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 0xf0b651c31f52597e11182da23ca818362f4019334e5673dd4fbb04e3b30cb9bc. 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/37b37cc4-893b-4866-ad44-9d3be7b6b5b2.json and https://artists.proofprofile.net/proofs/artist/37b37cc4-893b-4866-ad44-9d3be7b6b5b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Luccas e Gi em: O Mundo de Magia e Fantasia
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 0x404da1dc2cdcc2fa754b021bea623e32276a109791e29874cdee8743c2bfaff0. 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/BX9312300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa6a47d32acc117c755984c71f3c9d955455752cf2c91d342eccbf129a72dd9. 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/BX9312300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24f1f92facb34ba6975e7ee617a5e95a8f7e11c6fabf1339255c8e44f729f9c. 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/BX9312300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404da1dc2cdcc2fa754b021bea623e32276a109791e29874cdee8743c2bfaff0. 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/BX9312300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc394abd7ff233e86085da394ffea94a7bf85382a62f16038b3a381dbf8fcc8b. 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/BX9312300259.
Luccas Neto em: Uma Aventura no Zoológico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b938be1194fe1de80db3e7f1289b516db7a8003bd33a3632b86d30c94cf001. 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/BX9312300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9a086d075f0391c731273c98722d29f51f4f2869b3f6adda8c565e642550e8. 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/BX9312300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa414f79f263f6c74daaccec7cef0bc53c6177695448093302aea1fd208e2c451. 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/BX9312100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968d7f253b60fe1beade18d806a1250f596424f8cb0d795be676ca1d98fd5df. 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/BX9312100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6509a73ed7fa025aba343682b13e2dddc53a19cbd084860ca9b4e0b4c368f074. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BX9312100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae8b8d520fcc6d7d1095dbfab9b1aa51bbbc91e79241e04a96ab6c524c66fca. 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/BX9312100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc54822bba75b330b7a086738f1e3a3a96272d6a4a077853aa26cc3f9f8ff376. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BX9312400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f34a833bcfb4d29788227415e6a51bb20ea7e719f79033d7c2087f647ad34e6. 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/BX9312300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1de7a1d50ce31717454f6fd49b33c948fb3666b20b92d098a619d5b6415a9. 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/BX9312300004.