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 0x0e4f2926456c488ff5ba38e9a5c665b12a301c3ff0fdc304448aa81a0c268491. 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/dccc613c-f620-410f-982d-48f17fb2b91e.json and https://artists.proofprofile.net/proofs/artist/dccc613c-f620-410f-982d-48f17fb2b91e.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 0x8629318015598090c6a909ee14cfe8952521aefdc01ac2558d7b1d0d1446e0d7. 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/NOUM72200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d90c0303af4276edbf7f1af7d04b875e841dd7ede814cd18efd515bbb819b10. 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/NO2DY2200395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c18479ef2f3feb50ed4cbe7cbde376a1b84c19765fac6ca9d11a9b14c59197. 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/TCAFQ2196489.
Hold Kjeft (Når Gutta Mine Pilser) [Club Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644ebce0592f0029b5faa0f2524b87b803b19685182407676e72c57b8aa52aa1. 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/TCAIT2446754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16b1bd2047dec66ed3e838f3426bbf7858a8565e1bfc68ab1d88d212eb46ef0. 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/QZHNC2455983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2414c733ef95e21f0bea190063f26751c43315ddd74c0d00da6748803e488fa. 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/TCAIE2405194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9c56eb5e4bef49a210af845885bbb3b01a77f6477c68e154ca863c91e741ef. 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/TCAHA2341504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b93fcabec20e6537d1a2a66bdeeb990296f8c59beba00b097efc5afa680a09. 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/TCAGW2358228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2a18bd19b4781fdd1a39f41ee4c118895c16359853b3a8a3fd41cb6faeec21. 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/TCAGU2397361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d85cef9db19f6ff85d84822d789a44805ec9139033db75c178b89e5374a1e6e. 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/TCAGM2269113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adf71cbf34416fa4ff88816c4329622a41b83f58385e963ec1e9660622f2a34. 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/NONUQ2209010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381dd284495675ed1a878dbe6167b5b18b0466e07c3864b671b9f2ac47229db7. 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/TCAGE2265688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e0e2f583c814e08174e51e0bd06b848055ced99c33ac02b821454e84eb4bcb. 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/TCAGC2243467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5491d4f4dc4ccbdf61ed55e9ee10899ae4fcfa77cfb7c13fb06746f92b908111. 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/TCAGB2298471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c92dde080573f8aae5aff37ea02e0a7e6484f4b548e7f8023ac9ef48a2e256. 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/TCAGB2242774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fa753ddf6bd26410e2580fbe8f1c8c0a8f99b2d57ab4cfc9a9c235f5374f51. 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/GBMJG2125068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c6ed3491413c29552f867d9c27ce289d941de2fb74490235cc7a415f97ea69. 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/TCAFX2156280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4901a8ac53a0cd4327dc601c2c3533fba87e4d8d6020d02100dd2ed4087d0548. 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/TCAFW2175468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bdd442c851dfc1d2a38c9c3baad4cf65c8b28ea276fd575a3ed131502b9722. 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/TCAFP2120962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdfa4c43460d45775da1cfba5a30b74d9e67108f5d5d8e77404999bbec99441. 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/TCAFK2170030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba597f5135c1721826848d9e040825c1c379fd4b6fd8371ed9c16e7281b55b7. 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/QZNWY2027440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4dae8a5f46114f256e572c2101abcc30581dcb6ec50b60ff79152ddd7ffbc0. 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/TCAFF2046092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93b9aa1146b96552445ebd6e71f0e8bbb54053ba3f38e876ce901726cfd811d. 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/TCAFD2049132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00001c1ddf4797a107d757353fd5138efd59afbe35f2c6030f7fe3ff06eb95a3. 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/TCAEY2053939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb7fb27f9ba88eeaa8dda1c8f0b929b36b57629e1ef4e7e830d9495536dfd9d. 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/TCAEU2072309.