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 0x5adce320bbdd1f4011161e7b1f1bf4256e9c595a97a1308e5d437b02d0ab91c4. 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/b9f15200-1516-4525-b554-fb80f8af7e15.json and https://artists.proofprofile.net/proofs/artist/b9f15200-1516-4525-b554-fb80f8af7e15.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 0x265ae5f2df99bf7de3656f2253b1b26946e27ed34fb6c2782eb9de88e1d366c2. 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/NLT2H2400995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9d168609049f4a386c410c42a20ee47422e736a70e4307c22114732e668c40. 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/NLT2H2401076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966acf3e324ad1a1d19fcd178853bc3281c9d9143ec1f9a475bf6e00f26eada0. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/NLT2H2500433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fefa8e8565f13e3864be5599cb7a5f8dace9198ae260c3c09da6ce36553cbc. 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/BE8LH2400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3add74f955ae68cb849b16035497660a4e6ebc26ce203297fa440c17220b0b. 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/BE8LH2300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50610759c5dd323441dd69fb72a44aa15f4f0d270594c5bc786e0483ec07799. 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/DGA052365916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50f08c8fde73ef3fd2780568c14c77f0b098264fa63721518e456563eaa283f. 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/NLT2H2300756.
Summer Chill 2023 - Ibiza Chillout & Lounge
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3add74f955ae68cb849b16035497660a4e6ebc26ce203297fa440c17220b0b. 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/BE8LH2300112.
Cocktail Lounge 2023 - Apero Time Music - Summer Beach bar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3add74f955ae68cb849b16035497660a4e6ebc26ce203297fa440c17220b0b. 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/BE8LH2300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5d55c86f8a7a9dc945cbfc576d50fca6a884ac093e562e1f8dac18e09c8319. 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/BE8LH2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df22bd5dac9a508c8f1ce6bce36ababc5b4efe23c413d9c36aef030e74a8cad. 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/NLT2H2401731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb890d281a8e300fab84fb1f9f2ac4ed8f8adc6a88f4f3759860b2d0cc87e26d9. 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/NLT2H2401230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9222889abab3b136bdc9ce080aa424a49b165d806e154737e17481d5a5b8e403. 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/DGA082345618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44c959e577a46f0cf872a36c3eb3ca0b7b8d5ce70a384a6834672ce0737d6d9. 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/BE8LH2300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d818f17ab953e3b1ffc94297c8b60dce768a8b1a7ee23db5e74089a4bde74f4. 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/NLT2H2300846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cbe909b9e11bd2c6cef94ea5b554803ed5a5d8e8c377661975033b407638b2. 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/NLT2H2400886.