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 0x6d85c2c8358dbc59aa48025355bb516dc9f49523d594a1641d59391e98ca519c. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6b4ee6e-b4a5-443a-8cc6-4aa4c5cc8326.json and https://artists.proofprofile.net/proofs/artist/e6b4ee6e-b4a5-443a-8cc6-4aa4c5cc8326.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 0x74e53786fc6a6c786028dd3178c927a1e3759287db2161ff184a48ea23161272. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCENA2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa937e85575f06524c8a1b4b59c9e1993fa7bb0fbf344854cae53b45eb25fd4e8. 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/BKGFL2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e59f74d0f06ff52b780781744f614fdb2be93a37ca81fd2b0d7dadf5eb9ed97. 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/BKGFL2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c1a944d2c0c45ddadf2d73fda3be783adcb294faffa463334a97f7463ec057. 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/BC9II2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726028f813b01cd778dcec0a23bf585d23f30ec1eb26f2ee6d3c7967ac836629. 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/BKGFL2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48621f0c46716d49215087afc937e6dba849bae7ce663db02ac2d8a9c8e27057. 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/BKGFL2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aedafdd05c327c5f341953fc8058d1c32c1df43793c1f4171445c1b7088f4f. 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/BKGFL2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d7c6a5af2ac89116383e96821ba40535872b4c93a4968881c0213ff6724afa. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BKGFL2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4edc0172b1a074fc0bac99baf8f38cef7b119c7945c405b692837edf5e13b2. 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/BKGFL2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dd32333e7d729a56460377f7a09a41699b0c611af2f2e0cc2e063177224379. 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/BKGFL2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacbca864c0cb973d81f6a5ef3a448266d860172427c6676b5076850a3a6d50e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BKGFL2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3615ba4c2eb11efd3b954cee149ed4e3de2ea35d08c21de1f217793c07d7e951. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BKGFL2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91a4923dfdbf71830c5020d0c0c9ea66959f94565a49b99d07557637c0b755d. 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/BKGFL2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d08428ce728882c2e17932e442df71b08941cbbc25464de8a0357f24c070c57. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BKGFL2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0fb673498b0a46da54fa2411b3593d440fc43a0a1a83b6dd23d9caf4cd0f5a. 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/BKGFL2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697685d4907f3179b70a5dfe46512105235151cedff36253dc652f1d2c6ff13c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BKGFL2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa937e85575f06524c8a1b4b59c9e1993fa7bb0fbf344854cae53b45eb25fd4e8. 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/BKGFL2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e59f74d0f06ff52b780781744f614fdb2be93a37ca81fd2b0d7dadf5eb9ed97. 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/BKGFL2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de90abc83e2dc2c6fc3be805e1bf0d3ecb98b5820f4426ca83e7feb4ea9c253. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BKGFL2400016.
Aluno Nota Dez Não Precisa De Aula Extra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d0af8eac085419c20d6c3d32c4762ec7a3d8824136bb19cf8365e1db302388. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BC9II2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeef9c2426e3e2cf99d7f5525c2307a60139ecd147038bf0a11c57d08442d93b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BRUM72201387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020ca84f1aedd06407d6e15d9e9549a93d21df0c11db25633b58321971613f59. 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/BRUM72201390.