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 0x9582e3817584302a902dcd06de9cbfe637a844b3775b0cd675c15d8b09857117. 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/3e7686ce-bd07-42e6-a0a6-65a823715aa8.json and https://artists.proofprofile.net/proofs/artist/3e7686ce-bd07-42e6-a0a6-65a823715aa8.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 0x9601ff90f6358cab2136870b9a28352597554c334b8966df492aaa690d5d402b. 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/QZNWX2164289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5c98035927cdd8620210c08ea629c148eaeebaadb2ce28c4b6308626c04388. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWX2164290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8229f12c2d190239191c775aa804604bc884856f524ee311323e0f499a7e1ae. 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/QZNWX2164293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6014f40792f1ff4673e11dbf75004c2c707ba9e01e55a9345ab63ef01e7823ed. 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/QZNWX2164294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1445540fe425363a9fd24b142b04f60e0429a7a8d451f888101cd9bf3fcbc0a. 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/QZNWX2164295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7a957bb7f0196ecbb714369520890b518fa998fffdd1eb58e5c3a8b3d04c8d. 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/QZNWX2164296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d9b8c098da47e58e154920862fd0b020c98c92a56010a4310b9d1d230ea32c. 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/QZNWX2164297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825a82481605d7c78b71e6d1f543ba3f7efc422c3deffaec41e9caa71d4f1190. 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/QZNWX2164303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4862ed1637202b38c64178020bbfa0c8931810902310296a84bdacdc33537d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:24:32Z), 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/QZNWX2164999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9ef80ac42d20a0f7855f6b624f06d4251bb0e46488d696a8e104043a8e4442. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWX2165004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f831e9f6039b2aaed21c53f2a5c18ed5c49dcc8cff93966dc6a3e3cf2ce02f. 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/QZNWW2144168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8669a84b9be6306d86d0958345f1173e14932f2c82975c49e9733ce605fcf563. 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/QZNWW2144163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f831e9f6039b2aaed21c53f2a5c18ed5c49dcc8cff93966dc6a3e3cf2ce02f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWW2144168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2598cbc61670e5fa69bca80bee7bd4ba4ba0e73051a862871e358d269dc2ae11. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:24:57Z), 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/QZNWX2166185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d5e7b5b466a50da7776b2ea7588cb765c5cbf1f7573507854367be436fbcd9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:07:36Z), 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/QZNWX2166187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137cc3c4936de296aba02338d6661f842f1d672495a22760b545b4049bbb0670. 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/QZNWW2183042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d355256f76862240ade62ada8f06cd8854469f9b353d360d6252e1743455d8. 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/QZNWW2183043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a61baa89f3d78e85c97494dda387faf33b867d36d9170ed218ea5e1a5ae660. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWW2183044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433bf0086efdfd8c255076adc1fa9dcc367eec997fd5a672e0c6b354084a3f2a. 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/QZNWW2183046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb318e7e94ff9cddacb119a15505882550243e9260da61b1327683e7c123e30d3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:49:07Z), 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/QZNWW2183047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b5ae26f2a5d1ebbf6936a4865688bde3c38ac46b288437f6875f321f9727cf. 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/QZNWW2183051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4511ae3ec421ac77fb4d468f5a29e4cf3b16579c6b710bc4e4a962d73d3c01a3. 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/UABM12500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78061e57e75ed3f83a2a4032a9795ee2e5563b0e1ea3190acc224f5e4901702. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/UABM12500291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e649e39733d1a1398e363088b26bdef671170260f2fcd8e2fc74f93055f996. 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/QZNWX2178279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ad1357675f81f72a8fe92503bf7646e328470100a7a697bd26d44b62b37426. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:51:18Z), 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/QZNWW2181077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c46a24061bc9e2442594c232c5d0fc3fdc3cd7284ac14a25a5f43c17dc69d3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWW2181079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b2d355890683684ca0c626dbcda1278948f2f7b1391fa4abe652cad85c5f1b. 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/QZNWW2181082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98635d68558ffb05a8e141d8fb63a5409188bdab33cd17fd0958c971894a8915. 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/UABM12500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1608075f238ef3b8c6386e2ba5cdc39957a3544d446c0302cad66ffeabf1ceaa. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWW2185279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb2033551ca10488905151784d244a609d6671ce6b983eb26203d0a38991b7e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:01:17Z), 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/FR6V80652611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e5d103cd24a1a3255c836d0a0e69136ea94ec736e6c947600ebc9ea3c270c5. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FR6V80652612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac0849bcf6dd8e30b2281c455187ed4795ef0df9ea0db6b74875a37dd36e5df. 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/FR6V80652616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031ac4a2989275fd98c7d795d08d882595a5b6da2af24f6f0b2ef745d1a8d659. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:59:11Z), 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/FR6V80652617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ef6da1fa0dbafd3f74f267a65eee72f2f828c67362b8119a843b061223486. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWV2376430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ef6da1fa0dbafd3f74f267a65eee72f2f828c67362b8119a843b061223486. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNWV2376430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33db3b6ad1bacde4bb4472f37718b72a99602331efdcc3edb05dd86e6a78f71d. 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/FR96X2472317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1578be78f63511adc7eb4393d64383fe8c6790c0ba6bacefd8351eacfdb9057d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FRX872450741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e4e8cf363522116a752cc6296197dc21f93c75d628e44c6367132ccdfa2dc3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:40:28Z), 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/UABM12400556.