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 0xb0e0f3dd96dfdca33fd713b6f0d680f0ed4d16ba87e79bcf1b16dcded5c47de2. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a82abb47-1dfe-440d-827f-f3ea9f42b5e5.json and https://artists.proofprofile.net/proofs/artist/a82abb47-1dfe-440d-827f-f3ea9f42b5e5.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 0x4e8f27460f7160e5f879c12b590ae5c5f01f3c20720f20a80c1bdb0766e13204. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7W2529608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff7d636a5bbd3aa2f70425dcbe41df5d2c34e45399fa7bdf1e0ddc5f21f4061. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7W2529603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d550683fba95fee72b9f515fc3a6c51d5190839d1fa56712578e69805424134. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7W2562388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed87f79f97d4ad4fc8eaf4e3118b5f07f8c55f54a10882eed0500e8d5a2699f4. 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/QZZ7W2548113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0332e7fd6e19a452bb68497aea43196d8cf1d368873d84c6d392ff9386eac8a0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7W2562368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fde6b038581cddaba80f02f2874258cde85a1d99a497424cca9f1e141981130. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZZ7W2529598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c31e31a980883c7625f3ddfbea77fd3c55c8f1b3b144b959add57d751e87a56. 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/QZZ7W2529576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19af8c1e85dce3deb05e1c3408d4e4997066ac3b21a30b99cb5b2367821ab77. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7W2529761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d1facf34489af2426c1b11aa83e4ca8acb537c415b6b634a227c9750db0c57. 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/QZZ7W2529662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e736d0137510616b6e9ca60a5c0ce6ae21594688b7a5ab53a6512e84c11947. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7W2529721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde718174c03627bfadd06aa4113372b5ddab942bd4ad1bf406c8d3260b3b945e. 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/QZZ7W2573292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7406dd35e5576219974af3be6ad6954ceb071ba39da597d80d351aef396f7998. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7W2562412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13896769f9c08dca89e4058128aabb86e96bd21b9f9eaf3fe3f16d1d7c09a58f. 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/QZZ7W2570960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad7553bbedc97b442ec3c1592296333e47f6097f3997ea963c06a7dae39f2ba. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7W2562387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b0c3507e30ab643e775350a45dc634f6fdbe603b083c4cc0c692665e57ebb1. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZZ7W2562371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670a8d125d5db30b8ba5d6cdc2663b2cbc86c7c8d9dc11eec0c1b9040d2d216a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7W2573296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa405d1dfa94b8f803bcabb08a7044ae20ee540b93de6cde74ff2ebd10cb56643. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7X2525666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b7207cafe580c789e2f8103d51603eb8d25e6aa13efc810926a3a652f3a52d. 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/QZZ7W2562414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675265f55e3c2457376d781a057659c0833cc56a1dcf8ec158f87303de39136b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7W2573303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38148aaa4c4d3f7967e870a8e571b09f2fec69f0de66c37cbf2b2eeba9ba65b9. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZZ7W2573300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe579562083d93526552a9e0a6a86eaab4b0a82302b75ce86a1a8bf08f2ef8139. 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/QT3F52563051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb08c1d9bb27fc1ff8311ce38b4384ba56404f470da3a77da2a4e0b620bee77. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:11:21Z), 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/QT3F52565215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2fadd0c5b595fbbc4ea747b0b2f83beed9796d8614a4af1f427140b580f51e. 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/QT3F52567800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdf6344121bd62632765328f162769aa74044acc4e5a3f317bcf97e59d8e5e9. 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/QT3F52591424.