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 0xab549bd75b3b42bdefb9ea1c394b28b82d8a58070471a3764e98806df835187e. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/002966e4-7ad1-49e1-9a59-a197a7318292.json and https://artists.proofprofile.net/proofs/artist/002966e4-7ad1-49e1-9a59-a197a7318292.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 0x5a1b3415e3f0905bc014ce8613ee5abe9df16fc607e8295fe12bd57dd42be419. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGLS2039926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd20cc88b74856a02d9841ff5d6462d01f3e5f5df2915409a1a5d936d2cf5d4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGLS2039931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6078465d4ad4d157b3d7e4f45e3c7f87b487788c7c7626cf16b3ba0ed7f1ccd1. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZGLS2039932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e7c31e759df3aa371d0b9613664586432e3364c13f87e78294a90e49fd7dd6. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/US7VG2020389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddbd66c5a4fb1389bfdb3ed06bca0b23e060521ef59df422091b8be94d3f3bd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGLM2175295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fce801e8adcf0cd9341f70dbe659e1daf789c98e4b0b9fcb6775c4e525ccb0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZGLM2175036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490c03f5e8dc661a483f3d47019ddd297f683361d7d15b235304d3e760598ebd. 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/QZGLM2175038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59b0b0771ffa8ff91e07b7ffe6ac9540d58e25be9464de2c9eec709175cc9b7. 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/QZGLS2040081.
Que Amor É Esse (Acústico ao Vivo em Curitiba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c6a0783f9952d64187f69dfd6a2d775c09b966d4cd450c3a85d4ccc04f02ee. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZGLM2175461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422f80ec85f1b99346dc632924c08ad758d673f184a470e1d1bdbfa5253da8f4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGLM2175464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361dea85d50c69907caae778417faa658410015864ee62e6f95a59c1ef817d85. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZGLS2000520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d18bf11e6caf9d13a2d02ebfdbc97940b132f8990a22fa8dbecfb82660a82a2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZGLS2000524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3ff8049473a535d33ff560134cfb3206b67b34b4f42800dde2e46578f3c89c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZGLS2000527.