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 0xf2b5c4579e54f86d33ad878a814072531f2d88df9c16d36bac7dafdcb7548dfb. 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/2128f81e-cb21-4ee5-aefd-c59e0f557e7d.json and https://artists.proofprofile.net/proofs/artist/2128f81e-cb21-4ee5-aefd-c59e0f557e7d.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 0x7386022e681d4a17384f18c0e0d86a6255bfb5dc8a4f8bbb281ff6bdcbbdb9a3. 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/TCADN1819826.
One Love (NaNaNa) [feat. Los Emigrantes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7bdf655509b20c87525d2c2bf6d78784cbd3aef64bb507bcb0263d28a6c4e1. 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/TCADN1819827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4872dc5c1345e17c48d46d3f2e224fabca715a506605aaa16811b3fe5e0e1eb4. 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/TCADN1819830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dae9b7f5dff8d2f92a17b9cf40b7e8cbe7ebe278c9effaaabcee703cda6a2e. 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/TCADN1819833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96003750b79b455b3c316badab4ebc789671dd4d058fecd1b5d2d02bc3cebed9. 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/TCADN1819842.
Pensando En Ti (feat. Servando Y Florentino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f6dcec4caf7895ad590abb30d6c1bc3506a2284827e4f27905a4d76d3f2362. 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/TCABQ1378106.
Pensando En Ti (Version Salsa) [feat. Servando Y Florentino]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3627483f57652dca9642be7f1c535ea2a8100192f76c10dcd05fbbb5bce765. 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/TCABQ1378108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c1bb5ea689fa9cf70c90fb499177267076b736be711d0f71ff3ff2d2920fb9. 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/UKU932400661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c260c5bd0878b221a9cffd9519ad3884e5f5621e3f6badd066171d1db7f5c6. 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/TCAHU2439261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2a090cc4173fc2b41c14903ec8eb310968f082b05c62526b252c18f0e301d2. 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/TCAHG2331053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76039bd6dde7f27d7cc7c744eb61d7784ec66d2c868895c6029b9d64f51e8076. 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/TCAGR2207239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200c667295cab5a0d3b85f2bd91a5213efe9610a43a6c16152f5f68b94d65ce8. 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/TCAGG2209511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e72024d34a12f0b0633956eb225a6eb7e0b75eb3710af69227ed75ed35cddb. 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/QZHN52253011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8102ccefa7d62b972aa7dd9f84c24460e1269f8f1b22d96f063952e1945de936. 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/TCAGC2297350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04fc7881e96ac4166009a28f9dfff6947064ca85d134fe74b75a12984d2fc1c. 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/TCAFD2069714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc330767d3bd8923161e75becd733ec45f779e02d9c67f6941af8e8d25025b6. 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/TCAFD2069172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f1e645a98432c7caf12ba83b3824a26277827a1af06e4ceeb7da73eab8fbad. 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/TCAEZ2087005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051520d8b297ae984fbe8719a0c0f5063768366697e5df37d8601d6c39320e6b. 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/TCAET2055626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d7836250db0c8f275682a993f5d1d1841ebd7e7143f0859cc0323a0dcd9f30. 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/TCAEQ2032929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c3b93c5a91dc7414c175807ac44bcaa320c6c7c7b7b3d3502f9c4644ae5e3b. 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/QZHNB1932470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0aabb2fd8f75be9b15c2443b9f47793b60c0104d06fb39c2f4b9b2e97de308c. 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/TCAED1940355.