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 0xaada8d64508871dd397c5112723e5ccac7d78f9e773d60d62d1ed62b6fd2ac79. 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/e6d67d24-a510-4aed-8af7-a3f49ff0eed5.json and https://artists.proofprofile.net/proofs/artist/e6d67d24-a510-4aed-8af7-a3f49ff0eed5.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 0x68dbef45dc6c28803dc0a631980557abdd59419de0b7b1a7d236a93d1fc455d0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/NLHR22370020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebae220ff957b8eefd78c9f2977c7d685fd7bd606347944e518805e27bbf941. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLHR22370021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03037a6b48440934f462465d18c4a9d2d4196a24c69efcace54d520c6004ef38. 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/NLD322100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4525bc6f643eb4f14384fe566a49a926cb6efc009457bb916b2a4e62fcfa84. 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/BXNGH2400003.
De Todos Os Amores - Dre Guazzelli Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d19742a071b5728ed239c5a62ac2441d7c2fbc77d8afcdf1d380521035a5b2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRUM72200477.
De Todos Os Amores (Dre Guazzelli Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d19742a071b5728ed239c5a62ac2441d7c2fbc77d8afcdf1d380521035a5b2. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BRUM72200477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7673aed2a907a603cef8c22b7166043cb5e7d66fb620c6558a396b52d005aa88. 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/GBKQU2430251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43434cb08da2bd10d8207e208222149ab7d47570d80a0cb5fac489abed9e09c. 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/GBKQU2430252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551acd88633e0587370afe3e56e06aa20c3589568ffae0a638be3cbaa2322981. 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/CH3132318156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58847d955df96a0219a9cfbf0fdc8c35ae599b9bbf50cdfd9393bcea4f97de51. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/CH3132318247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a657b68fd4c5f6c920d4caa7c75951d1bc5ca8b95b7eb0c6bb0e9e57aa00a0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEXO32301753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46feb00df269de218073e1b2fe2839fc272cbbc43c90d74f2ad23ce67de3ed2. 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/NLHR22370018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce865ebffc4bc947d82ba75de2dac0b2f63838d86b0209b06eed31a1ae0b78fc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLHR22200617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ef26efe9717d0b93637a61a8cd08d44f7f87d2f5ea8ea885c4326e65eb98df. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/NLHR22200618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a067b24e32c71459bdaa99728ac6e4b6bf9bd3181ba42e6959b583d242b30e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/NLHR22200334.