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 0x15d20d133d53544aa0e302d8dc3c93028cbb26334fee3cfcee9f219cbfff16cf. 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/25ffe37b-89bc-4729-b683-76f1466dd268.json and https://artists.proofprofile.net/proofs/artist/25ffe37b-89bc-4729-b683-76f1466dd268.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 0x7785b757d17b79855eb4fbd52133a014ff6d72af24e2ee1cdf6e09d8dc919ebf. 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/FRX762148519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c3b6e6635884869fb26338d7df097ff03bc0ee41e208204282e33c738dac53. 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/FRX762148520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc81a8ef0592355180a8ffc23b385b8e1789e5ba6241b5b6cfa03ed38d25e8b1. 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/FRX762148521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7d15f1984cedf847cea14f804568cb913875e9f4577575d7585b75602036d6. 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/FRX762148522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e8a4c812745e29d26c07eb089a4661839c935c13797d5c82beb52c0588b144. 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/FRX762148523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8a791bab60be169594bc87a01fdfbc6ea6a24442a4159024a6f6ced0cc1fbc. 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/FRX762148524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0b5a7dc38747e8c13dac4c956adbffdf296f13901cd29528addede1e465d04. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX762148525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1a11d05a6aef76fbb47459a68f95cf9d0f70130d1228efccec59e487d9d171. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX762148526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c3a781896862d47a1239adeac589ab860e6f264fe6819586f5210514b76eee. 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/TWCC32417106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb87de02d867e9639fcfd8ebf7807130500e5f85e6416900e6b3a7a1d9faef3. 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/TWCC32414171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa575cba4d09f837dfa5ba18841b456579f58ef8442d0170d3074616f2303e62a. 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/TWAE32402369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cab1cf96dc5caa9aaa57ead80265ea75499606aaebc760c32fc1c023036858. 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/TWCC32402637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48251661db58d77f2a808a6a402216811630a885d4d1ceda3fa9bf0aaa24e432. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TWCC32400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ca693d7e54f2195a2285550c7fedd524621636402c1bbdd44e1003dda7ec4d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TWCC32321424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4afa3a4ff61e8d6df544cc080fd8e7c51963f46a9ac2661519675954e605a4c. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/TWCC32321458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e191f8d077f0e3394e103d7ed5b2db5cb114b63d35de7e45322474fb35ab39. 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/TWCC32321459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43c2a2fa3a7335921ec660c9dcaf54d4def229b160813bd39738e3c83f2b648. 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/TWCC32321460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04144593abc39c6edba6cae9b56b6a787ba259cce888affdf299316f48ebe1c5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWCC32321476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2203946f3bce461ebb27654d45446fc9b2650ea0d89390aa2b3b81437512202. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TWCC32321492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e3877e49850a644d60ff236e8d3d482ae40b3bfade02f3b7978c7518433cb9. 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/TWAE32302656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3c83de90f207c97f05de0c852d27d465b97717027a1bf7e4fec5866222f92c. 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/TWCC32319855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1886e7d91223f8ac4671571aaba090ae4360a559db8dc942576488fdbcc16e. 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/TWCC32319856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337d3ae047bc2ca802b07e85313a3db7cf2685cf5162877687dc20087fd7ce43. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWCC32319857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccf19c6e8b7ecc4e301bd8b88339f7c05dc8bfc3b8e56ce227b184c93d77539. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TWCC32319858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625feaf70e21922a053d5f9c12fcc803a21436a740b456c9690be004930229a0. 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/TWCC32211046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5df6de2431e6986066020b26a02b853dc7cf1378f76ace7167eae718d5c9caa. 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/TWCC32206291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b9616239e18e617a1c04b3c673fe8b40851cfe8f05dba014dc7fc894972852. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TWCC32203702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc233eabf08f23165eb344d6376574e0a4064f855d289a52555fb2327adbc5245. 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/TWCC32201958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb97ce00dcdae7f8130fa363c8715f687dc9f09beea28059e3ff6bd52bf36e0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TWCC32200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb142ea1919c4c5cf885d40be6f5aa4971c2b302f3ec38c79da2f1023fab62e80. 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/TWCC32120826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98581425c592bac0babc9e9a5ed7627572681fa8a87c2055f123dbaacee1a72. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TWCC32110121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130f9e2ceb35e35bf50e51bea7a7e51f5cb742b9c532fb8bb34eb8d0b4efebbb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TWCC32109198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fde6e726b8b3c29708883ee379c84309844e18e22ab3108c88ecdcd987e98e4. 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/TWCC32108516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7ec210ade55368c50d50f89f25c4ec3b972465631ae635addb2867d5e3cbb7. 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/TWCC32107283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cd3650ae47abb5071d1a347a86f4c50fa4bddbce8dfea9003b48d9b91e94f8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TWCC32107120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d27dfab8e61706b8a31d27eff6f02c339d5643570c93ea9596e1afd552094bf. 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/TWAE32202152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097a11c45ee483dc0ba202af46d1bb9337642438b363a1074391317e47066728. 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/TWAE32302678.