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 0xcb9e5e9c76f279a8c188eb9f3f99dd07e5be6b3b74d24dac5d852e00ecb7b15d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8522b75b-6a55-462e-bf06-cf8fdf051928.json and https://artists.proofprofile.net/proofs/artist/8522b75b-6a55-462e-bf06-cf8fdf051928.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 0x3ba0d1cf925f757ed03d617c5c3adb1b17ca3e23c354b79ca239217096b7fb35. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEM2529034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9fc73cbdd641540016c72ccaddb972d80e5b10328c28db3f3731e873e3b58f. 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/QZMEM2529036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176b43f1ed0cc36c7220175c828e0bbaead51d1554fa4ecb58253ddb6eec5b35. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMEM2529038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b06f62f7cf6c0079a46bea5388b25d98192f5b61bac7583e4e12276a9fbb59f. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZMEM2529040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239f18d6ffcefd39ebed626483680ab62c081720287ccd8dc73e4cacc872c69c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMEM2529042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bfd7954c1451fe32d3512379d5446fc62aef4f98c26cda3e0092abc8de4577. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:09:49Z), 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/QZMEM2529043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860b62da28d9b3550a64449a88ce7c7fd0694aaa524f22c52d7ca142f3022dce. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZMEM2529044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc4df8758a72f5e340a276b95b0a6358e633f707da8d25399e3819313ee1dfa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:47:48Z), 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/QZMEM2529045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ade77aeb6a0c4618fe64b92bcbdd1965852cadb83534a91a33ba5ed95de213. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZMEM2529046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349675c4ea4e924e80d79c9e896e5aa883a8d119074909efe9c0756b945021f5. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZMEM2529047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de7bce912455f9db1af9420912163435cada7f4dd630cd6b8b5feaa54b8a7e3. 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/QZMEM2529048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70d36f666f43d1b2afc863150b0f6c5d4ff2d8075d40ed732c4c58b453a20eb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZMEM2529049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8638d41e68ac1aca1a91ea87820b48575721c965cab7a60389568fec1d038421. 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/QZMEM2529050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c019e51950501f1bbdd8a126edd025adea6c30aaca2542c2a9e5c67f6ffd45. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:03Z), 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/QZMEM2529051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaa3a560629f105bca9700d80d3970266b6cf13ac059dc218d41c1c1dcaf894. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:09:29Z), 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/QZMEM2529052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44f045dd587d8e1270e633838ab5456d2a08a0673e46bb78648b3b6c9868252. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTAW2501108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e74933fc4798addbba2228421fda8fbcf91874cbf3b7cdf6b17938521692bc8. 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/QZTAW2501109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314afeb9ed2dbf26882410c7326b141fb4add385e087214e99315a601d930185. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTAW2501110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb784747f8bc6ee247e25f86deb6e6ee1a2f524b997709ca2b3b0dba697730725. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZTAW2501112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4b54a0f9b6874b5d3071b664ef7725da17ff6217378bf53d68392603568d16. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:52Z), 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/QZTAW2501116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e5ee5521aab6453a979c04170767e8e8ded0af17950a4012746fe2bfde3f85. 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/QZTAW2501119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2003c09d7878722eec8bf48c8c452a49228c8eebda69ab906f39f188f23469. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAW2501124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da8f35051781645f07196bfed4dca262c12916f748222e406b0bfbf269c5d6b. 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/QZTBF2597512.