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 0x64303062a3def3f1d252d8ac8687988abdc9bfaa3cec400d4e9fd665f0829b27. 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/aed76d4d-0c66-4b9b-b64a-69336ec84d94.json and https://artists.proofprofile.net/proofs/artist/aed76d4d-0c66-4b9b-b64a-69336ec84d94.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mas Rancheras de a Deberas (Dime Ingrata)
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 0x096bab9dc896eff891d430dd4d1e5cde1c902d41367f7a241cf5d41913e0244d. 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/US3DF1523542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0c231acfa5d13e3b3c2daa279597b6ff4f77dd93ab3a74c378d48110a6a899. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/US3DF1523557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313929e74297e4fc9478ad2c8819c3b246ee0334431b0cfc49a6913a54fd1b5c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US3DF1523529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7834f0b00b25c0c2002e97c2d86e594d5774be0e899e1667bec493fb1424ca78. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/US3DF1523558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e7597694f7458436d820f5ad5903e73d009682c9ec5deada6fc53178000788. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US3DF1523559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90379135f0c58738aa8c734e5901e14d70c2bd90599cc6ecbca42db0c703c42. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/US3DF1523560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ceac21a0d2758725fa4aa58ff794385955ed5e7d3c6089680f725e070cd162. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF1523561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662ab802075c7bfd4b2cdb2a9013fc225ae605851a4318c24f4efbf67b04c386. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/US3DF1523564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941a0ab0e009de4884494751859e7809fc0221e95225414e668dd834122ef8a4. 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/QZNWV2089193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843e95dfb1d6d551cdff98ad9283402df648c8ab7be8167834f0b25b2b7267e8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNWV2089194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799b31b120e2521a04dd6e05c7589e486740a4e4bfc5641e9eb433ac3ea12099. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZNWV2089198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaa99747e2e94b98ce14bb47b4d41f162ba8297227112a5fb367650430f3a3f. 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/QZNWV2089200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56297ac79ba213245513ac411d7fb920fd95682fb71d79d912ad2a7365872372. 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/QZNWV2089203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4debb592f2e154bc1fb24dd9d8b5d42235206fc51ee8f8b818e4da4b3bbbbf1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZES62171741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ba0550c58643445dca021dba4259d6db223ce445f7ed955979c09a02edc0e4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES62171742.
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