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 0xbc38b42549c3b226d18d5e2e988129c3fc5719e855c2104fb744f13b07da3b81. 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/92240b57-4526-43c5-8c1e-9d078e65ceb2.json and https://artists.proofprofile.net/proofs/artist/92240b57-4526-43c5-8c1e-9d078e65ceb2.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 0xc935706630a857c349f5622ac905b904fd1aafd011fffc652110fe608e3d456f. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/BX21A2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1925b80aef1812077f71788533be224613dc14a76bdc1585525f5caee1f89b2c. 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/BX21A2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0cd1d1ab32c24cc181eaaa7ef3d7a879299aa93352b848ea31fb100ef82a98. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BX21A2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e73194d5069111bf92e51a62f412cde87a6fc17c017ba0d0a5b15b90b319bc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ILTON2406212.
Medley Nostalgia: Anjo / Quem te Disse Isso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78525f024fd95601f0ad2746a701ce466326e006bdd1f35c685f2a0449de438f. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/ILTON2503790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0eec9bf454d84a23ee64ed4f9fe15d57065dba00de0c743944620a24b87049. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ILTON2503792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0435a4071f14ecf42cef6a06a791a7cd36e29ad2d303aafa17674e8e3a6eb2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ILTON2503793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f32768b7222ad5281087aeaad81b236638bf0e1f4f19564f4ef92c4e0d8c54a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ILTON2503794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7632fdfc457fd48f3b80db2562cf5c2a12021b1e9bef879b6d924c7bd78b79. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ILTON2503795.
Medley da Resenha: Festa na Piscina / Carro Pancadão / Galera da Rodinha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae9224dc3b29b3a8154270a89bb48d6955c7c8395fa0c12ff1b7633f786cf4d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ILTON2503796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b61253f15c617a0290d685b2fc53c89a6e2d740351e02692ea389864e410594. 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/ILTON2503797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866f1b5b3613b65c2c9d79dd62768acae7d565d114934dac28d145248ea72237. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ILTON2503799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb888c74bd64fdc745a935fd7872ec1c3dbcc43b8d07981c9218ae02ffcce2682. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ILTON2503800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c37b11358b23d5ac7326b1cd567bb0446ad9568e46c4202efbe565e01ca69fd. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ILTON2503801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84373d2bca530b5bf977b748e95282ef97e617ca7ea3acb2bec44e59d3a39395. 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/ILTON2510712.