c73a41de83249dffe5e20fb437c58e4b6c836c71ec35bb99d9ad1f0fd729991. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BXUGU2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437970ece8dd1c01f8076731b5f7bee1905bcbd6e555287721638e82ed5d5cfa. 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/BXUGU2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2914c2a4aa7c9cd9c73af98e4fb4ed81b3e049f953310815bee6735659cd53. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BXUGU2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155785fdd0f15499a827693bc2c5c7ebaa4e23fb276ec0e1e23790ffdb494f62. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BXUGU2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6c3078ac676aba7df6131a3d8c6ff16a56199e4c9ad77c729d998f156f7c53. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXUGU2100003.
Pra Dançar Colada (MangoLab conv. Alulu Paranhos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd05eed18910a71ae80d67f1690132c6859c0f95a19636211947d4af15f061f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc0a3e5014def2b8ade433cec248d6930d701b5ea77b425d269fec7f838e112. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d66f5b121d4729c63742c2db74f252f3190a61237f4553c9c56c84833496a7. 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/BX7MG2300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8880af8c1637b7a05c625a124fa2c7e56f36c256845e3b6dd33eb3cf4cb613. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/BR9PP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acfe0b1bb2fbe4cfcf3fe684d4ffd4e548a913a67d4f78350183e155dcb615d. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/BXO8E2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbe3e4d2a3f2bf8c995db2285487bccdb7a3b6e215269fdf675bdf21f1b6335. 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/BXUGU2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd461f9dfa42ea231018e2b740ff2ef0a8e4bf3ec1b256d619a64241287bb7613. 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/BXUGU2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46ba22a82b7d3ca3cc2213fee5c4933632b7e3a4ea056f69a71b2c6a9912a33. 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/BCULZ2300001.