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 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 0x27dcbbc57a9ac61ae3d2a9855238f113ae9238bf33703595491384f5661490e7. 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/4185b151-1173-4bfe-bbf0-fb7c803b8f9a.json and https://artists.proofprofile.net/proofs/artist/4185b151-1173-4bfe-bbf0-fb7c803b8f9a.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 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 0x5229e8f12d6ed31a5ff8a1d4caf5e4c46384c810bb21bf3d90c83249275d2ebf. 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/ZAG300700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1f09a44a91354b938ba1ed7a768afafd7a1101cee5cf5136196f51ec511409. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/ZA61A1300514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488e23317458530868e2fc53b144753e3186cf1723c4f9e0646dfb29681031c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZA61A1300519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18694c48efd1bf937cba607c74885713d680235508fe23656e48b7483130d48. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/ZA61A1300520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386d1e700231a685a581174e63b596e9499d982900ddbb70db983d0d66a1bf85. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ZA61A1300531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465532cb436487f3d75f3d00eb915dddd8ff5525adcaa7aa275d24ccc9f785d1. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ZA61A1300532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c53aacd095eec660f3f45fdfd1b67872530470e5cb0574a6ef0c36d88badf3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ZA61A1300491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebedb35f16f1e16b0999f6af24e5991cae831e9ed7a6ff5cd9264eb4c302ae4c. 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/ZA61A1300487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59504ce99568216625593121d6ce055dcd0176fa38e3f80f0665ba55adde2c5e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USDY41571275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d814cc70769b19c4d1a16a13042486edf10b4f27f54bbd9e12191cddd6522a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USDY41571278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad0f55d46fc128394343477f86f845e0bf74b3e275d9e4af8df96602fb0e281. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USDY41675076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d320a1362daaa5d7f3a641adf46e832f47dc4b2ba4a995f046d52c99770f76. 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/USDY41675078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cf015f85361667f739b1227cce9cfde79f5e0b4d568cfc369dcf6f9f78cea2. 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/USDY41675079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afa40d6ab98c50b37e176572075423161b3f13bf4b3a187fe70f3706ef6093c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY41675091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef62a59d671acb6074a2157d4ecafb2f5322890f69cf13373b942a5aee99b48f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USDY41693544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cd29e0ddc85b667dae5458f91845fabfb920305aaf2b3ddae806f65466d256. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USDY41693551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1c7f069a36f637506da16e2d231409352c96e8a7634d7c634f6ed34cbf9c58. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USDY41693552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bb8d60673c163acb64f8a220c8d4015d8e1bc3c79e61a59576c1a9428e979a. 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/ZAQR41803234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15644a08baee78c8b559353551078c6216cca657583422fc48623ea724cced19. 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/ZAQR41803266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e23691ec9742a967c5e4a7192a9d8789ac1581521417cc9f097dbf2d6e5eb7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ZAQR41803269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665721d62e1711591ec7cec99ef114c4ddfefd32773352bbc78c67efb888d1bf. 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/ZAQR41803276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4f012cf046c9bc1b711c600c39d204e6dc9a6f581e2ca8ac4f07d61d18f017. 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/ZAQR42004127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a366b64c56ff5e829de9e0995e1c64502d30bd3be9a6a3e59057d643ab0e4d. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ZAQR42004200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f0039e05c3f56db8771af8d773dc8c6b2ea26026bcdf050b5f5c490145068d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ZAQR42004201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1172b9f71b36270c08e6da55e5f56eca6880ee0a3c2eb04762be178836034ddd. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/ZAQR42004202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94470797ec06e238725665821b680f4d9efa8188d2998faa59113174141ab00. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZAQR42004203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b22f4016162410eae4e062ce018768aa4d6a7f77b0b49c899760d87260f5e5. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ZAQR42004205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9808df065ed482a72c41cb037a172961443f7df19459cf125887d2c4f5b159. 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/ZAQR42004206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf998697551e2f1521e2c4a8dc320a375aaabf20145ae56271791407d82e505c0. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/ZAQR42004207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d397042f709b0ffd73fc8074a0a40472d5075dfa1d4e8313d0562ff0287007f. 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/ZAQR42204795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55bb329f87fb429ab7fc8d45ff812ec0eb362a0c31b21276eb9fd10a508946c. 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/ZAQR42204798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b090561d816bb0bb3d77b05eef8cb2505e4d178e243b1e9973c3787ce5b16ee. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ZAQR42204799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadb63dd9c356bf14d8b36881022d4234d4ecf7d7a3a1e9ea9bde155af000317. 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/ZAQR42204801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668148efc4cd243053decf33819b73711bef6cf9bf2845a697e001bb6334510f. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/ZAQR42204720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f40ac3d2ccba4d1cedfdd3f2d99212ac6c0dd9198513b7da64353e1784b833. 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/TCAEY2034283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b821dd1fac9e93efc4399cb79956caee52e7968cdac727f8647fb922bfc6ff. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ZAQR41803325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e6ea40ed91ce5602509f7f39f2b04e2c3baa5cb159c9ea883c51acf1622eba. 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/USHM91855811.