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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed932da60eba5d7dc39484bbce0db70213b35cc52488a3f68cce120fbc33f876. 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/d31641e0-31cd-43c8-bc1f-61bb35d40d6f.json and https://artists.proofprofile.net/proofs/artist/d31641e0-31cd-43c8-bc1f-61bb35d40d6f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd866e37d6da416a1d849c9084965c2197c69809bca3f2e8f93c30a4cae88b. 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/USANG2248869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa50abe7ab48faeeded0507473ede22f5e852f18ba09c466ba0d2e007e6ee567. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USANG2210269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e4c334c90dba23fedcd6ee202c832c6942ab1eba0693283a12fd03f7b07ea9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USANG2210309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820d73fd9bce486c0a6c574e4379964f556df20cd78000522d4ee860f6965d85. 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/USANG2210312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d89e876e5460682bd3bfee58f45f3eb0f1a7fee97a7ad19b1379bccd16edaf7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USANG2210281.
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 0x56ac06b9f7042a7328e07f8fced97344a172085d481552fae0b7607a7b6e79e6. 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/USANG2210304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8463117f6b7240969e2ff93c94661b4353ba38603228be515deb125ce10dcd74. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USANG2210289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3fd690e0cc88c30c7b33d2ae65c87904724e6ff84775c5fb514b16e32cb9df. 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/QM3DF2147047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ddf6dc4b1d8161624a3db6782bd4c282f8609c7e0aade44704672f6f4371bf. 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/QM3DF2147048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5998ea27b7742596c2ec09081a5bc0076d8603a0099995c9b23ce0f99be6487. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM3DF2147051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc534ee66ac2f024e972ed7fea98385d0c7269662993ee2e86759d2d3f913295f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3DF2147052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d4c36023389d37e990ec7b9ba18986977ce23a49e9f2225ca34100310569cc. 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/QM3DF2147067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba99cef4592f358e0bee9fa87bf0504d29e46d9681d75ebd252b8b08a229fe0. 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/QM3DF2147069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f65acfb478f8fcdc59b0600187af136bd7fdef1ec1f83938f0443d2f04e9d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM3DF2147074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc41bec369066b0a877d42e37102e835b032056aff5452aec3bab56081643d6c. 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/QM3DF2147077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ca766a15b2530e55c25ff23d2f68b93be649d764a0b6178269507532b2ff8a. 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/QM3DF2147078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b4f2cd1aa8598776bee2f28af243ca0b34dc69c625de4cdd0c9f3a275a5899. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3DF2147079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3261b67e000b821fcbac535239ea06ab33f8b6c62f8468c2112315d0c86640. 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/QM3DF2147085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376197888f5f93f0658c28101bde42c9f1896cd8e6e088ae44e91ba66ee558aa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM3DF2147086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540102fbcfc4c11d7791912af1879f000593fa66f901a63e58fe48b9edc0543d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3DF2147087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63049c57bbe511e9a430ca80b098595e692933a87c167bf4e5a41929b620e59c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM3DF2147088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dcf927ccfe9fed631cd05b43a98fa605cefc255b562220a51ded8be23b7e57. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QM3DF2147046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd286cca38dfbb2a84787cfbad7111127d338336ee352de8c1ea6db382606c98e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QM3DF2147054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae48aacde909199ff80172dbeedd399e9fcb009e1992c819e1d6c36b469c7c5. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM3DF2147057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3820e7058001008578bd03808cabd86da194fc4317c2d42e9dbcf54bc22ed79b. 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/QM3DF2147065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d28cfa7659a31149ebb501d0fe1205195687c922297a45a6657cc199878bf9b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM3DF2147071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd634b5b21b960d3a902b134f13cfa6da6d4d4552fbdb1fcc554671d11fc3cee7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM3DF2147081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdb20dc2870d8b2d0ff96fe93bc859010f1ccd3eb41c95aa53f2f7a9890d90d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM3DF2147095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356a0ddb51c587ef76e657ba5ada66d7db31f58c995908e355ff656395a369f1. 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/USANG2210237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408cc5e5980e5e9ab0563c704d44e77eb8dde4a5476c9717d035aea1afda0662. 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/USANG2210246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b0965122ac02b62906c3b5115e706ebab4a2734c66b1f9e1c8a2693f11b42a. 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/USANG2210251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b2a021500a1e073cecc17f104929cc4a28f9ee3127f86b5b227e078c48d797. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/USANG2210256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927c00a6f62b51a52117d843c4c09706bc53d015c0767bb378c1eedb81dadb0c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USANG2210260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3751d6763a4fcb4ceb3f482f43e5619d8c6a8709dc184ece680de559f14d7e62. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USANG2210267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb3c53890f30ab6b85143666b046a9790bb1bb48fca6940bbab31d17d6d3712. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USANG2210242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0540b04cdeb5648a8a2dabdc8d48b46020d72b0deef295e6fe893cd09607fcf7. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USANG2210248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca761eb0cfe5a754aa51ca179292bdb97662cb88bf3c56982d783ada555d85c3. 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/USANG2210290.