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 0x5f4a41acb564e8222c767d9087257ee60859aa58c971ecb248f148266cfd2f2d. 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/e261c1e1-6faf-43e4-ae52-305ae09a9021.json and https://artists.proofprofile.net/proofs/artist/e261c1e1-6faf-43e4-ae52-305ae09a9021.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 0xd71a831ba071258eebe456e8a05888baec547bbfd828af41fbad32d1193c3651. 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/DEE862100986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c823725c32fb4706fb6195d0e67bd8af274f41643848f501823c060236f2f37. 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/DEE862101058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5343979dc21ed34422314ce0170525bec4362a0045497bca88cead6b1a60fd6c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE862200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd08da54c506568b9a32d51d36b801d8fa235a326f3bc087bf3c6a4c4354adf4. 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/DEE862300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714702ab7d5ce507119d250ed1520a125578e3785636c20fdf04e4a28be90ecc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLFP2310376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796fafcba9fde3113f9aeb19ed83309d4c3bdfd73001f8fbde4b2e6f4703cf50. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/BK4DA2314662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73f9535a35717c011ef2ddc3b1094b7fa28ba109c5eaaff72ff58ff2bf6d6ef. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/BK4DA2319330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82069ae0877576a816b2334514fc98d3e0d768ccddcf92bd92f8b87132cbd847. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:32:26Z), 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/BK4DA2323367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796fafcba9fde3113f9aeb19ed83309d4c3bdfd73001f8fbde4b2e6f4703cf50. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BK4DA2314662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b95cd1f62ea9a473c5590a574049b01b8519a17d0cb8e1ff670d26a7734a9e. 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/BK4DA2414406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82069ae0877576a816b2334514fc98d3e0d768ccddcf92bd92f8b87132cbd847. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:31:42Z), 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/BK4DA2323367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81497a90ef0d2f4b97763092c9c3fcc61f9b69c8a8a32e07451b1b527498c16a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BK4DA2414408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bc3e91f6d5ce35a998b861ed9f192abdc69b3973d33b71004901c1cb8ba62d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BK4DA2414407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73f9535a35717c011ef2ddc3b1094b7fa28ba109c5eaaff72ff58ff2bf6d6ef. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/BK4DA2319330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19a3561839a16c4eaaed5fffc0bf6c3d6bc5eee28e8389088339bb415c46ff0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/BK4DA2414405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83e3f6c4a928254e37efcbfe377b06dcce5e9e509948d28f35e7b57cdce4b9a. 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/DEE862200768.
No Hard Feelings (feat. ALOTT, Anna Grey, Averro, Dario Rodriguez, HBz, Leony, NOØN, Sofía Martín, The Holy Santa Barbara, Tiscore & Y3LLO KOALA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1ae6eab81df1dc04c72d0612cd5956c8d572f6a5a8f15b6d8b606b3829a3eb. 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/DEKF22200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf473609bf140663acb11cdab5b0cd742c13d0e3c4f3f5764edfb0bc1272283a3. 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/DEE862100723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0340beccfe2584c2cdec40ba0802e08c18dafccc8c8100cfe76acb7e893d7002. 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/PTUM72400022.