Eduardo Gudin/Paulo Cesar Pinheiro/Marcia
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 0x1fba6aa89fdad832d4b4b63f824acdde6a8091af22704876967e5e160ca212f4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88a5b107-1f51-43e1-b336-d840dae2a2b7.json and https://artists.proofprofile.net/proofs/artist/88a5b107-1f51-43e1-b336-d840dae2a2b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2 Em 1 (O Importante E Que A Nossa Emocao Sobreviva - Vol 1 & 2;Gravado Ao Vivo)
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 0x4361663ef8569f6afcd04bf16ca0b882a9872a37f3bc94ca2fe10ca9eb9a28d0. 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/BREMI9500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfda81f559893770c73818e7a9dbef7b2dd8ef675565e73f0402717c92eccbe. 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/BREMI9500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2188c832e1989ea9e090686737e376bf53d77bc6370cabaad399b1fcf018f20. 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/BREMI9500427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178002638e14789ebb16d7639dc3fe1de512068774071a9146220ffea761f8f3. 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/BREMI9500429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6911c824486a71bc690d29fb999f66a0d384fdd26656d3dabbc5f9f41c8bc4. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BREMI9500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43dd4c3e7dd78107121b06e1e98be4e888be57616086628a77ac5347fefe8ae. 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/BREMI9500434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9424da258b63c2c625124e21102a602ed6270693805e7fdc588871612542af6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BREMI9500435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06ee84558a9a593e94906c4d80db3f79189121bd36fbe36a1b345b263d444d6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BREMI9500437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d2a96948300e7d8016ed93a5976930ac3ffa60d92400d4c1451e2d2f2dd5b3. 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/BREMI9500438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fc39c22d81c9af56729cea89e6e4609274a328086c95d39636905e7e584831. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BREMI9500439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc886ac42d8067f37f8f85c1a32a7c210bb3fcdc73eb379104f4d8830b3c46e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BREMI9500441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5633cbaa3f7f6abb804cd7d9e42b571fe034e0c21b7316b4c957d71a54a7a4. 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/BREMI9500444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a751b26bf93ed1900c59e260a18ee5f0f30c8bf7127edfa263f554db5af157. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:41Z), 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/BREMI9500428.
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 0x8dd75e5223ab48ce59b7eeb7e00c15a2d7d02d85111ec6eef63dee10df37db07. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BREMI9500431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3875fed7302cdd7113e47f91236c65dcb1dd9ca92f4d4bed3905c09dfda6190. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BREMI9500433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a7d56c68519f5607a56c05bf0809e42d9274526e2788afdbf6765c2de04240. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BREMI9500440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5212378adc9b864e880a4b183e535d7f1a699ea75b63b7daf5c9cf0b31403a71. 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/BREMI9500442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be4b5106504acb1383fa93da71b594282cf57ea4e0f94d392f16720574034af. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BREMI9500443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab83ae4d725911b58d32c5b803c7dfb5011a30a1fc5438eee8854a8b24f0b85. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BREMI9500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c35be25fc60fd3827ebcc29615cfc22d75f67502bfe1d2926ba94c1f4ad0385. 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/BREMI9500446.