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 0x62ef949e1121949647c2de06891e917ad9d0f4135be01619729eecc80c5f138b. 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/0734218a-4ea8-44d3-ae28-99552f4c45dc.json and https://artists.proofprofile.net/proofs/artist/0734218a-4ea8-44d3-ae28-99552f4c45dc.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 0x3eaddcd70e24d7cb7773eab6ea3295903ffaa6d62e9b770cabd6bc90d9141c3e. 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/CA5KR2199540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb6065c6db63f03ed8f4297ec186f27fbdcb0a7489cb45e99c2b863459bf238. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CA5KR2194948.
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 0x45e24157ba1ec2c6cd6caaeeafea77d2aab0ca717b08de3db2baa0ab042b2e3f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CA5KR2199538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2a1b5255ac4ce060e22ae286e41596a895e81c77b1161f0049bfeebb154c95. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA5KR2199539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cf989b4a12618365f29f593025a91f0724392a0de763ced975415cbe9260ca. 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/CA5KR2153710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35be1514a93637797e3de9d1126b9ceee44a947b3b1a06ac979f20fd62de85bd. 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/CA5KR2153713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c801a0e4941cd5a66c7064a29cec127a66a8af146faaa2051d6215a6dfc96f. 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/CA5KR2153716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64abde8ad19847842368a40610ccd87aafb233bc7717fca81a7d13644db799e9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA5KR2114022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d50207043d68ee03207c16ec25b0c1420f242bab6f9da54c465d38f5730647e. 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/CA5KR2114027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598d5f4c1827fd2dcb393d1d13ad7767980513fb7efd1b05592affffbe6afd87. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/CA5KR2114033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb36c4808161988c0977d66d8792e2cc50473498c8acc1304ff62804cc03a1c6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CA5KR2114023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598c3d2cddc555c72d6eae5ed102abc9a11fecd8e3085bb07581fed3cf96368e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA5KR2114025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dc66c1533bdcfd830da3bae1dfc76eb255001075f769e4b9165cc5feaf62e8. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/CA5KR2114026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5e55a0eee0c825206fc377dc7b148807f9f3bc26409fdcaf73532d700ae657. 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/CA5KR2021370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1c051748d23372574699c56cd5c354b93c05ded453ff05c1f6762d238e5868. 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/CA5KR2021371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51af39f5266769e8a836c706e83f5406b7b60b6b93dc6f4ea14fd5acbda8379d. 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/CA5KR2021372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8da185fee839aaf5c215e33a4cb495dff49e012602740fd7cab63879571ed7c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA5KR2021367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57cf0c8439795f19d18e059430a0ba4a7875249cb5e4cc9cae2954e67bdf788. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CA5KR2021373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4d77be0b6414d0f7e73ea6aa7acf2d020407f8f01c938ea00e9ad10b644d1d. 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/CA5KR2082156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfceee437d7da9ae2018c370909ddd2f29baccff7e67e0284b9925803134ee33. 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/CA5KR2072412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5061af35284260a0c3220475b4913d9019c8efc51f98ce6c79b17e9d969b8b61. 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/CA5KR1972758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaacc530054e52182697f732b5f36f0a09a82d250300b1ebffa379c2e4a80a2. 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/USUG12207798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea6e5a5936cdb0ac8c5b671871f5dcb9ea8a00fea902c087a4730510be32641. 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/USUG12002441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea6e5a5936cdb0ac8c5b671871f5dcb9ea8a00fea902c087a4730510be32641. 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/USUG12002441.