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 0x607208ec1fd450eb4808b1ee8a1b843f9dbf1ab554d7e24a828b4e4a928d0fcb. 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/8ea3f9d6-1a15-40fb-a2e2-ca83b8ae7034.json and https://artists.proofprofile.net/proofs/artist/8ea3f9d6-1a15-40fb-a2e2-ca83b8ae7034.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 0x5ce3f03421029f403a8dc67b630820579c5faf781e9bf4ff58d2de291d306549. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/BR03D2101488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638c95b46955c2e3d5d99806668ba341c43388638aac1f79e31d2e3e5c043142. 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/BRMRX1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee49a042ba0d27fe59453abbce638bffbbb63a8347974d2fbca88154b3d3326. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/BRMRX1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850e3959914d6e0d407aa5c06325760ea3095304764d687e151565e3fd28b885. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/BRMRX1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b56faa5aa2e768b8b4bc030f10e5de57df7f5ec9db336eec3645f3ca7c6ffdf. 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/BRMRX1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc927715f5ddbe220ec0d33aedb63375d80a419f53660bf9b5d2deb1cc461637f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRMRX1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf7b411c6f3790fc4e018ebceb56b2dfd70dc380877b14f024eff0ef3c7de77. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/BRMRX1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49f738099b9693d75a44250db0bd3790c81e4dff388f129f6046db52c931610. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BRMRX1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55370876187a74b297a574a57ec53f68965c8330dbd1dfc48104d9ebbe43c9e7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRMRX1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe424cd424a5742ead97dcfafc4850fcd2e7aea458d0106675badd56d277effb5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRMRX1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04db9739ec076785f9365a9c389b1db56d8c47fe8e3887fc03a35a951f6b5f0a. 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/BRMRX1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc6bce99611629474bb7dfa9a67903df0bc83614610d1ac60a986c7ae945fa6. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/BRMRX1500012.
Márcio de Camillo Canta Geraldo Roca (Ao Vivo)
Mpb Brazil: Brazil, Samba, Bossa Nova And Beyond / A Nova Canção Brasileira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0397f5d4914a66fa6d6efed764e4ada0f8732a3fefd808cb06ba82bb6acfa94. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRTRB1300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dac6ca20ebd5e5bd64e437b8e84d4feee694821a30098ab1533859852df59d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BRMRX0600007.