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 0x4f1d0c8b1425b0c63cdf0fbc8b55a16b703737812be485d3c0ec469e56a89d80. 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/533a38e1-76d6-4ba8-8903-fd5a3b12d715.json and https://artists.proofprofile.net/proofs/artist/533a38e1-76d6-4ba8-8903-fd5a3b12d715.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 0xffc8dfd8eaa3b3747dde57781ed1dae5a1c3f35e0cb933a5f5b8bc8bd36285b5. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USHM81839711.
Sandy & Junior Medley: As Quatro Estações / Desperdiçou / Quando Você Passa (Turu Turu) (Turuturu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184f22ce1f2e3993d16e82793a16b1af74a54b61f8d0746d9e8e2a3caa35e12b. 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/BRTRB1993012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc140d326db42a4f91f027a00bf8411518fbad0508a0a703b8f6f9c94d8645e9. 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/BRTRB1995236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773ff034fbff674415392eb200204d46d068a8f1c0c04782a45c67ef04b3f27f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USL4Q1884775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6397d4f586a733139c2affd2d5fcbd843c055dfca4fcc48375b95cd553fb4f8. 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/BRTRB1997915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e0fe1fbb61d958bec457a0ee3e4213aaf59110c631372814e6c56a43d59919. 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/BRTRB1997916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bf91154d7caa80c30e89d2379e7f36a931d0d4a37df7b5bbeaa829b2838b80. 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/BRTRB1998022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced2c8dc9b4112a6727a8668aad49535b074aa400571bb676f7c9df923ffa969. 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/USCGH1888797.
Não Existe Amor em Sp / Esquiva da Esgrima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc8dfd8eaa3b3747dde57781ed1dae5a1c3f35e0cb933a5f5b8bc8bd36285b5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM81839711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73be74963b50429fcbbc8cefa6091a486b941440e4e5bce1400f87796d7c56dd. 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/USCGH1873053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cb2faa3b48b1176f268fb3f3dd426fb318859b23f12cb67bae1a94f77f1928. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USHM81787726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af885e29399f74a0e75e566288fe83a74065b7bec3602c26fe5549175ae922a. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/BRTRB2018670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc585be3196a5cd11308396f6c313d9fa6ff067462a4c45581b5dcab7b7c2c5a7. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/BXH892000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb483e4539af9896890ab7b2ccee50d94a1c8537884b070a69e6ad18d9d284ef. 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/BR96K2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa450033294da074e7e3f9af4edc86a814c22e2410e586c7cf3d51b743ff5814f. 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/BR96K2300001.