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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a202afc639e12ba3db387bcab86ead7199fcd5da273185e6ded7455d2ef4cba. 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/7f7673a9-4232-4473-904c-4fbc50ad85fb.json and https://artists.proofprofile.net/proofs/artist/7f7673a9-4232-4473-904c-4fbc50ad85fb.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2e0ab4737704f78c59f58fd98cfdc4f7d191109556cee939d861c04a63e8b1. 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/BRUSA0400962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec5051c764bfb63ef5c0a8c01813bab94d1fa5ba1cedc0ed946da9d4db870ca. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRVR10800559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fef940a811a630b3f8b4a5f18cb5158952f7be2bc3fa38577b187a71c541240. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRUSA0600754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4734a9144c25dd6482b52c1046099edd5594129102ced1bcf5704317cd950356. 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/BRUSA0300536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d60d29f9a473bf8dcaf923b2835159169423ff4a2db301af45fcc3ec104810. 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/BRVR10800493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4927273ee1f14ea2c087f5a86117de509211da285ad9fc020b7fd98c2edf993a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRUN91000082.
O Inventário da Sombra (Versos de Campo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5744d539c34725f1d41aaf65f54505be17ea5e5ceb4cbea4c62a9fecab0ce46. 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/BXHF91700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da576141c0262d5c75c6aa64005aa6d33baa96c4dadfb8c0ddd448d180e6b01. 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/BRACT1500251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccd609e1e6d219d50aebd2a94ce94765f8bfc1df3fdb74859f53d6f43eb4da2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHZ31984953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad549b5da3c961d534ba2870c5cd5e7d292df6b97793f877bc54ef8588f98bf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXHF91700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca482fa992a796290aca114ed53099543b86f4c8d74dc64d6a9fdb422b3a58b2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:48:03Z), 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/BRUSA0600758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eced93acfda38da3104344d47c68352b26a39f4b9d75fe8af594f8c45d0d9c. 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/BR4AW1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414f5cfa556f82ed6c0aab0f55c90bd454016c69e4a8b66d4f52c37439687652. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXPHX2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075c30bb46682a21d1ccd8aae1c696e2ba380a64db2dff2ffc887931a075c0b6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ62109109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a5f8ea0a4848b0288cd0bdca2937a000ef8814258c6892a903e6a30f8c6767. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZHZ62109112.
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 0x4fa09e8de216cfe246ee5fecc046bf0c6c682c8192860ec717facd146170d92a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXPHX2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9342f24abc8de7a2a8480d50394589df64ee45a28dc0fcd7e13037fe9fea29. 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/BRD512400013.