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 0xa27a155b7dafb235725d5aeb3a10d3ceae08e66e6df8aa1ba1a74b3c9727df6e. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d89542f-8408-4467-a2bc-beda4357ea77.json and https://artists.proofprofile.net/proofs/artist/1d89542f-8408-4467-a2bc-beda4357ea77.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Se Me Perguntas a Mim (feat. Rui Pregal da Cunha)
Sms (feat. Katia Guerreiro & Marta Pereira da Costa)
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 0x6137c33b142b4ab05fb6b9370c1f64941fa4a935158ba2771d7ba7c7d4a66277. 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/USCGJ1665294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3248a0d93f80c898724ad98b2b5dfd90a61ee1f7fe42b66dbbcba6bf88832b92. 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/USCGJ1665296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450dabfdb2236a98a29db4fd837376eafe0622db6714d3b9921dfed8ca1bd8b8. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USCGJ1665300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2960f0c88d5942daa802f8dfd7e894992c093dc012bf36e9a3b01d3bf0403cc. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/PT3DA2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312cc471c5caa735d97b8a2dd30472e6e7d79fac4c9cdb8b26e41a4d8e0fda25. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/PT3DA2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3759184db7cfc4d4c75077ef0cc0ba68da7c645e7002fe5509f9ff4d972f685e. 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/PT1F32500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760218902bdcbdfb6f3edb8d3cce7d01e2ca8dbac1d5282f741de2c14265d70d. 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/PT1F32500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4895d4fcc805ce98a5f5a7a98b30bd4f07f9f86e4178408cf54e50173c353426. 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/PT1F32500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802769485fd7689147a8af2ba0c6c93c21b66fb6317f958bb82b6648792e95a5. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/PT8CY2000374.