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 0xb463358cb6e0956dc189c592f3bef1e98b77b4a3ce09bbe13f8b610dd0d1fba0. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c6e9586-da79-445b-ba00-a91126c1d276.json and https://artists.proofprofile.net/proofs/artist/5c6e9586-da79-445b-ba00-a91126c1d276.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
July 11 '24 Rothchild Wedding (Kalmey Schwartz)
Sep. 22 '24 Wedding (Kalmey Schwartz & The Shira Choir)
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 0x18532c94bcddcdf7646c8fdb11a226e9cc986d436e8f07e2f6e1df8429e8c60f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZHNA2500573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65b3d236d2b7f5894b4d6682737f112c9dd036a4bb13a22594ba3eade1bf922. 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/QZNWX2508654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54ab6835f54aea2b76bbd67b3ae180802d0605afa39f33bd4cedac0fa6d4cf2. 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/QZNWX2508655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6a8231adb8902f40a6ca146b15277b694bce9cbfe2aab87dedd0b2591fa4de. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNWX2508656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb18592aeeed59f48417f1fa6cb79f5896775f2d4fdcac069a11b39583d932a4. 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/QZNWX2508657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126e07efedf0097ea6c993ee1dfc516e3c9bb4db05a249ac0972cfe1eaf0bb1d. 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/QZNWX2508658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd5a319fb377586063079e274a52633fb5c013826d332d7a72e2b3196da4319. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZNWX2508659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54682d491d38aa14af5602be94c1ad498ccc53cb246b14403b00cd47b0233537. 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/QZNWX2508661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eae96e11b03e58161b6cec0307c05787863f477ecae41cf6ca63834f35dc3d. 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/QZNWX2508663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5319c927f804f1de29d7e4d985bdbd886cdf312731c934d378717203d0687d2d. 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/QZNWX2508664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e656d69c72246dbc5f1eaa9801ba7b41008c8d257e490e19ac2d103736148ed. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZNWX2508665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e73c96709e8f4f0ab09050b155dc73d7a1952f65086ff8051479c95cf3dff2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNWX2508666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c61b350d4d6258a689bb9150c0e07481deb90a35eacf0e1b96824cc661a2f30. 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/QZNWX2508667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4851664a44516cae4a7c3aca502e03ff2fd6015b39f219b423d720d82ba05e1e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZNWX2508668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3961daae3f1e634d04dfc483e93f3c2c6ee793b6bab64a2aeee95a6dab04f3. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZNWX2508669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3e7891531a45651a2c9e55892f8f6b0df4194457e3b2f6de91845cb4d9ad8f. 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/QZNWX2508670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f547da84637611039855798267e5773ff162986540147e8e5a50d28d6c65e6. 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/QZNWX2508671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810137d902cdf74661363b1d008e1147352e2643518314080e529f778fc2c633. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWX2508672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec418caac4e072aaac7619d59cab851404de9391a51155be3f1d343e6964886. 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/QZNWX2508673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893a385b85a804d696388fd675d6c9ebf7c1f6c474c4118608193a42d51b3cd2. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZNWX2508674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b77801a651c374398404a5e0be11dae4efdc1c3d1d0c78bef46b6a69f87cbc. 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/QZNWX2508675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e16c095ed69a0d8942d3bbb8e091d20d0d1c0b730f792305ad019c9d4fd1945. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTAS2594179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41635eb8abd57d36af357d0417e6717191401a4521264fb0eda9d817fd8c0f51. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ7R2562183.