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 0x3ce927556e7c6e82d70dbbee9ca1ef57cb96303dd4765fdff834376a84b2913f. 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/fd451541-0f84-421a-8018-b913a0d5502c.json and https://artists.proofprofile.net/proofs/artist/fd451541-0f84-421a-8018-b913a0d5502c.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 0xa15a577394b2bcb6e5fc77ac7093596d4f0e10ee4582df54923aeab0ddf123bf. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:24:13Z), 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/QZPLR2001961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e4388b98d30f97e1fe936fd98e730b62025650f1451e0dad830ab31b33892c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMER2103517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7029c9897f2e5f128a7c190bc7ae41e5a280686d7bdd340ba9f5883be3010703. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:15Z), 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/QM4TX2219398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fcf17edf814b37d1d784775090bbde873db2331c77d5b1da7d2f0fb9486faf. 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/QZTAX2234240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2ec451e9d352ba69191f3b9bd409cac153bcd343e743a8e020a9834bdc5aa8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:39:47Z), 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/QZTAS2293282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca67a25c0bd56660336c02c8f3579630c38753a7ab913cfc1506a8cfcf7454d. 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/QZNWY2274822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240fb551d04d3e9d6ff24bea31bce6bdf41b9e043cac31497d29c788f7491c9e. 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/QM4TW2324121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8570c334040732d68ef6fd7deb76c16379480982e7849d287efed3a6a4e2c2b2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ72326002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00f9f07f20f01af0b6e56cecce7981854974c2b6b5d9fd3df4ac66ab6196cb9. 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/QZDA82368981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c62d349d2833210fffdce56f89ff9659a259285f38c9adf3fc0d73a98144ff8. 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/QM4TX2399539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae86d9c7dbb9fb86c08689c764a2f3542495b3f04addc025457f5ee227124293. 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/QZK6M2375324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392d95e43eb54ff040723388ad1f744018ed3f7c2350e81fbacdacc2ca85f966. 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/QZK6J2355025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b804360cdfe3ff68f96e6b616673a3420275de3b09fa21097270bbc0cc918a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:54:33Z), 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/QZK6F2345436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55bd582aabedef800008d9fad2cb5e034bbbed3e52a5f68362c1aa96cf088f9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAT2321047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b60f10c001d4286b4b42d4b4a7208dd2cf1b2de5b69ed2ce7dabf58d0140a4b. 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/QZTB32307423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb8219f7191135a540262ff822884f9a7723793608bbecfac999428466644b2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:23Z), 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/QZTBC2383041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9260d267b1e98b538a7ba22044e2445d7a536420a55627477d007f652236448a. 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/QZTBF2311476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516b7d84fd12f1c160646713c84f9f5f91e7d875a329f08413dac2080863c44e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6H2402703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3782d47de6e783aa7acb038b46a16203912566c671e112d06b0909a30b509ff7. 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/QZNWW2425287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa4e6d83fe6876a6c77da1f3d9a1dc3ef757f5609cd6c2bd7713fec3653e513. 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/QZTB82488545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cbaf106838b4706ceb1a76d9914c7b271e049359c7ca4ab525dbbdc090b2bd. 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/QZWFH2467174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2709e1788a2c6755602e2fe37a3d6a850c5396aee4e843eab1f476767d97d5c4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:17Z), 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/QZWFT2490554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dee11957dc14d7c157bfaf873acce01bfc98766211268b68ec47ac01c28522. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7M2402141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9318fb0807b0433ea6bbee3d6eb5cd1f2ca6ac1a46c9cb087f2f0bece56864. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:59:20Z), 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/QZNWR2552382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ae5fc9af8cff4f5390763e817581b084cd2f9e05e8a41a83ffc5ad3ba5e6e4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:56:10Z), 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/QZRP52559626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898e7959bcc182b68c92bcaf93e0209c50e9eab01e045617de13834b6b2e0291. 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/QZWFL2549805.