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 0xf99d70cd2068592c6be4876741afa2bfe334b2a89824e45ab5739a29832be6f6. 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/87940198-9769-4cfd-8dfa-fc9c19b6ebc0.json and https://artists.proofprofile.net/proofs/artist/87940198-9769-4cfd-8dfa-fc9c19b6ebc0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hinos da Ccb em Quinteto de Violoncelos Hinário 5 ( 1 ao 20 )
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 0x4178f2e7f7d6477dd5c5f85f3a7a38079786360517e559c534410b216cdb900c. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/BCMB72000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75184b1c387b62cf5f5e4e748be7829f4d3c2ba8e794a56bd3c4f90d2832d392. 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/BCMB72000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead7d6c5c1b2eb0b0adb2cadf7bfb01abd07a12b0d3c07ac5af4e573c72ccdb7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BCMB72000028.
Hinos Ccb Violoncelo e Orquestra Mauro Brucoli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d813761bae10fc00bc098788bda5da58e1abd4e06f292d489c7671415627809. 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/QZNJW2342976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67120d046acfc806f2e3bc712fc7d08e1bf93aedd16327a7a95e6464184c51e7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNJW2342977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88919067750970b547f144e59d7e90d395b3266021f340fce1e04b88ccbad1d5. 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/QZNJW2342978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3181036a1c1320edf55973a4b672964b1e7144f1c98d758f890e8afeec1c86ee. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJW2342979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a489bc3b4c8a4f32cd741715e67b46959f4d97e3bd89a48d4e6eb8ae058401e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZNJW2342980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e55c9ecba90a6f225b580b1bfa49416630b99b91a6818c186fa7aef2d6f06e4. 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/QZNJW2342981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c30d48b37aea6f19ec5d0b3cb5692257dada9c807b5da3d561082861bcb32ff. 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/QZNJW2342982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4addbac091b57ac97d3a6e0386749502cac35825d87bb11d738aaf78ca1e4d4. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZNJW2342983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4add1458a1fda519701b7ad9cccec607f6fcb7fd10182d794ba62b76a06c8f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNJW2342984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7d6a201e8c0ab0b8135e3dbf62c11fe4e2c886001818734e4b45abc931bcdd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZNJW2342985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b72b7ee4a44fca7c456e91ad6219a501a69ece119f8e63b335c19de9a7486c5. 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/QZNJW2342986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9c68f593ea78571cd21b6643b06805dcf47e0c0d67c2fce8888535f9c51eaf. 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/BRARP2000155.