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 0xf2bd4c89b8a294c7369facc28057d5058d00a21871e6403417d15784e64bbeb4. 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/a2cfc7d5-129a-406d-afa9-72d9b75a2047.json and https://artists.proofprofile.net/proofs/artist/a2cfc7d5-129a-406d-afa9-72d9b75a2047.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 0xa84f9f2e1e7061933cc2a5744a4c0c32d8c268439ff85671f40184b693f3e6a5. 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/BCVV82300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd05537a510f3938cee9e2b248f8d271c9f4d4c0739523de1827ea6bc3dfe3b. 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/BC29Q2300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf70374bd67bd1f16cc350ec0e37609c328a8776d18ba254e37b8104bd2724a1. 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/BCVV82300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b2c0bc200b33626246e30b13d342ed53f222e92ee74e1cf78a5f7077f68f62. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BX92R1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a340d51748428e795e198bd93b0920f2e39f8711836fa75fb6942986910aa. 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/BX92R1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78e5689d6541d7233960430351db5bf5dbc4a8c4477826e374918c2a29306ab. 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/BRSME2101066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1b8d8a196f5a3ebca9721cacbf8191d7a81e0df8a69487d07c301682124bb1. 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/BCVV82000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c0e52d7bf71cb2934f8f06547c9a505226a4d3b7f3c3aae584ba48f0f45804. 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/BRSME2201710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a7cc8e3681d9e89ae9a29f48d893c949991208b176c13ac41e1c2c8bd3636. 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/BCVV82000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1fe72d95280275a38d3b604f0bb5f62b275684cccf42219b55a4f3a0057522. 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/BCVV82000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3a4ff0225d85ee62580555601948861f197eac6887049f6f0b9f6e3600c5d0. 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/BCVV82000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99d990d67993a1f6ab1981bba79a875dadb01451d08b0bcb47c4cb6ef1ee0cd. 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/BCVV82000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1adde29844e2d568f349462de896ea05c780c1ebca3db3bbc0f479cabf9159. 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/BXBMG2300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a340d51748428e795e198bd93b0920f2e39f8711836fa75fb6942986910aa. Chain 2 (Bitcoin): anchored in block 957034 (2026-07-07T11:52:37Z), 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/BX92R1900002.
Haja Colírio (feat. Hugo & Guilherme) - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3461d4601c55e7b30504a87af308f8cded28ed00c4f15edc97eb37baab634ee9. 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/BCVV82000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1b8d8a196f5a3ebca9721cacbf8191d7a81e0df8a69487d07c301682124bb1. 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/BCVV82000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa379b9e5f1b8d636f834ebff132360752d252686e1dd9e34b0d009022cd96727. 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/BXPX22300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99d990d67993a1f6ab1981bba79a875dadb01451d08b0bcb47c4cb6ef1ee0cd. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BCVV82000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c0e52d7bf71cb2934f8f06547c9a505226a4d3b7f3c3aae584ba48f0f45804. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/BRSME2201710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf498858fd0b4ee71f9684674c5a428ea2d8329aa64f892ad7c2a423fac0691e7. 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/BCVV82000035.