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 0xf0e725ccd62b2cf416b61eeeae145a820dd96d3b16facd3088f26f252319685b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28066216-637b-4f3c-9975-c1a26b6fec8e.json and https://artists.proofprofile.net/proofs/artist/28066216-637b-4f3c-9975-c1a26b6fec8e.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 0x9c8219cad97fd7b003afcc7ce08a85d262121514b600db64af013c1757376ab9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/BX4IU2340325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c6cfeb1db7dfba7f3f2c894b6702d5c729319c240090b8e2b15d611da92f1c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BX4IU2505098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6464a044bd91eda03f4c47a8c8e6dc9cd09c36ad9a66d49ce61128bdf0d50c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BX4IU2505099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a190b3ae41989f0c99354d27f6541af11ac5a3e91359f470deb820e00c69c2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BX4IU2505100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5921b16dfdf32365bdaa39363fc493d3ff00c497e9336d8493815d13ca293a62. 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/BX4IU2505101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddd3a8f7b51917b6653648b68de1e50f0fc9f1bd7ee2b36541dcdedc52ba58a. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/BX4IU2505102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a762f0e1d5d3a0820f6c008f9be9da44a31d377c8f038c2f1139cd4a3b2ee4. 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/BX4IU2505103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1bc3cd2f6b06d6435e0d59843b46514ed603410c3c4c2c544386080cbbb0c8. 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/BX4IU2505104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5412e8ff1c0e64504a555734888fdc91faf2ed1a7b6b2a8d3c41e2debe50fb69. 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/BX4IU2505105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb4725956d60fdf161c3ef75c59e27b61e908a5a22f3607176c0bf011a6135. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/BX4IU2505106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d4f3b34ebc39d77f9621f809e99085985a2edd5cd48b3c3e1c90a5bef9a3d7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/BX4IU2505107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaa84ed9db94a6b16ae0787ec6eede8900731e20eaf89f6daf0a4ea034fb27a. 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/BX4IU2505108.
Meus Canarinhos/ Seu Beijo Me Envenena/ Você Já Me Esqueceu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcb67307c69351845e3c6ef0d0c7774f644cb8c758c0e9fe30b83d431e5b3eb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BX4IU2505109.
Adeus Mariana/ Forró, Gado E Mulher/ Fruta Madura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803bf962a7b08dd077a0156d819bee36a0825d9b7f00bb0fa55f8cbd8195f611. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/BX4IU2505110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d0e2282a691f33289863834b718607922c9b9552b889c05bcc5ca442a840bc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BX4IU2505111.