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 0xe9698b5eb9fc342de4c8edfdc3245669732a619f228b9fff3231bdee5d0bf75e. 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/02b94f65-b9f0-42a0-9ee1-667bad89d65f.json and https://artists.proofprofile.net/proofs/artist/02b94f65-b9f0-42a0-9ee1-667bad89d65f.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 0x60bc6af4ae53700f63e65ca6e1cd1b6c088a2dfccfdf0972ae0f79e11f291a7c. 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/QZDA72476242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2957b002242c538f2622f23fd32fa1609b867decde224a22367ec450927044. 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/QZDA72476244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8623baf3896e2d5a47f9934a6f62444b0293acb74e425d40638cf2cdfb7d35. 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/QZHN92421400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011270e5b2e0d53450fbfff1b870289c5a76ac7576f97a30c243124039b94139. 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/QZK6G2402664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4123bb48936f1df812d4b3ec57d247b5124ea3fb65f0b27292ea46a34a91d8a7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZWFV2434165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3b4774024bf76400ab38a191f4fbf663bb50864bdf8f370e09c98d607a1536. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:30Z), 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/QT3F22457127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145b77bf95be627a42b745c185f4291655448b44c5c54be1e2305c88843dfabc. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZWFN2456569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3c1fdd76acc255d1bb0238f80d513d408c4d683f41972279fed7ea44d604a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:34Z), 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/QZFZ62553377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85a5142288c74e88857c27a3e281616ce1b2f1c77ebc77f45432f60a975a9a5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA72578039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8702346031c50602334c52434af490f237538926e6135117dfd03b8073180ac7. 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/QZES62543353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5e8188b2105a3b57da50a7cd597c8699a25210aed7c550a67b658c19f5d36c. 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/QZHN52521856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cb5634f29f96dab15b2761b93c6429da10ec9bab456e46f8552c548c57930f. 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/QZK6L2581540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2106be05fe3de241c31e91017f041b1cc0148f07571e6736a989c51861f3307. 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/QZK6L2581541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8643e419a512f91d028471edc0b06af3c301fd8bd065400451c62d830776e459. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6L2581543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f66790611dd4d44bcbd0bbe7ce31c572da147cdc91e9d6dfe4da3cdb4946b13. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6L2581544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8863c9676561340294a36debdc37581b123c3af1720d11e263eae604ef269027. 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/QZK6L2581545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1ad65af77e9de01d9118709ce916e53c21e08dea2badbd740b5f6a1ac5bbf6. 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/QZK6L2581548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e55e61da47662a8fc0c4a76f3dbee92ac2452a07378f9112666403fb33ef63. 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/QZK6L2581550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7cbb0ac6dd05abf062296d74a81b0d0b08d14b480c4263b72aa88059b3ad40. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:52:35Z), 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/QZMEQ2592097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb33956c78c771c03e155f888518a6a4fd4868ffa43936199d56feae5eea919. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:34Z), 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/QZMER2524753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae3ae967d5b2736cb896bc872aaeaf980b74697a59126b17626b932595e2f5d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWU2513148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392e3c2d8c312f972394fefd8b80fe300d3d21b0130cf2e01d7eed78b5c1bad9. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZTAU2581311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf178d8496482f621cb5d96f72d49fdd348bd3be2bf183c940897bef3ca5428ae. 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/QZTAW2568905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26271b4c473d851b8dcba7085f32ee3e0df7cfa124260261289308311fed98cc. 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/QZTBA2565857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d2eb79e5aa4d176e72f088e41200f5475152d44ea007458e435a81cf6ac2d4. 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/QZWFP2596358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d2eb79e5aa4d176e72f088e41200f5475152d44ea007458e435a81cf6ac2d4. 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/QZWFP2596358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1fe93f27044ac3ddfab30e17d88dd65f07467c0679b30b66fd10286e981911. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:31:23Z), 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/QZWFR2554861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee91790f5856ccebbcd60608d25b5aefa0355432d829d6357e1644a80acb702. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZZ7K2565151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3338087f3e7cd9d470dd920d94f6993d6753739fc279347a562b6bbb9369e4. 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/QZZ7K2565155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2759827e884bb3b0979c45319373e42d077a8c0019501dfa062ea9449028eaa2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZZ7K2565156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029c19706a4b116c5e410be8be6e41deebf80dbb07a36903c6e17b08d88e88cd. 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/QZZ7K2565157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eea25c8ab2d6b03a684250024e0163a3e4ddd41f9400b2f9707494f71d6f57. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:43:31Z), 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/QZZ7K2565158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d26b23fb6bd25260ff9833bd046a654a599710325ece2ae36ed61c2b6600af. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:00:13Z), 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/QZZ7K2565159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913748debf8591ffdd4c6b1931b76281452bdf087fd7aa92b04a6aaab97210e3. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZZ7K2565160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14486f24ebefbe27a985444e618d58b11197976c2e16476dc432698577f65b7c. 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/QZZ7K2509257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea31d973e3a74a8cfe3e23b16d98ce41bee969e21a95bf3d1045b167c652138. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7S2541166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3e7e893569b071f3d457605b06746d6beeb92844719d5bbf34a8a0f5a2d05d. 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/QZZ7V2590315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f380db05df65554f3df0ff9351800a5cf201a18583b80504e303a75361cde64. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3EY2507852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76cda12b648cf15dbfa209234096a16f53fb55bb0df97684289ea2c772db9de. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EX2597912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a8f36652970c1234fd1d90d3cb07215bc56de72764b81f2f039c0accf0e65c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3EY2552436.