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 0x3ffcc2e953f42cc8c9cc704a94dc1072874014328bf1977da6e5948a75696bf9. 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/67e707d3-7457-4d5f-8c5b-7d0c05eab0d9.json and https://artists.proofprofile.net/proofs/artist/67e707d3-7457-4d5f-8c5b-7d0c05eab0d9.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 0xb24bb6aa31f5a64df28eb141be2638590718f648c32e6ab064b974ded2a5a96c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZW9K2282600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471388cea7fbddbd74fceb1ff3ea47edab60a64c769eae716551b759b320657c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZW9N2238352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471388cea7fbddbd74fceb1ff3ea47edab60a64c769eae716551b759b320657c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZW9N2238352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7cca1f14a3eba099e6cac6bf485e247fc9333eeafc7b53c51f85a8da22cb3a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US7VG2396125.
Ouve o Meu Clamor (feat. Lukas Agustinho)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e7f751999e4a79a65e4216b95b92dc3077d31309a460bcaff27496fcd5952a. 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/QZGLM2352237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555b125efb08536193b755ad8cc36dce0037a79b75543981cdca7a337af74136. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGLS2363392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947ae2d18d78865fc9d20da3411f50724a02d06773351bd4c77764d5811c8bd7. 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/QZTPX2281844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24bb6aa31f5a64df28eb141be2638590718f648c32e6ab064b974ded2a5a96c. 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/QZW9K2282600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471388cea7fbddbd74fceb1ff3ea47edab60a64c769eae716551b759b320657c. 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/QZW9N2238352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7cca1f14a3eba099e6cac6bf485e247fc9333eeafc7b53c51f85a8da22cb3a. 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/US7VG2396125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b43cbec8f0e783d77c3ae0e81a110c19f5c75ef43ce960b87830c19fd4b43d4. 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/QZMZ92340253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555b125efb08536193b755ad8cc36dce0037a79b75543981cdca7a337af74136. 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/QZGLS2363392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947ae2d18d78865fc9d20da3411f50724a02d06773351bd4c77764d5811c8bd7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTPX2281844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7cca1f14a3eba099e6cac6bf485e247fc9333eeafc7b53c51f85a8da22cb3a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG2396125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea7010d1854a7b312108a3edfba1dc5e07a2765c0e34dbfb8528532abb25170. 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/BKG6T2400002.
Algo Novo Vindo (feat. Thiago Tavares & Vinícius Cruz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c5926dcd83f312754af7c74a27b7f9e79be24e5a794cfe6664903a5a3dd93a. 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/BKG6T2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9171c7c31c0c6806edd5487e1d5539dedaced005ad1c1878c362541623af96b2. 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/BKG6T2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea7010d1854a7b312108a3edfba1dc5e07a2765c0e34dbfb8528532abb25170. 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/BKG6T2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48174a268c4b38a30cd3d42178293e15e4b465864a974e81f708711d531c336. 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/BKG6T2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c5926dcd83f312754af7c74a27b7f9e79be24e5a794cfe6664903a5a3dd93a. 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/BKG6T2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9171c7c31c0c6806edd5487e1d5539dedaced005ad1c1878c362541623af96b2. 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/BKG6T2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b274d36dd7ce15090cd3d60b261bafc11ff40adebf822c5d03b5c957fe5d98d. 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/BKG6T2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b0f5af4155cf4e0040cea33a13bc04021c4e0ce7a0acafc993b0f911743301. 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/BKG6T2500004.