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 0xe8d4188ab4246cb1d6767eedde50b76da2294c7b3c7df92a883cf21f9677456a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca43e5ae-ad88-49ae-82a3-c4ac1e7ffe66.json and https://artists.proofprofile.net/proofs/artist/ca43e5ae-ad88-49ae-82a3-c4ac1e7ffe66.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 0x2e0850d9f5a6ad527b2758f85ff37f655a87a8354c0e228a74001df6f8e056b3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM80627711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3831775511603d4ad6f554924e6ab859dc3390c3daa58a117d325fea2c9630dc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM20741029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae65fb146a7f8882940033788b415a3c3ac42ecdaf1a5c097a20e69855431b3. 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/USCGH1053723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90c6c7c5d6b432c220da52e273e566cb1733e92ace0b5c98774bab15fe12f7c. 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/USCGH1053725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9876436fcd80477476336b93698b7508f13e9e806632aed0e5cbbb5d8cf154. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USCGH1053726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b47a38b25790297b0a7512369667dd98f7f37f6fbf924b56c4136052c4b687. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:38:21Z), 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/USCGH1053727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a026fccd2760399e633f8a3ff7492e57de90e49f945d021428be3ca989b96f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:02:03Z), 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/USCGH1053729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5100c9621fe4a2ffa748a5b3f2d1281fe876eeebd8dcb07a15ca777c63345d4. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:47:36Z), 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/USCGH1053731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac3a97dac8ce74441b1c8f0291a6f982c500b3aa211a5bfc23a052875e9e1ad. 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/USHM21228567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0df6ccd861b98e499c10af1393e129dea7d35ce01a9e2575cc01c04a1955f9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM21228569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e81e545de20c849a5a22171d375395d9ee3f528fefa4b0ded5fd43fc8699ff. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USHM21228570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7a47666c50b8b95b003a6b9bb99dcc96c2fb59f39529883b37a6068d95969e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:54:56Z), 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/USHM81423543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519e786b6a6970de5ffe8e6a4662a446bc4d3ee2fbfcdc44eb7375f6d1e99753. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USCGJ1805046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b606e5ea8e4186f50837126e1f37696b2d1bf12ce77dbe8559db8dcb524be9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USCGJ1805047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40622871be87e13238e537df725878d081b12ceccce4a421cfeae62cedb7c915. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:40Z), 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/USCGJ1805048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8932d172707c5c108d60421a8a457f562a2e4f6e2023c69adaf4a68d2d216cb4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:03:51Z), 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/USCGJ1805055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c36a80f6d41ae3578357f1c5e9fc951332e14760636c73b3c16881923c9e4c. 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/USHM81731049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af375bc4b8cc97df27f16faf4fbddb33722dee766b6cac2d1fe1453eb287fae. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USHM81731050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1592c73b54f09bf16a8f112e26e7f97218c2c32d85d422ef8e646bdf1d9ed07. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM81731051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f25e3e9ec4017bbab6eda56f00a13cb1e829e7774bfde6be1aecf0b8449c73. 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/USHM81731052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd430178930f9c1ac677083ca15596d04f1208b4195062346f5462833e77d2ecd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USHM81731053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fd12479032a752410d1f52524a127f82e8d3ebcaa6b79f25429cd8bb323bf8. 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/USHM81731054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f63b710f2ebc3e826cfe7395b87456f62f08777b7634a98bc9b70ee16c75ff3. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/USHM81731055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb42f2bc161e86b7c8eab6f5380784dbe38882ade83603dae0a51d602cc20025. 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/USHM81942168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed768d42d3006223284aa6ffcc696ab0f2a4ba305edc1019a9dbea797abcc30. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:19:54Z), 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/USHM81942173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71d0d45732dc6503a043fef1eae77a2f10e55c4582a87ab60d5c4da0be9aa35. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USX9P2060211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f3003b72e0a775e8e92334b6d3c65a32c30b3efe7fc09542c8f95616620041. 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/USX9P2060215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc888d91057559112584d469283f1b2ebc1aece99830edcfa5b0e7734005104. 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/USX9P2060220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a73ba14a8e9e8404a915c898e1025156e387a7e3b60ed711b488aa6e3a9229. 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/DE1AX2200248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1706881e04c5bfde188867c4f29039cdc71b5510d0d28771e35976f85b52b3f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DE1AX2200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6832332952d303f806edfd735b472066e558525285f0efc5abda327fcf81da5. 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/DE1AX2200251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bd6e3b4c0b13d61931b71916582336d022aff32cbb7372ce1ec06999aff36f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DE1AX2200252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1199fafe1a35de7e14487c5ddfea179cc1c482c526653210ff3369bfc012c1c4. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:57:40Z), 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/QZHNA2338516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b22793efe3bb0c47f566a306bf9a77b361732b3550bc2add7ea365a65b325b. 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/QZNWS2390180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b67119f616cb03b84d8ee5ae2877954704060d39c0b88594090586d77d85310. 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/QZNWS2390183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e49fbd7cce4a76e6a154415c97176d5b4d3d967c64d69391f3915b557660f3. 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/QZNWS2390185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda406a40d51db1ce582bf0742bf4e09c25b5037a90ee9b76f2c85605643e0f6c. 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/QZWFS2404334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a018b2096d5aa894fb4b04e8fe2eb8bf7cff0ec4bc3521bf388d973d8380f2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:36:36Z), 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/QZWFS2404335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bd345970d570780ee71e7ade6151165e3a68f0553350387bf7e231c5e8264c. 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/QZWFS2404336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa541bcf578313a09ae69785d4f70ef8a6b94ad61f378c618a1ba79eafc95851c. 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/QZWFS2404339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49dc55ad0fc68fcd07a156bd5afbc852d5d348f1ed7f4b0fe08c0a5bcdeb917. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJV2362872.