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 0x3d18a5c0c62bd1e5838c40622b9119618859da3063f39dfb94dbf7a4e74b55c1. 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/f2bfd43d-c04c-479e-9dd9-e179755486a8.json and https://artists.proofprofile.net/proofs/artist/f2bfd43d-c04c-479e-9dd9-e179755486a8.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 0x2f1d1fa46dc3e002a909be7ddf80883bb2551dacfb11b87c28034e0c55e5008b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DELJ82039162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1d1fa46dc3e002a909be7ddf80883bb2551dacfb11b87c28034e0c55e5008b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DELJ82039162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426020276f8186a3edf7dda0ca28b3f016ba7f754360e202478f80e903910f92. 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/DEZC62132764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e4804c40e1a9a54b72f0492d7dc8e4ef36940ad304674fe1ea8a81aef67b5. 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/DEZC62132765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff1e5a62ba1a5d3e7a1f84df140e19c8a69ec90685b6913fc01ee8cb8990e7f. 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/DEZC62132766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0395f0f678108fb5a05d2457a6e981316303efd1a6d0cd4a80a6d91e556dcf. 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/DEZC62132767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefaf49f0e26cb0f029e7aeead7d783c569b8a7c03f56553c63ad284a8c1131e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEZC62132768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdc807dd6614b1d920c9ec9740040cd58b8fd9c3723d82e5911257f1cc4fa12. 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/DEZC62132769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500d6ceb16a50e972ff3f024dad2dac57663c92e30eb8b8927795a9da3ee8a88. 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/DEZC62132770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b48fbce975d804e0adccfc1c86f334d9e960c98ae822c75d145483222f21658. 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/DEZC62132771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426020276f8186a3edf7dda0ca28b3f016ba7f754360e202478f80e903910f92. 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/DEZC62132764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e4804c40e1a9a54b72f0492d7dc8e4ef36940ad304674fe1ea8a81aef67b5. 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/DEZC62132765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0395f0f678108fb5a05d2457a6e981316303efd1a6d0cd4a80a6d91e556dcf. 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/DEZC62132767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefaf49f0e26cb0f029e7aeead7d783c569b8a7c03f56553c63ad284a8c1131e. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEZC62132768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500d6ceb16a50e972ff3f024dad2dac57663c92e30eb8b8927795a9da3ee8a88. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/DEZC62132770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b48fbce975d804e0adccfc1c86f334d9e960c98ae822c75d145483222f21658. 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/DEZC62132771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b7ddceba4a89e092e4c2a900080e0fb68fa653bddd8c3198abcdef0136a64. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CLA5B2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b7ddceba4a89e092e4c2a900080e0fb68fa653bddd8c3198abcdef0136a64. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CLA5B2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946fb515b9d5767e2e2e7f5e7e25644531a4b1036d4ce1c6febd26545a291c31. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ARIXB2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb077afc51354f3ae6d0d710fbb8171b05af170c83d796121f1397e03e4671d1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNJW2195596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18abb7a6d3f729fa076d654fad24db78acac708f8604ec595a19e34e05b6c00a. 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/USL4R2122317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa637bda0c22bcd181bc42feda5aa4705a5c421bce73589f8518c12c92308b3e. 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/QZGLM2111443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde0774864fd028457f834f3a99abdd8f50855701fd6387c5a1ae4a5386a0411. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM6P42472813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea65d680e9fc2351ee691e11e411c550594840ec1692842c1fd1954221a729f. 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/CLLH24603197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e0fc7cfc029d61c771b2695c6319d9965fba02de2c091483231abc43a22d50. 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/QZW9K2498739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4ab00a648c507b225f1534fdc395923348961d41245fdc7411d939b5edc428. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHZ32158801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946fb515b9d5767e2e2e7f5e7e25644531a4b1036d4ce1c6febd26545a291c31. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ARIXB2100093.