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 0x8042e03a55a92f9729bb85184f5942c632111c061ae4a012e67425f50fb6a158. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5dee91f-35fa-42ab-8856-cbfc3b8780f4.json and https://artists.proofprofile.net/proofs/artist/d5dee91f-35fa-42ab-8856-cbfc3b8780f4.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 0xdaad62d70cb571a40140735d5dc8760e5465ab53f4a823fa410f3488991f1a2e. 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/QZANL1780511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b5c838922a01ddb61b097aa24694bb6f0c54b920059326460f2fcc71fbfdc9. 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/FR59R2442148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8942ba06539492c05e6387b4d5ba3b9272b32b94694774e3096687449a9efcf. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR59R2442146.
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 0xcc6adda24c888ce8ba60b73c1d6df2092d0435741b4dd8f35f9e4cd9cbc9d0b4. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR59R2442147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad57d0a5cf99542cff7cbf330f2349244b940cb1c4d1cfb83197e149724bcdf. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR59R2442149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d796aa8a2efd83820bcc16ef271083c0b83bc85a5d6529914802994b4533b3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR59R2442151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789cfd43becf0d64d83180c5c77d65726c078877d050ed032d19a66dc9c878b2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR59R2442153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd712d4f91511c41089de387873928ef20997d6fb4b07134d7088d00c3b593149. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FR59R2442157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a107ec3f031d661897de057c2446f12527932e039df73afb99113f41a4089da. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:51Z), 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/QZES51840261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2f86bbd0d7c1aeedb6a667240ae416778ee62c422d4dd8214b0e0a6c86c859. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:20:15Z), 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/QZES51840262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8069c21eb8a82dcb2c038111b9cc023cd92053d6e91b2802e496ef267dd19ff. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:39:51Z), 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/QZES51840264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa096f8bfcfd5e55db7dd3e993fc10a0a8903210a8a90d6a4f7505d5f2b05975. 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/QZES51840266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73298b2c8ee9dee2098adacb2dbfbcec8e7049b0f9d6485cef635bfa62d737f8. 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/QZES51840268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca921f6ce49c03e19c9538230d464f3346f17fe68f84ad615cdaaba8c326296. 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/QZES51840269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ef5d318684f5c9620b82a692b7b7b5b8d0cc41b3e572c9fb45e21a31dd6287. 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/QZES51840270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d5c876e11f12944e9e75c9e9195f70ed8de945b410c4a19c7b29de95358233. 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/QZES51840271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9990672b149051177eba4a379bd3c474a1829589abe70698f7ccb511ba157ba4. 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/QZTBA2486580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dad4359d5fd74dce64fd00d8ce776bdbc1a022d686d947d76876156ce5f71cb. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTBA2486584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dbe9b8eb216b1b956d548341de9b49f84f2918cece646117615576b3bd10b6. 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/QZNWU2095267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a135192b0953e53108a7d05504d31a8eb41814fffced74baca5b6075e60f29. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZMEN2037551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0a13eb6bfb44bab6d1aa652902db61094c58934676eafabcfafd03d995afe5. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/DGA072131370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0f152e624a8a74553fe09274d312d525cd71464609e908cc2cb094a2a17dfe. 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/DGA072131371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c37ac59611a542504b1e4fe3c05e586d80a7657ffb413618ec1c30ae3f78e5. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/FRX452226513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3271d408be083966acc91335df7da424636044f329c4d11c2527f0013d1c155f. 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/DGA092376457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f13e8a5f95a3d27f77c0b4ef6bb92b59100ece0c319ce7fc15eeef772676dbf. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DGA092376458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc18d4a7cd37c42dbb1073f30cca907261ab327da52033c712f32260c028d79a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:36:01Z), 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/FR96X2470708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b92eb92dff15bacb9b3bf972ce997e32d6748e871d6128003705f9cac5a16c. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/DGA0H2418230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8181091f32690681773614fdbfa9d4f11676e65b2218e4816148d0f2c3a21f09. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA0P2423415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529a4118ef162714d3b18428747a1e27601e4af27e562cb9177e602ff7dde1cf. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DGA0S2438979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877412013f7521cd3676f23dd5e4828eafc549f0db686ac646b2df3317a87e18. 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/QZ9Y21727686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f487d7dea694aeaed9bc509bc5da919870be31fab5c240813739f4e8720748. 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/TCABN1383363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caa4a129314f4013b84f9979ea32b62b2936d1be921ee9d216115a143cfc6c9. 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/TCABN1383375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c779dc4e502fc849c33dd27aefcecdd00ccbfb8f590d81c5a219a74d57603a. 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/TCABN1383387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0a749530f5d5975aa72d3a699b4a92a5f6638e676ffeb4a24baac64c092ae3. 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/TCADP1855800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4259aaec35f2044e6c551fc6873ab93f606ab846c03e60a6b775b4854ae3d543. 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/TCADJ1755567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2065eb8d23ac52ce68acfbfa5fb7a7f044253291472c66bb48030098c4c454a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SKP592400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caa41f0d8893df86603863746c16c12c0909f9e4eef9624b581d104e229d349. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMPKX1891078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181b6c035ae39edc030d037765fe17bb43466ff8dd13211f2f70a3aa198b02a6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ9Y21727688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cfb676b23747c19175b106f70241ead15d729744c7ef3120b11b38510951ba. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZES72258350.