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 0x8c9c088d089ad9383cd0ed3ad217a7ed877317980d6d5f588e8608cc1e0a957e. 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/31caeca0-0365-4e05-b066-349078ff4eac.json and https://artists.proofprofile.net/proofs/artist/31caeca0-0365-4e05-b066-349078ff4eac.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 0xed09a39026a30ad0b1ecb12b62da240a20e1533b3e079c6e110a0232b1726618. 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/QZK6Q2111357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7f5e8a8a2d62482dfed1cfaa83433aa4a848bbfd3e86a3ed0cb7355b2faa20. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:05Z), 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/QZMER2224346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e135745d9c29cd11dd00b6eb6c229c66efb1366cf36e8a74bc636a3d90c0365. 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/QZMER2224352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e42b60c3503d171bdd33db95ccbc0f3bb109a12f966597f7736846f6b3ebb8. 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/QZK6L2357883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27df71b5094626af0da5d804ab6fc90f389c38415215e7fe6b50993f593f7396. 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/QZK6L2357884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6de409caca7a5689b73312c974fb109c93073e06ced4f32882f0f8d018526c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6L2357885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049cccc5fd8847461e71fdbdecf887bb5d5c2cc695390c3d73010dc48dc46bf5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:09:26Z), 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/QZTB82308974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7d1629cdc84bd4e6a443aa9c67980583dc8c8f0a4ed5041022bcbae381ab9. 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/QZTBD2391994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355742c6d2df6341a917077de441f2de638d26f0213ebf5afd39b19a5adc0323. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:24:00Z), 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/QZWFN2398128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c51d11f3c70537ea9ce32156de210c89d7ba1d4b221c6c0529fbc348bfb8b5. 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/QZK6N2482399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c51d11f3c70537ea9ce32156de210c89d7ba1d4b221c6c0529fbc348bfb8b5. 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/QZK6N2482399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673891356e00bb26d612d4223653655145dd2b9e6e148afa3da0e3ae331ad551. 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/QZMEM2480602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6aba4f6ba336d1794ae77b7147364197940c6ed99f3f376dd058f7cca8b1f1. 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/QZNWW2441927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6aba4f6ba336d1794ae77b7147364197940c6ed99f3f376dd058f7cca8b1f1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWW2441927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10936193079e146ff76c910236c6364b07974244eaa018c6ec7a0d6839a60242. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:17Z), 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/QZTB52413499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107e9180d7c46b27f2904672a99c05a1243df0308887e7cd9594c3f20f30d738. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZNWQ2512533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82059e47b4c1a1cc45d56af79a26fda429b99110981066b184e5053bd8a8542e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWQ2512534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdc1b2fffaee6deb61f617099508f485ad8cb90dafad9b00394d41c9d50b795. 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/QZNWQ2512535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4276ba4103784a131b65157823c82a7c938c19293b349375edd10b36073249e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWQ2512536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6e1752f3cc48e84290b3eb3ed2603630a7302cc98476940f80af51bf5dded1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:20Z), 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/QZNWQ2512538.