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 0x3f95f129f419fbd5fd08e08534b8639f4eb4d8cd7bbf16f5197eb81de0360757. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2730f3af-0109-4311-ab1f-8701a8238567.json and https://artists.proofprofile.net/proofs/artist/2730f3af-0109-4311-ab1f-8701a8238567.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Um Barzinho, Um Violão - Novelas Anos 80 - Vol. 2 (Spotify)
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 0x494a100f17705fd172d5e61214e357abf4e68832164a1bf14ca2e7a50d14578a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRUM71400012.
Quando Fevereiro Chegar (Uma Lírica de Fausto Nilo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dd1613989e0a75958a1ecf48054aab59e53f8ebee3fd17a476b371baee354c. 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/BRP1A1000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe62ffd844a075bcf0dcc56d7cce58ff91be3311ae44fa52a3d8024f96d41af. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXEKO2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293de78fea6ac8d1049ce6a4cb738fc091559cbca979087faabfc2b9d0db51c7. 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/BREMI0701169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc307f545762c9f4e144840f417329ea230f95598511b91e4913f6251d69264bc. 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/BREMI0701166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb863e4a6a3f7fdefb93944b6d158beef2490105f039b54bba71fb2002b06e8a0. 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/BREMI0701171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc288d49fe48fac8219c62c72507be81862af71ca1150180b63d5fc00c36f2a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BREMI0701051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439f6ab0c7d67dccbb85f437adf43a49fa1f708fa196a79ec1385660c3c951c4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BREMI0701164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadf878ae39dc7f40214b628acff8dea1345dfae468019997e48f5fc5a238ecf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BREMI0701173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504d8d8fb7751913edc3a5c0a45d3e9faa706d5004291f48b567926cef87a1a5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BREMI0701163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c7f9b68b4a9b65bf74c823f904fa09d71fe83a151e2df50de2c5f5f155f51f. 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/BREMI0701170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fec95d8a6a7585219ecb02e4ed4e56cca1d4c208aab42f061e9199bfa2e3368. 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/BREMI0701172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afbb85b585d030b56df31da11b1012b4ce1ec4826cf6527686302e970c5e019. 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/BREMI0701165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c325b8b1bc95fc18941a7697cb306426abe339750e4560f2be982b5188b6fa. 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/BREMI0701168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5f211723231c865350af5310459a3d1a31348d5995c050b263dd56d1cfc80d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BREMI0701167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855e0c715fce75a9f0cd25c1f164425d0c84ef6527a040386afbdab49685a380. 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/BRUKM1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422c39e95b7b37dd75af8a51e627a2fdb7ca6240adc060542a3ee21566462286. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRV3V1300006.
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 0xc6768bf85ed0ca24c6b0d564ebf79ae673737f16c78e60e638a4a0004fbef8c6. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BRMUD1800078.