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 0xb61f54744199fe3fcc341f935b5707c03dc9524f46b0b03cda26996115a93296. 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/6204ee15-bf27-498e-9712-1edcc03a566b.json and https://artists.proofprofile.net/proofs/artist/6204ee15-bf27-498e-9712-1edcc03a566b.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 0xcb1d26f0942478f92f6500a85580e993a70532fa0da32cce67370401f36a4fe4. 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/BRB580900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e56ad4f028b5ced476086890d598ef9f01dd5d39ca8b5e29ab87fd62b484a9f. 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/BRB580800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760147053a7a9ddba5db86adaffc9d7036680d1054db7176da13031ae5e1df46. 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/BRB580700258.
Bossa Lounge Brasil, Vol. 3 (Bossa Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2779767ff9a00db99d80fd43ecb086c0d3f91d40c8254b7c2694481b4d9b15c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRB580800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa1d87a87ca1cb8d7e01494714b7b49bd2df7b00ac3c83b03b28bb850c36ea1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRB580700103.
Knockin' on Heaven's Door - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5157014a5c517ae1646021e13d2cec405cbe3872e13da50e7872602c444f176. 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/BR3441300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3879086c74bc35060e03f70813448146397fd64e06070dee8cd5ee8b38ea69cc. 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/BR3441300005.
Cafe Bossa Brazil Vol. 3: Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99fa2cb4de3c7e5bb7f667a5b260e6295eeee666910427592ad1cdad594d239. 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/BRB580800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5b928cf0d2af39dc7b1dd4c2f5015f53a75c659a15abb1fbf88ad20a427a23. 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/BRB580900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99fa2cb4de3c7e5bb7f667a5b260e6295eeee666910427592ad1cdad594d239. 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/BRB580800005.
Bossa Lounge Brasil, Vol. 10 (Bossa Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf955446aa97642547930e57aaac5a4078a53353a380ec37ccdaf8b50fcf515a8. 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/BRB580900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5157014a5c517ae1646021e13d2cec405cbe3872e13da50e7872602c444f176. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR3441300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1d26f0942478f92f6500a85580e993a70532fa0da32cce67370401f36a4fe4. 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/BRB580900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22e9bdc1e5d8add9f50370ce75af377864d62d3a2006a86e787771890ebbb99. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BR3441300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760147053a7a9ddba5db86adaffc9d7036680d1054db7176da13031ae5e1df46. 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/BRB580700258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e56ad4f028b5ced476086890d598ef9f01dd5d39ca8b5e29ab87fd62b484a9f. 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/BRB580800096.