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 0xca27243f5cde357b9cfe2670c10b3a89b6d82ffa691b7ae3a08807d1fec2b138. 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/2159730c-a96a-465f-a461-a7502b389aab.json and https://artists.proofprofile.net/proofs/artist/2159730c-a96a-465f-a461-a7502b389aab.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 0x2aed6baee96137a5601511a7a60fac75d73b98ed0ba85f0441881974eb01f9b9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRGOA1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ad596636fab224f2f3c36dbcbdbdeefe00f28bc22b25ff32ca10baf5da0a50. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BRGOA1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8322aed9e4c0165fa8b4494e7590b98045a1068507517502cd615bc5897ed21b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BRGOA1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be7a933eb296f2527dc2326fc39e0097fd567c04aec374a5be16046c09289ea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRGOA1300004.
Tuto Ferraz Quinteto no Teatro Nescafé de las Artes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ec08a1717d1b37937142fb1588ea6dc191181ef62783dfb06bfcd761d3c7d1. 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/BRGOA2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973913201865736cd6252535edb67fa031ac78ceb6dc65ff69e591b2feda245b. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BRGOA2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419b3c4455d1d888be7e8f9f7a9b6098929297f26c3c7370bb33e33921855708. 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/BR33B2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f6785b68389df8a44c4da350b53d8df97b71e394c03dab1135a9ea8c0807ff. 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/BR33B2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0c76e4d488c54fe29cfec94f651c14b4a42aa79f80bd523e7ffd9b9c11a575. 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/BR33B2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8273b685750647c441f3a018406e9c63a5f2f9f1fea4e63e25b7c6ff099faca3. 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/BR33B2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d828a1f1b9340ad3288b80a1642386e590f8ac5358cdfde1914fc33290532b. 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/BR33B2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775353d2926f56e48af2ce12939aa928eb9583ed3451460fc4403ad9f583969d. 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/BR33B2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd356e9b26bcd91fc9da340f564df22af017a1465023daf56d05e5d3f46a6d054. 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/BR33B2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dac411b14c21ed8671d5bd5d0d554e1f1ff1f0ecd61e73791ee87c8be84dd05. 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/BRGOA2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba54b28d8f0d59a70d16d1f0b9a114a1b5724485ba1a6bdb3bfa65805210ebe. 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/BRTRB0400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d455ab6637c47116b9ca546178c6437712d5383e068e13cf4e7551e21a54f5d. 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/BRTRB0400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316704d285b179165e3c97f83afa6d84e7645647f4800ce654d99a12dba88ac9. 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/BRTRB0400094.