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 0xa20c07a8bd018f450d34347dc6a063ef52c9ff153731734da7b0d0f056a5239b. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fc99c48-6698-4fd5-983e-a899d8a39866.json and https://artists.proofprofile.net/proofs/artist/3fc99c48-6698-4fd5-983e-a899d8a39866.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 0x4e56588965e99bfb86a44e5d4a6e806c107155b3aeeef910dfa5c0bad7b23570. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZK6M2284665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f08838ae53070c56670fd0bed8f164c47e9e21c47f7f77b5848730c6238e31. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZK6M2284667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28df7d42e0d49894e1cc00ea4e8ddcbd7a5bfb2e4f63459575075fc0b3f3532. 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/QZK6M2284668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ca4e9db314d56db1b1ec560bd8515c1986de2d2e9833a7bd7ad565a18b2486. 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/QZK6M2284670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424d319a9dcada52a567fee41d52630b38f8be84ec7196bdc9badb4654d33976. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6M2284672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10eea0c638fe3081824079748ceadf0576a0f8f2009b18b27e877fcfa597d52. 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/QZFZ22251965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789c9846fdab9d71d014120ab968164ecaaf48c6137710ef22147a9c2455c220. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ72230526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a80fd82a5efc33bdeb212aea9a6f0fe314046427177dd80ebb62ef27f7a257. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ72230527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c81a5c60c3db202508438402c9a277c3a3e5288da7c2fbf722d81d0f6661de. 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/QZFZ72230528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf993bd4aae5524169a2a2407374f42a7e98f83e8580ed09437831b6bdd13e65f. 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/QZFZ72230529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239716c729b103c00405a528a4f86303a44b9cb4af5b4b75587df8aebe890789. 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/QZFZ72230531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0051efc3df7bdac4b6c2614363f090011c7be174004abdb837458b1223918da. 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/QZFZ72230533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd243022eabecdfb748949d7e32f87ffe5f2978f2b437f0559e51e663d52f970. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZFZ72230535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150f3778463bf2ccc34ef1324def8c5d0a1def0a3af2fec72fff01c09c63a7b8. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZFZ72230536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bd7bef9d275521f5900179cf53d4466a734014ad1f82aec44377d1cc77f458. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ72230537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7db4aa902b28371e93bc34ad8636038485c8c50c0d2f1d45cb0f98e2660f299. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ72230538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51da8b9c39bab8d005412dc48a6a980e3ad1eb7f92922f6b8f81dc39e4c52ae1. 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/TCAGS2358979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67838d9e1e81761067986b49b0bbe0bb3afbf03f3cb75ea5a52641dfd5a79a9e. 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/TCAFZ2299034.