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 0xc4e8b77045c963deca68865e5e9ae74b0bfcf97074ad63c150d526aa79799d1a. 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/35bbca81-bea1-43ab-9ede-8b025cf4385c.json and https://artists.proofprofile.net/proofs/artist/35bbca81-bea1-43ab-9ede-8b025cf4385c.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 0x5c14eefd6f6ccec85a6ed24ed4b5dd0004810b79cab5102352bb27fa09443896. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAAU1164683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be53c28eaa80c4543b702055aa093eb14cf221baefb0ea4c70fe1b73b3b97c0. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/TCAAU1164754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cf6b5a76ca48f696b2df82de9d3b17d82451f1be291d3e5bf25b1a289060cd. 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/TCAAU1164758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0d6810901d512105c4122cf358d14f7f6f6495928dc5a9aabe38fb0c616359. 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/TCAAX1159546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7635f0f39aee8b0e09484f4db3494311882b5134a2889fd614004d18cd9892. 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/TCAAX1159555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa170a39eeb709a8aa5707755fd16866a65462a1a191b556f5780dd1c05a8ea3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAAX1159559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ccfceaca362e5e73b8d9e7067ae506e734ecbbe6f0c91333324df8a9e61013. 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/PT6AT1400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69297485873dfbe3cd9e726de5f5c65cdf828b62d2683f286888179fc29153c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/PT6AT1400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0903caac1bf70f43bdec0620ec2bf656bc70ba0ac4216bf217789e5d8414f172. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PT6AT1400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f351870a79e61a56b87f31166ed3ba4d1cc930fec68183b27583aef5d66c054. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/PT6AT1400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279c55d4a5181041839b420d36b1a27b6658a2bad301e73d55f4e4536ab60642. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/PT6AT1400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330cf7c21a81271e2c4d627259aa9c81095d69b9f528e4de8c195885828d8530. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PT6AT1400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33beb4f91f58ac1126f5bb9ef5fa0faef36347ffee40f6f46dc0812250845202. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/PT6AT2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33beb4f91f58ac1126f5bb9ef5fa0faef36347ffee40f6f46dc0812250845202. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/PT6AT2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c69f25800845253cc2fd91a3390b5ea194809c36dd614f91726bac625e9819. 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/ES71G2500350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074b6ffdd978a70ffadfabe073aca46d6ea318169f896b2bb6baf808fa374a2d. 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/PTPK11500022.
Rua do Carmo - Aula Magna, 40 Anos Numa Noite (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9074c0ec8b36e624a9adc2bcfc2fa60c9827bbf9383a60bbaf3ee5ecade77b. 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/PT4AY2000044.