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 0x53cd0e0584f8b204e8c86215b7221db3e30e75957b5b2ca005191d9fc513751d. 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/b44efb0a-72b6-4510-add2-f02cd63a4f28.json and https://artists.proofprofile.net/proofs/artist/b44efb0a-72b6-4510-add2-f02cd63a4f28.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 0xa6e4bf0371c74da7d53201162c428c80a68dfdab87b21b0ca44233201af7641e. 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/JPS801956073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6988285bf07fbf68754c8a9a6c49cf5bd0ac80d96864fb155bfb145a0b0bb2f. 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/JPS801955688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9eca37d57f97c380ad3bfcfbcf86a46bf962be4674867a512d9eb50f7d8acc. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/JPS802352843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f296c164240ce4d725d598687a7a6e1f6ab23ce2feb74877709e2a02dcef166. 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/JPS802352844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9a85a187349ade583fa0019255a6a717bf78f60e6a0a7aec62ad9c82b2f774. 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/JPS802352845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7d457b4308983aa322656c8ffd44800f793bbb9292ddbe74dbd03ad67197a. 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/JPS802352846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3bc2cb46311e275bb7970a542689564ee519a0627bb15273283cb76a96d196. 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/JPS802352847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a36e0edb6b32674f7d6d0d6f22864cf230296c26f12c5bcaea80d4e4479343. 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/JPS802352848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa52fe0b7dc42fb663154301d685a3e1993522bf84697afc12ff81d6b422e3b1. 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/JPS802352849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8899d25530d0eb05d9791dab3ef532522d00f51256f9fa61e6569a9a44cb772d. 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/JPS802352850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63239e961b828bdcbfc768c6131f2477bcf5e24025e68d895181f624e9295057. 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/JPS802352851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e29b68c2beef0218576feae44ae6118bb33df29ffe9506a3e533f70f3432e4. 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/JPS802353653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc149103b343059b8cab2ab6779f1d06d52781d9bc7994ae90e6d21de744495. 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/QZN882160472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d11ed51f1c392e066fccf554dfbb92e1cb806b7c657d6f0508d53dc0fb9090. 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/JPZ922307487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d11ed51f1c392e066fccf554dfbb92e1cb806b7c657d6f0508d53dc0fb9090. 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/JPZ922307487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfa2c8eebeb02478aa7b96378179ff80a635bbf228c0bf0895836e82d973a2e. 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/JPS801960649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8295edf58c4cabd436350e83026b868cec1cb72ba54b9b2e2faf8899cd0af1e4. 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/JPS801961972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e4bf0371c74da7d53201162c428c80a68dfdab87b21b0ca44233201af7641e. 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/JPS801956073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119d43580b85ba4fa487891a471023f4f71aa6ef2b9468be4b5d8a10c23f9dac. 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/JPS801957073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c82f746a1e89d29913e3e2e0ed7aa4cbccfe0f8713d7cdb66de15f96f230ca3. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/JPS801962173.