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 0x91e54937fe855b9d037aa862ec138c831fc182bc263448a48eddbf0a898a4d2d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16e3d66d-1a5c-44cc-a98a-7342acc9c83b.json and https://artists.proofprofile.net/proofs/artist/16e3d66d-1a5c-44cc-a98a-7342acc9c83b.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 0x1cf518a00d1ef7bf048a0b36e5066480b384c222e113927011b3fba7575f0327. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHNA1951312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892509a0becdf9dc4218eeef597e92dbf9884e690c5d6909725031a29beee084. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZHNB1995427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae141734c8decdb321c2a1001ab7de352cb21b6b0df9f154c8dc792723aa8b0e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHNB1995433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e80f211e73d3e3003a74833aaf017a4c2731cfc05a5ef77b2d5f654db0eb8e4. 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/QZHNB1995436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2014dd81c0968f41c81374b85585a766e8c73b879cc7e51707fe15ae0d466fa5. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFZ42069794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532686a0ba747a7ede34a734ceeeb41cce0c0b844c4e6202613f17ff1e649385. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZDA52012587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21df45c5a09a72a67dddf0ccb0e14e2ecfe1ad4faff0d62926420df66505216. 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/QZDA82050397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c660ef983f8bc8892bc4eb959941eb49592502c79cc7fcaeacc209fad33b58. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZK6M2074860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee725b19ceecd21b0b1509d0db8739614acea713898429aa9dd50c58158241e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:52Z), 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/QZK6M2074862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa4dc33eae6f480fb61cbcd7722cdd0fa8d9b286c38ab39e45a8b1dd3fdd5f4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEN2111807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab18a85f6aaa5980553809d628defe015606d9a81cce6a408c727db070b4319. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEN2111811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024b54dffe737cb44f186c6dbf9e7551066fd67ec865366f8d3df5661df63931. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZMEN2111812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069c0e9f7af780ea6ea0fbb06358513646f44cff5fd6f7865c6da4d8023cc6fe. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:26Z), 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/QZHN52376784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e88937eb5c84af79bc9a7bd55184fa05aca4a15ad922f42b9942d32b8dbddf8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDA72404876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b0dde6e30798a7cf194c06abfdf70b7f131ad816d0657fd555b1b52a3f9a08. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:25:34Z), 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/QZHN32462092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cf8c798dc73edf28cb683a7e5e4af67d253e2b648e512e87ad2646575fdeea. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFU2483333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9aab16003685803b96cd90f05828fe67274065042c33faafa6ed9e68a589b2. 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/QZWFU2483337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0f379e462cda70d8d1460b4ab3f8e7026f093c8061fe2ece0d45b5ac6d49b5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:25:38Z), 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/QZWFU2483338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3149b40dfdced3bc456a067e263006eae5a5dd9de85c275fb01dd52fde300c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFU2483341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd671a836fc37cbe98cd34b7270beb7fc21a6c9548a261023b0fd38e25d75f308. 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/QZWFU2483343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ca7453be1a1e46905584d754cdadd2b70708a33a4e8b94e5876a48202004fd. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWFU2483344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ca63f67456c7cc1fd0d6a14bdf4c2966c8b7341f8944a3ed5d026422515384. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFU2483345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f02b332ed3d87ae73c5aeaaa8bf61bc776d7f5498cd3464108a542c6332591e. 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/QZWFU2483346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550ba37250a61e5eb54c248d61dcb31b82af2dbc9470c303416cc3e042eb4e70. 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/QZWFU2483347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e1641e4581eaf790ab9472b3c9df39001c45eb308fd2d718ccac19cb4b8ad2. 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/QZWFU2483348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f37dcfc0c21ab064b7526a0836f94dfa1842b4cc1fa6455704b6a757e1b754. 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/QZWFU2483349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755af53cc019979aed0d22f9ee54561a896bf6e24c15c685860c1eeb0745dced. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFU2483350.