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 0xf703bde86f5296f3dc9be3dc3375e4188528dc6a8ccb736c8494d60c299bf13c. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e9566c5-9a0f-47a9-8851-b6098d260e45.json and https://artists.proofprofile.net/proofs/artist/5e9566c5-9a0f-47a9-8851-b6098d260e45.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 0xf77750d3d34e4f8f972105327177950f55543652843bfe0422a9d301aca637a7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6N21536854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525d63dc7bf8e3b6bf7e452886c8793bad564c39c09021ad0c2ef855cf1467f0. 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/QM6N21570873.
Marca de Gaúcho (O Universo Sulino Cantado por Nossa Gente)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456dbb3a97c694abcbda69402de31fcdc796bdd1130027b22a68296c0a97b234. 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/BRVR10500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f3670925ecee1f91f108a6d2778bc0169aa4f06c80964a6fbb289d54001491. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRVR10500397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456dbb3a97c694abcbda69402de31fcdc796bdd1130027b22a68296c0a97b234. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRVR10500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f6b2f8b06cb95106d3fad9b1a1227b2b003cb1486125041cb5a3d7377e9b91. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRVR10500693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e431fb181faa7e3d78b62bfdc0cfd7b0f04f90aac3e61909eed7f5a0957738. 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/BRVR10500904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc444862073b584728cfd2fee1b6d26e76cbf0d4b50b0e93591a0374bb391540c. 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/BRVR10600130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52675ab9a52b1cb6cce1401ee29b1e46268b5c9f7e799c37aa51c1f45fd0f7ee. 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/BRVR10600174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe233a2d766a67feca266b1fda16f447f0a3fe5b9812734ff3056f140a6184ac4. 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/BRVR10500929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfa9f328bfe8bd76a414b5464ee73aad0b990a346a207ae1dc96fef65bd972c. 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/BRVR10500917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4922a1355297fed7865f7b2bf98e0adf52a89c766e98dc862c179157107fc70. 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/BRVR10500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eace16cad38d365bd461e101352dee1ebedc78b5f5a283eb08ed7691b6f8e6b. 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/BRVR10500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb01e93622cf5862b096c0ea76d1f4f5fbb33f090a3816c92f8e2bf186f7227. 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/BRVR10500681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151f7e9ccc813c92ff054226a7234d7097795fd35f9e9d9002e2294ccacfbd23. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:06:05Z), 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/BRVR10500408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3d560d16a4fa8c18fc611b2957f5f4ddc3f6f3b30a78302af713f962eb60f4. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/BRVR10600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074c26daedebba71b8f67bfa7f78ea2c5d52919ddb5cd3276669640456ee36bf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRACT1602244.