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 0x3ae289a16d7792bdcc843719ee85c49609fb5ea1fafe9bc1563b2d614f3aa52a. 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/98a53b2e-3ec5-4808-8b5b-129ba801bed5.json and https://artists.proofprofile.net/proofs/artist/98a53b2e-3ec5-4808-8b5b-129ba801bed5.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 0xa558378e851e5d605c74cbe21efa18ae70bbba0970ec13efb475e8e044adfe15. 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/GBSMU6667664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e76c349cfc744943e793a0876795ecb74c8bdccb4bcc470a3bd358a609904d6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GBSMU6667669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b64712a52eef6804d6eb863c62d340ceec6bb165a7e753be48a61f2cffaa1a2. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GBSMU6667672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd599bb3fa0a12db87fabb7af59cbafaebb3b5aea04637ad62c799b02ac8837e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBSMU6671017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ab474d922cacf78dde4b102364a750778441320438378731a677657acb6152. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU6671020.
Estudantina - 25 Anos de Sonho e Tradição
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fea36edfb711006049aa5955d1f7efc36e73067a6cdf9c162ca6c7e928c421. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBSMU6668494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a55e2a3679e1b09db25913252e0907d7c1112973b3bc1f84071aa59d7c573a1. 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/GBSMU6668499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb874a1592e25cbae114d8ad97640d5844d0d47ea001780a68df16749d188c798. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBSMU6668501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cd761ec30081c469f5c92cdd3ea407a89982827fdfb6e4e2599bedf054f4d6. 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/GBSMU6674636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38be1e3c10e19e07e4811481b489af48d30de171282fc32221e09bc26cc5c09. 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/GBSMU6674637.
Mudam-se os Tempos, Mudam-se as Vontades
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bfe09e3fd839ae8601bf7bd22d97c29701beadc8b5e725c57522bbe4dd6cb8. 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/GXBDT2470283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc475fddca9a0e6225cc2493f901ed6afd1255494c69e659e00f45769b7e9a2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GXBDT2466904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f1fc4ba7133612dc16275ece1521e6beda89675e61ee673d34c3c037039a09. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GXBDT2422017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72f4d47c25419ee99e2ed221020c77b0405480b1bdabc59178de6b777d849e3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USCGJ1936372.