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 0x449391e25079f37c62a9f3e4821d26d5d07969c282fa0347ff2eb85eed7a0a7e. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ba31ccb-ed31-4092-83f0-e4e7a0c2b4da.json and https://artists.proofprofile.net/proofs/artist/3ba31ccb-ed31-4092-83f0-e4e7a0c2b4da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
João Gilberto e a Revolução da Bossa Nova (Ao Vivo)
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 0xb8bf5adc92342bfaefb10a8e0a696e1669344e59055fed06be69e56bfc04dbfc. 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/BRKUA2036203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6291a924c7f81c39074cf3b8edd4edc51c86c2f1573ef27d454355ce2c0bbfc1. 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/BRKUA2036207.
Gonzaga, Caymmi e Noel - o Sertão, O Mar e a Cidade Na Canção Popular (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d90dfe876a18e159aeaccec6a2a0af00c9b7f6e8ddadb0039f13bf6f25f294. 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/BRKUA2037508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca475ed2822299dad1a4619a2328ff44d1f0667c1c026004101471ac213b8ba2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BRKUA2036206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8349843c4f64e4352439c04dc0f0ef5859dade129e62f431037bd31f5fb7283f. 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/BRKUA2036204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0899527a3efddfc1fdb37d0e089bd15499e918c5c34792643501571d09340901. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/BRKUA2037501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca8af145025480478b1f16abe0879215730712acd23f2c4caaa944465e0937b. 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/BRKUA2037502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0247c4ea45fa38165cbd4360c89030fe0ecd4fb1e63ac03a14f3986404aba95. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRKUA2037504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7feb6b808723d8026033b347a9fa80ad976a39e3f5e68ce36e49fcd2bd8e68b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BRKUA2037506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7624aebc2e16b2648ea7aa790bc26d1113d71063b902691f012335bb41ebc41. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRKUA2037507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e4f0a5a56079f2c825cab5afb290cd8e6bad10e9d3f2c512f31d765dc80cbf. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRKUA2037509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7d996c797ae16e1c34cc5b16baf763d4fab4ae357d2024dd7e8008fe3fe107. 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/BRKUA2036201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3499434aaa7a490b7e9d8b3479acd375bda63df326b0adf49d1e538d9f086861. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BRKUA2036202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe71c952a8bfd252347721e2172aa7d1bbb09e8bcf7bb29d111ba6460689ad16. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRKUA2037505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d1ff71bedd5f97e91045c527c447f93b85cc4f903dc65fd8ad07c7f5646e8d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BRKUA2036205.
Panorama do Choro Paulistano Contemporâneo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb875bb42774af9aa1ce3d9def2a65d1c4f3d01d123466fbafbde34c72a9e4777. 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/BRYVE1000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3b2a9bc64329572f70a0e767dcc7e20ae9153990e16ba357a2a8d4cfc579bf. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRPUI2100335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fedfb134228574959356f33d90979c08698a5755fd7dfb295f24855821c8a6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRPUI2100336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c04392c11cc8a2b4d97338f69ae14bd8e286c57736ca00eeabe985d149f2ab. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BRPUI2100337.