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 0xf8d027928467c4af5451846d1e92ff63c13ef854181e59a3faf0564fec3c3c7b. 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/28d187c3-9c47-4100-bdf8-096997f04786.json and https://artists.proofprofile.net/proofs/artist/28d187c3-9c47-4100-bdf8-096997f04786.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Garota de Saint-Tropez / Carta a Brigitte Bardot
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 0xa989566a7758fcf45ff1deecf584768972e762e2f2e94aea1858c90a4ac19695. 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/BRBMG2200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86971d6f1501e0cef9baba3572212170e97ecbf4d714f9d1d653b5cf68cbe705. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRBMG6200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97da067a6e9587e8967d63206a468c2711267d1aca41f4fdfa90f672c027f984. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRBMG7100062.
The Music of Brazil / Jorge Veiga / Recordings 1944-1949
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b26a4e9328accaa3ccde0fa4dad8483307513a7d3041986e840bac900fa87ee. 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/BXMPD1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6583bb831b35dde53296832e34b9c6843244eec262a8dc2f86e8aa6d72dfa07. 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/BXMPD1900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbc8fb1ca2f241f25f77c46a7b5b25a8a22898a7776f23e645d4c2a92e44103. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXMPD1900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0a761cbc6126affcc46bb96d824eef0ca779f3099562025966274578a394d7. 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/BXMPD1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecb33fdb2e80a3c5fbd3e97d34855ba7c300520c1cf960736c17f98d08b49f3. 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/BXMPD1900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e94dcacf145456e9575a1d4cff1f0b3982ec0e3ed8ecacf922930af5f7abef9. 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/BXMPD1900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacb157aaf0bbec2a73c925eb776e78aef68841ad603e488e1e3f79d2b32414c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BXMPD1900052.
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 0x68e75ad2fea637b67f3a6df2c3a9837a792813def4ea98cc6ba5462d353f4175. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CA5KR1820798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a62bc914730dfc9a32d0785c7fdc55f436d23ad60ea73120a4b77e23cece95. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:24:16Z), 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/CA5KR1820808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440e844829a9e924f6368826fe08cc7cf9cf63c0836bb042e6f2025aa7142039. 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/BREMI5300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e18492c16f40d8e5314885e11d9c15046c28281bb965f9ff49854d4d763f32. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BREMI6900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97da067a6e9587e8967d63206a468c2711267d1aca41f4fdfa90f672c027f984. 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/BRBMG7100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0159f2b55daa26a81d776d51da3e84981d390442b7e84a18211ffdf90af0a390. 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/QM6MZ1497662.