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 0x10532fb392768b683db766dc413af9a47aceee308d162f0461434a3cfacf3f55. 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/e4452e9a-ae2e-4c5c-b302-6aaadb535106.json and https://artists.proofprofile.net/proofs/artist/e4452e9a-ae2e-4c5c-b302-6aaadb535106.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 0x8911bccd9300fd50681544044448844daf62a3f2e04ac99d307d82f678bfdd82. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/NOWAT2101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08d604629675c3feb9b2fcdd69bb104f91cf38dabcbd77fadd85c50feaf105a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/NOWAT2101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe4ad78d2f3fc65267e5903c77c66853aed9b478cf63d5d831d7eeef4e3b37d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NOWAT2101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4086b1eec71d8fcf664baa7597b576571e881d22cc663f9101bd54e81c4899d8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NOWAT2101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4323fb4b99ea4d7e2013d9d2cfbc32dc300f4ce0353971db3ed01e89b45967a0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NOWAT2101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fd52d53d68d30d8d3573351cc2055708a68864f3247feb310b486337f0dfc6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAS2147652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4070cd90b757033c25a5c3109a930bf37b79863e2c5d34b6ca4870b52199ede. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NOFEL2301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6107621324ddac9696d490b63994f84862e1d720c358dac93bbe29e9387efcec. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NOFEL2301100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4995636dc51c617da84fd7bd1647ba45e00a20176be63a6159624bae5ff8a3d9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NOFEL2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57574a6ea93a860e0c7c438461d67a0649feaf6b69622e6219819b96027a461. 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/NOFEL2501140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7353e8586ed56c9039313125a4e14023deffe9a2d9d76e5fd610b044789538b3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NOFEL2501150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611ba8df0392d884731f7ac9e3dc7df985fcfa3fef0145ce08901bfa981c6576. 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/NOFEL2501160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ebef0da78fc9b637d399d6e7f07ba88bc2e6648ae092c439e27ac05e28416b. 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/NOFEL2501170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d022f36675561cf8ba499c1f77d40bc446d445f6e8c75230740206874b9e341. 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/NOFEL2501180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3496523713c005e530af811e29853abb5998aafd20e75e5cd55221513526c831. 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/NOFEL2501190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36768b879fcdc689cc809b4e20efb4fd9e4a9a1e26f39e97c88bbc5a9b64ee9f. 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/NOFEL2501200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b88df7c9915e36b8bb9844e7f83ec51ad44a5659259022d97d50d1bf4f7f45. 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/NOFEL2501210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c073b85ae5b5cbeb8b8196ebcbb836613912ab88c59dc7339a0cff60b110b45. 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/NOFEL2501220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae134014692cf69b3cebdc56114d2959b40c8debca8389c82ce73600ee5c2b8. 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/NOFEL2501230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef9b9011f7ae31d2ee2835123a32d0749ab230fc0655747613807ed96c3c2e3. 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/NOFEL2501240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4525087319040b468762d8a1fa257087117a33b772820f92b560f203cfa6e94a. 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/NOFEL2501250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a8934e5505c170d579eed1b96997374f2bffac7136ae4b842520d79f8ed198. 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/NOFEL2501260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902d0a81ef35f0b7ae5718298f73d4bff3a7bb002b1b783ac68f99f851e8c1a5. 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/NOWAT2205060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80e8c247fbea00e295a154038fd1f1ab6c1ead0b8be46ac640a1d8d3f239571. 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/NOJ2R2306060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ee2c4d1c080d7a5327fcf88ea7213230c5f4e614a0d501923d769418de02f6. 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/NOWAT2201110.
Eliud Kipchoge Ekte Spiller Mix av Øyvind Morken
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ffd36edfe87990b894840471ee1b309326c93d1774fc8a438da2ae705d0077. 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/NOFEL2401130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595a9dcc7f972a2f8d07285c98579d4130ac7a28db47991180191ade274591dc. 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/NOCKK2105100.