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 0x0fbb324d33895baf92ecdb4a0249096b00bc630543c73ad844c32bbb526d8d78. 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/d7f7619a-ca94-422e-8758-77d517baa2a1.json and https://artists.proofprofile.net/proofs/artist/d7f7619a-ca94-422e-8758-77d517baa2a1.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 0xca7f6cab3b3b12d63aea88c8bae784c1c61653d3c69f563723c4ac0b2f23fe23. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZFYX2443949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f5c24dbadb1f0a6fb5a67fbd24bffacb470a5cc03ef2e59fc9710a24c6aef. 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/QZHNC2468891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8706a5096f3d55af725c7f5050d0c0563277611f3c9a8cc59e7d7f22a0ddec21. 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/QZFZ22448666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3584f5f4d53387a470589d74832d9ca52646ccaa04ae2bb17d6fb144e3db3a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEP2372554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126b90e84c2d0b36c2c5fce0bad429092b20dee40987dcb078409838da3749ec. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHN72417903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72c6af642ef38e4e07b3593ca9d387bcd061b9ef066ec59a437f88ac1cb57d8. 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/QZMEP2336926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda228ee7729c775943398befc954cabdb152889fcbce85cc6a4960e89952a93e. 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/QZQAY2403832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e10d30f662cfd0077f0e18f1e6696f8f5f567bae94004a6e1a0cb896d0c45b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKW3Z2400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99329b0b8ba8383495f4757d848be5299e49c9065a0de6dbf4ca8c386fda9bac. 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/QZNWZ2331896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cb2a2e7ae98fb282485e330b769fe610b7d4124d54b80c3c17b68273911466. 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/QZTAW2495479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa771d381f5b1b50c6258079ac33c1fc3ff8278b9b36bd3b55fe644500b062920. 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/QZWFP2399854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b65337e1d112e37722dbe9b366f4da5392f34a737b61c114a70ec2fef00af49. 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/QZTBC2364702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf289b0f6c69fae684003b8073af4c09c88333853f680752d2727e5865c3450e. 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/QZWFP2399855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae900fe0a73785ff1748f6ba60ce6f1a6a2a64a0db0c5722c98784dfd3a3eaf4. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/AUMEV2541952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f56ca778136244cf2e3455ba75316fa64ea831282d60cb98fb822f6fa325103. 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/AUMEV2514708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4327ceae37e484e19858c8562a234f49f98c92a68cebf420ba70f12cbec6874. 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/AUMEV2518321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae900fe0a73785ff1748f6ba60ce6f1a6a2a64a0db0c5722c98784dfd3a3eaf4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUMEV2541952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b92e59b973f03573dd80b7e4396f1abde21cbd0cd470627f124072b5b360f5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/AUMEV2541857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5605d719eddefd9b93c114edb0513a44b18318c10842b259c80212d46e6e6b. 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/AUMEV2509150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4327ceae37e484e19858c8562a234f49f98c92a68cebf420ba70f12cbec6874. 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/AUMEV2518321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffa5cc916399491e7db232564567af70a77fe01f099303e71f86c1ad488b0f9. 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/AUMEV2508753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f56ca778136244cf2e3455ba75316fa64ea831282d60cb98fb822f6fa325103. 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/AUMEV2514708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac29849c46fe81a41617a77b307e92a08a1391e4e1f85a78d6e2265f576e237e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUMEV2505548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9b5a1b8600b7aa55bb42c2c58ee6717b77023e8ff32f1b24d924c85fa6e6e3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AUMEV2504770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90630d1ea8a98d68532164424c28c1f5b474d0d31fa31cd997fe76515ef8caf. 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/QT3F22467256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cbb1231c6e9d4dc90fffadac8fcb67c9ae1d9f94940bbd2d0f492540806c3f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFS2444187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b00d3d2b7409034105ce9fde69e885d2720964d7c04ac9c4ac08d73b76a267. 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/QZWV32489912.