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 0x165dcf8987232fb5dd8dbc01a815a7fe3c02aa321f317a3f42bc770e414b1123. 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/7c87a16b-3176-4e20-bcf7-869c7a8a948d.json and https://artists.proofprofile.net/proofs/artist/7c87a16b-3176-4e20-bcf7-869c7a8a948d.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 0x7bf36e8bdad837c7bb75f8b3938b8863190550bb7b9ac6b0d3c321fcb40e22b5. 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/QZNJV2119532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5361cd306f57974ac39edad0b49b4bbe33501d303344ef57cf07a9c94fa19c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZNJX2135158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0f0b99e55f44fc1e7b34a7390ac4e8ef48dc5b649be80994ed2e79b27fc29c. 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/QZNJX2135162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387b448ce17ede98bb5423881587a68d5aa25d2639f03162dee607e0e0193c7a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:01:28Z), 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/QZNJX2135164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8e199b060b8201e57f08edd4604da62164b76add98861c9df8482d27024f9e. 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/QZHZ32206987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05949a40f1499cb9329cbfd79e9b59adb13d95cc678168ae7cc30f90121c35c5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:39:13Z), 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/QZNJX2230369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a915d03ee0bb19961cc32bc3f8990174edbdbe8260756c56f577244930f6254. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNJX2230359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0985105a270b1d0e0f311a1e49046cc245c6a666286b856d72e0ddc54f47c40. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLM2395552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b9de309fbfa12b4bef5b47872f33a7d42c5846a326a727308417c14025092d. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZGLM2395554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950e4c2b985bf1ca46135768e1a5d93e956cf4e49d780a4df6771182d8a6670f. 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/TCAHJ2308290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165959322ee7cf8d7f1b877754437ddb9c6706da70a1aa35b288330cf672f59f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAHJ2308385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ac709583ac15b05d84d9f27ecbcf4f14844f917046adec6fc13e35bbca678a. 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/TCAHJ2308493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bae0fd64278ff218d4a2a0f60721cca737aea3d3d0b8c61d63c6c37d73b2be. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAHJ2308533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16556e1f4af5fc73aaf5be3992def70fa9684418f30cc4d7c70e42116de1446c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZW9K2344672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b6d860be357501c46db1f9535b7bf0bf6c5df766bd7040006d0964c43e2a21. 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/QZW9M2367142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd98fe55d1eb5a4289764c1099bed17c1ec63cc036cdec5025167c622eb14ce. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAHX2494449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e062ec87e90f3c59d434b41bbf5ed6e5aebdcbab300e93758b03bf62688d7f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:40:52Z), 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/ES71G2407954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f7d5590076399a2535d77abfeca4bf7a77988b2d290b1da3865bf0fea63836. 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/ES71G2504687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1cc4e7ea3af80868a729404b7fed31296e4c7c2044591d934817d81b27ef5b. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/ES71G2510675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2851b6fd4303008a50577df7b526682d4dc652e7db2808e485ed14977f024269. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ES71G2510677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69539d155c46335862d32eca13b236d522e530cff5a7df029cccf772a83ede2a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:55:11Z), 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/ES71G2510680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4663ac379e503e76abc834a69f0b90446f957adf208a85293d82283f62030735. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/KEA862500045.