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 0xdc38175cfe81c0572bdd89d23d7762eb83a44b3dca44d6e2ae216d75026d40f8. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0850567a-83e9-4baa-9c66-b2a81f619f96.json and https://artists.proofprofile.net/proofs/artist/0850567a-83e9-4baa-9c66-b2a81f619f96.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 0x63a518f627546164cd0f2bf48f4511b2276035c664aa7242b6bd6be5b9275dfa. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHNA2318387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d7ab79e6dacb70739929e14fec4dd92ab2770a78b70491662b65de9102dbb3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHNA2318390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81b65146fbffc20990e79aa99ddca596b24f48398fc07f60584681448c890d7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNA2318391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbdf1959362177a4f48c567d3bf8268ed17d7f4d16a719586242faa9e96b9cd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNA2364600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241f43ed9d8ade74340a9e7bf1a08634f6efb365507c2016177abef819f88849. 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/QZHNA2364601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167bcb7f5cfad8b6ddf3049ec28b54397deb4adc724be99b84e399213049c522. 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/QZHNA2364602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2873dbfed55e33384536e7cf24fd350efa7077bd0d7fb76138cf2ccb5bdf03a0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNA2364605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be742aed1636b06afa75e5f2eca5ef46f3179cd92098c1c9978417e2cb790c4. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZHNA2364607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45078500e486e6c52d0f93deb2df8b73dcf577c9751827447dcfc1d64b1f6cec. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHNA2364608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d405e3810b31d604522fc6cab546f4aa950274e3e5dabc0f9955a7c0a1426f. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZHNA2364611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd5605f6b3e6556524d28e8dfcb5b2e3a3b719f4903925c59840fd6658bbf65. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72307781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fd50a318cad018df477af3c31b185bc0cf59df8f46a39888642084520d8df0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZES72307782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecc5c8a6b3413617494f8a2e967ded90eb9cabc881901ad9dda8266c3c1bca5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZES72307783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf82f07dea518f082c960c02769b1c14dd275d2b869dcd19fb9077df1f1d5c0a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES72307784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa762a85bc814c787211838bb7d3adf04dc44cd5f8059a2c53b21829b4a57fe55. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZES72307785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7853b4a43dfad024ffe26e17453a582bdec31123cf26decad27de2d373c154. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZES72307786.
Shloshes Yemei Hagbalah - שלושת ימי הגבלה
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5a6293957ff809e0e769fe7ca6089bfb3762dd9a8d8a3bcb368669ae271954. 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/QZTAU2570305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58b5d58f2a886ce62ea19bd711ef940768b83a6044a169cbeff05488c2116e8. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZTAU2570306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc481f5c8f563fd4ef0bb9d36bbfc5d16edd87acd1246056b5f38a4db30ff7a. 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/QZTAU2570307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686b5d01e75ca9644bb37aa155170368554e9a02c53d1930ffab5d5e4971646c. 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/QZTAU2570308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037456f590e205c764ee319f4ae71c6fa4f8e2e4cdc4101814aea841b1927b11. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAU2570309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452b5297855940c1c1b2ff59acc574c99302532d9423b6105b77684bfcd5ad8c. 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/QZTAU2570310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cfd00f6bf2932bea7babd18ca3076a4d06c154ef2a9d08dfc88a1fd2161c86. 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/QZTB82310415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e620b187077b0cc10c585e776e3f2ffac662d62e5b856456613cf3c8acf9386. 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/QZK6J2420419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731217490bf93346d4cd4ee863a78f94249978030fcadda040fb7b42d31ae3a6. 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/QZTAZ2543958.