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 0xca60129d4eb01ab29626f97c81848432c22fa497d885eee78437d95e2787c135. 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/a41476fd-4cb9-4bc1-a212-d3d5fbc2c704.json and https://artists.proofprofile.net/proofs/artist/a41476fd-4cb9-4bc1-a212-d3d5fbc2c704.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 0xf7d9c90614ab118891fb97715a535fce52d8e173fd8b2f4bc85e3711f756f811. 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/BRACT1603580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffb2bfacf6b80daf6c48f6a9acb7b8ad91814a65c7d6d5e042bfddb19a89378. 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/BRACT1603583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360dcaa646223c1d75c1fdf10492e66e82da4f2862130879cc60bd56900fee64. 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/BRACT1603586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf40b0097c61714bb20498e9d56237b9071d01378d95477a8c4503f8f6699e2f. 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/BRACT1603588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea0e85fb8ef5cd727cf99effd3fdf2339feb6310ca8dda96b1ba38f702d6f84. 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/BRACT1603592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e20c653de7b4135e9a9347161a1486fbcc496825d4037a11b2c066b599e83b3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BRACT1603593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000a0e7e5681fd5721b4faf5644cff94ee82ec81e956f830d0fbea7dff991f33. 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/BROYG2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d9585738192bb7c0fc5ced132cdd6aa7c4a0490601674b2d807d840c2461db. 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/BROYG2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d797a8fe86656faad519f7a0d0c7c351768d0a74ad7159314197dbdad06f1a8. 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/BROYG2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2825d95779710b80e45265a1dad47b1c7ec8ff622be07c76595e1e9c34a9dd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BROYG2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeadb3db35bc2b55a0320e1a77a43997360cb94c9a7604daff5e0ea13b0d8cca. 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/BROYG2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69f147228c0316b61fdec6d11c245bfab5ab3d75a0b74cd1ca208bdf96faafb. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:50:28Z), 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/BROYG2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbbfa23e5e913130f3d160a85e65a5a42d767d0438382382f826f00d1c71c6b. 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/BROYG2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef87caf02e5377e698a9ea58f349adcde4687ad7d97477853fc4cee4a7d8780. 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/BROYG2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37aadedf792d81753c6995023d4f4415ec884513749acbea871c2cefc3bfc79. 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/BROYG2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394f8090e45252a82fe0b55f731ece6c6362fe8c7cdda87293b95b1fe0f62e6b. 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/BROYG2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b929555fd73c18043e8cd06fa5e8fec5ae64ab47fcd80127fb4a883ddf6fb47. 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/BROYG2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd0af3ebdd652d9173b3f6a22a565131a10aead34bbbd597539f9549ab778d1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:46:03Z), 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/BROYG2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd036c75994b13037b3ffab3a46bd0fdc153ce43a587f0a7467927b82817dc39a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:06:35Z), 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/BROYG2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48ebc51742b63bb4bb6889bece7d32df33af6b7ae349e0701c2c565c48dd96f. 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/BROYG2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654bb45828ac66ab89b6d632e8951533002d99ab3f78643ff815a7cc2c269fb0. 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/BROYG2000011.
De Emílio & Mauro para um Destruidor de Corações