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 0x85f2112c99b3793f39bc60229183d7acd205d212360174ba861fe3ee7e799062. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3415ce0-c37e-4cb2-aadc-a35725ba47c0.json and https://artists.proofprofile.net/proofs/artist/e3415ce0-c37e-4cb2-aadc-a35725ba47c0.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 0x917ef117432b4cf5ed3d3d134b91a0eb1bd5aa7e42e8d1a73b7f0bd44fb97d55. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZEQU2246096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefa7654812ed7bdc51ec4100a7c61566dbad6f8ded80c1c593747ae8369706f. 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/QZEQU2246097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150992806581c503b7472b7987b979087e815967f999edb36c52333f53c3fb02. 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/QZEQU2246098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9194eacba80d7842da1cb6a66564618d632e56d49e67e2ebec7ef53ac813af5f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZEQU2246100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff68a118b19582bc8531eaedd1ce9aecd3171e9f930b014aa3837ea20313681. 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/QZEQU2246101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771f4e94e54d6819b1a7826f8b38a8b1114e96f72324a1b10b768b9b74a74092. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/QZEQU2249023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3f8f0980bc1af7d08f8b72781d6d140acf23306f066b938f11dfdfb402d1d6. 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/QZEQU2249024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d937e898ebbe10b9aed515ac993d20e3476db5de8808bc3a6b181c1dd372a6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZEQU2249026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f25e1b10702d58558765e62cf55eac46963f84349eabd0b4974094882cf646. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZEQU2249028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd7ae3fa8756e269c7b38f0f38a08feba35ea7b8c12480809b809dbb6485db2. 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/QZEQU2249030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8859f29fc8103072e6ad6fc44cceab84f2d1f2f600b4b5a4e1417c72956873. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZEQU2249032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db89303d43e6ac1c5eeb0c7c556038aa1fdcb660c6140cea6d52b471453622b. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/ESA112302753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44de823f37f04cd6cdb2077f2a6f1a50af76747a3f8855f55e55a611459c2d29. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA112302754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0929ac21cf8797e7f435d5b8f5aa902049191964791fb790abc9c45f857597a4. 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/ESA112302760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b09208def4e249208c8252edcb6df576b25889ebd2217196b4a84c1da9cba48. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ESA112315413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b68170cebe8c63b7460ef6350fe5f1fad11a7f56f8745134ee6226a829cca. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/ESA112315414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049285b30132c6770508e27c57407412579538c4933e4b999824baa6181b09c6. 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/ESA112315416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275b2166c3ca9dd93bd7dde07c0e218ff35dc0705c0cebcface1e1eb95dd5e2a. 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/ESA112322975.
Mundão de Solidão/ Bandida/ Mexer Dançar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1e2aff7eece228fa6cb70a648e852b2a5163808dd492272aa6475fe070b95a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ESA112456844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dca83da982667e92934a2bf73a07da517ad289756548c30a9c0574ac8cfc2e. 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/ESA112456849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e78de8abb835707476733b2194bd053c66506f0082758f0dfe0c1987fa1e3e. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/ESA112456852.