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 0x6619eec54024dbfb18a322aa533fd1c2ccfb2fd7f3454a5edea182e6174473fa. 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/bf69d32e-5772-488e-9aa0-5a6d2e2b3a3a.json and https://artists.proofprofile.net/proofs/artist/bf69d32e-5772-488e-9aa0-5a6d2e2b3a3a.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 0x77326d22b15eee9c2a51c0b404698eae313d62db7476775290ac30d00510f716. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USUYG1222323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d4f51962953ed623bdd939ccfecf072422dc3e18bd87b8332ab694057ff606. 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/USUYG1230227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e16caec4e2707eab19ca0b20cc6510d240d5c3f944bf79b5a55c4ba20425c73. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGH1969985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbe5ac50304fff1515f261ce57da75c86553f64aefca4a55c260ea3f04e8eee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFYY2019187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e9f028b997ca242d6bf5c6b149f771b87e2bf16e1d4c4af92027747c02378f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYY2019188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524e2659467bf7f5feab031526f8173ffe4d11fb8b1383d9679a95e47daafcf7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFYY2019191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0a1fb6b03fcad067ddca4aa77896de887edfec9aea12b75d3070a39c7c3248. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYY2019195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28825682640975db023c57c217e4fa1c692bd01317589faf0fb26bd5646befde. 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/QZFYY2019196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cd9e0e7ffd55d12165afcfea6043a0181b579fe74d22e530967cc1436b4f74. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:58Z), 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/QZFYY2019197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde2f718ecc4ae197401f2a1c68834634bcd06c8961bd4bebc30acd638643d36. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZFYY2019198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c40774b388a727198976a554bd171279d18341f6b8bbe899b0f999b26d18715. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:54Z), 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/QZFYY2019199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10da8278e0c18ca74a3dda632d5472a6c965f89db29082dcb10fa8bff66e877. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN52047141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4c7c030127cc70e2df6a5536fcc710ebdf6a52466f567595de500c8d78b4ef. 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/QZES72387574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce6cabb64e14faaa4db77656232257c0708d4380e313ef53881d0c80e744ed. 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/QZES72387576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbd52a1207e6855b7528b06cd0c9cc482b245324fd97aea0918ccdbf297993f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:28:00Z), 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/QZES72387577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c67939c304a6c952a9537619566b181dbd0f46baaebe7c17fdf5c86d2aff7a2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72387578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d8270b7ae73f1946333a5c680d28fcfccdbb0f084b3857c1b783c28d8f6dfb. 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/QZES72387579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d53e440af298ae4d7c07ff0d17786694e0aa5c51b4d2330964ce05cedc1ce92. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES72387580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211b6cbae3b1388c79b92f6699b29ef611babdcc828af8759946804ee16d863a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZTAS2443682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c662529658910170f381a9cc1ab3fafb53e185a7dbe107e551cc7f24204a5f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USQY51570879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73c07fc9cc90807a3be97fd60a5e0ffacc3860816e51c0ea832abefa45b7502. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USQY51570881.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db302dc7256041f846e4023a49ba98db00dd2dc9eb5c322109a12243c65044d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USQY51570888.