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 0xbd89c4f069805e9c3e1ef5b2783d5ec98ff691a54ae183f04b877f920bc2fa82. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf1612fc-e2de-48ba-a5ad-c67268d44766.json and https://artists.proofprofile.net/proofs/artist/cf1612fc-e2de-48ba-a5ad-c67268d44766.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arioso: Sinfonia da Cantata, BWV 156 - Versão Piano
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 0x47a25811fed577b05827a57a31bb3973e7f7b4c6440d7fbe421a3ef3870e80c7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX54B1900001.
Fantasia em Dó Menor, BWV 906 - Versão Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6accb62bca67f73381669fb24726e819cfa6a4e040911804d627f80418504795. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX54B1900002.
Abertura da Cantata, BWV 29 - Versão Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea61a0c2911cec1b361081f31cdf319614271fcefda6e4ef0610530f9b4bb191. 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/BX54B1900003.
Seis Variações Sobre uma Ária da Ópera - Versão Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516d6c6eae33c4096cc438594002b331d27f65b8c9b8f46c56996631b1f575e4. 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/BX54B1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf368eabc89b10afe21fd82aaba4bda9f7ca5208b1865e46f077326535a24c091. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX54B1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826a8e0cc72755bcbe5a9e91e060e8140ea7932cd62deb3141538be8b979515c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX54B1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5743f48fc6e150284ed50968883f7f3153546f6a44a4bde13645bb56d5391abc. 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/BX54B1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96227a5e166588ead64a30b5d4bf1eb617d8e884006bd9298ca038e83552e81a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX54B1900019.
Prelúdio para Órgão, BWV 535 - Versão Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b2f15211dbb30449d18809665ca3d49c48547758aabcfe3fcbbf195a9b015f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BX54B1900004.
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 0x4319510713d2e7ae2db87e28665cac13f7daf794d40fc383feab61cf6c3f3c38. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BX54B1900005.
Noturno em Dó Sustenido Menor, Obra Póstuma - Versão Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816cf0bc3f4c6740746e1b52af60cc19810d519e11bd509f1d9aa84b466d3548. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BX54B1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8374e68118cca95d5c866f55b616d1c16aa29f96932fe4705c1cf99706bc888b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BX54B1900011.