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 0x66aa70870d1c77629918dda9ffda1d9e3fad2800f362904dc06c0064332a48e3. 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/8519aeca-fab1-4fea-be83-5e561852d867.json and https://artists.proofprofile.net/proofs/artist/8519aeca-fab1-4fea-be83-5e561852d867.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 0x739b277a7e1646cbd8604f3dc14e0f72c84ba467cb9982cb457e5b4e3aab8f49. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZHZ62092224.
Seu Gostoso, Rebola e Joga (feat. Mc Ka de Paris & Dj Novinho do Jaca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa214d89ff4bdbbaba0d09d7146e9a34600104f86c65014c5676b7e562517d14a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZEQU2061335.
Seu Gostoso, Rebola e Joga (feat. Mc Ká de Paris, Dj Novinho do Jaca & DJ Lula do Jaca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58626ec130eac1a94c515b9a55baa1deb1063d31eb04a2cc0bd984d3066c6e3f. 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/QZNJV2091814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880670b9f2e73100c96947c72b1975dcaa56f74ee9034be167bd970ad8bc64aa. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BCMS22100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d35065c2098fe091ad8280b81077fe92a42ae98a5e7e03d323abb4495a6afe5. 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/BX0GW2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88958e6bd23ab36d1af55ec33968d2aa2fc046746e870234b5f53f1b065e8d6. 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/BX0GW2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632f09fed7fb78d761cf210690173bf00bdde1d8f307043b6566b4686b0822d1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKBL72400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb638380f01635517a020134a5bbfc56eeec3846e788d5aa3d9ed78647dd3ebbb. 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/BKFUX2301802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf253ba8dfaae5ff2f7fcb8108e2af0d4f7a7086d49356ef6b76308ab0758a13b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BCLWS2500740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936b1b3c645a63d194b316a0cc297eaae780a9b2374247cdd5e6b07ec87d9ce4. 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/BXQZW2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27527fbf026440acacfbd0b284378a75c03eea7032787c99c58a02dec03c4e9b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCA5Z2000032.
Hoje Nós Vai Tacar (feat. É O CAVERINHA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215881deaa4f33773f5b00e0a83ebf86e4e22a504fbcf6c57aa8bf568ece94a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BX7272400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b5b0ac6f4159c359e09e6ce25791a93dbcc0bbae80dea997d09b5534f534c5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BX7272400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee3ba4e562483ea84a37332a3366b13e6463d61344e5a6f3bfb4138fbd8e082. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZW9M2415049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0847a453c832e192e3d07cf7c0b1763ed6537574be07f69808f7f99650e1ed. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BX6IQ2000155.