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 0xa0d01e99ca2b676c34ff189435e6405413deb1c98331c5ed61ca5e651e8c0540. 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/ccbe7ff1-df27-4d9c-b4db-fb76d5ee6846.json and https://artists.proofprofile.net/proofs/artist/ccbe7ff1-df27-4d9c-b4db-fb76d5ee6846.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 0x4af87c7a4e8226a6f5817ff1601fa90ca831aab2f28966c710b2c4ee54682373. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BKTTS2300059.
Água Com Açúcar / Escreve Ai / Chuva de Arroz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0895ef9c6aecd1ed3687ac9b77cf24e21b5d7d09a1dc6f998a2862de9ac21169. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BKTTS2300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4878cb16097e97e0ddc7874539a5aea304aa33f98e99b436f9df9622584ddc02. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BKTTS2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3f04cafcc79c043a2832b68babc36e66683ab5f1df2fcb24fcc8fb0a997a03. 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/BKTTS2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270183f91331d0fdaa927b64bffe7d38c1496e00128e198204cb84156bcb35ca. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BKTTS2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274bd0917cbc3be2089a8b8fac55d2cf9c67569b2024be23ec15a220352efa18. 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/BKTTS2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182218d51a43ee802a8ee93025528dcf71a216a562cb294bbb0813cbc97629b3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BKTTS2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0f990e76b7aef990290b8e379a9cfc52aa74f767e24eefe5b5b305ef1075bb. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/BKTTS2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7c4ed5b0cb52f8a958a937804ff3a5ceda7f9eab0923c4dd9ee1fffabdcc5f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BKTTS2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0715ad5c0fe34949187088129b30e6fa39a686c39d29de58ca4e2165ae52eecd. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/BKTTS2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0b9c22b5ba6b964b6b6ac9adde0a2f54b24609c7aa6108414200c816bfc3f3. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BKTTS2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bbb95b0592cc95be57c6db630fffc0f0e1cbf2606cd8407a05849dd6a0e143. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/BKTTS2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb4afd5408e95713e117b23e82b65a93974bf545e38cc37acacd6752930123d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BKTTS2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e38db6d59373cdb4b8dc185d0d464b827976675c5c528f674503af05862d4f. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/BKTTS2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ab2dd5ff70ff939b191889e09d72ac58efd10db7c41ee0c3f85ed9625a9761. 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/QZNJV2574690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35365598160d427c20471ab8bfd66bc19663b9c9129e562cf991f4935d44ad24. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZNJV2574691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fa74ad4bd1f6a92a637c92c8ac023e3069adfb8e9185e66992ee2114a9ad23. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJV2574692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80f3b1d3304bc82ec3e91d35c72c68d17bbc49e0f2b6c069476342997e70aa8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNJV2574693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf666070409168c898410a09ca48f2f460961bffb74b346c642c293eded50281c. 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/QZNJV2574694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c92ef2a26edc687aa5d1530bf1c992fee3146e53316d455e46bdcb72a72085. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNJV2574695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94befb5913fcab99900ebcfeb4b14ec3bb06044e6f8cc4ffa2ea38a186da6728. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJV2574696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50448016c98aad2db3e44ac164c1b7eb359ee55c670f8ca9fd319b8aa643d44b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNJV2574697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f3f8fb4c064095ef5418069d34d16019b810613b0118e6c9ad63341bb2a58b. 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/QZNJV2574698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd251d207c66bb54d541cf0a0f0ebfed162e8a4d4b4e49c142e2bd4d5abd7602d. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZNJV2574699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8166bd8125fd30b8d53080a49d2c3776d1295549a70202009244c6f147a366. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BKTTS2500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2826255725d3340df22a163fa56c2f743b9da93e955445c8de2d75ca7dcb972. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/BKTTS2500138.