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 0x392bc4de094fa43f3ac39c69abe9745f7d954bae4f9d44f335fb025b01c84c09. 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/00b72ad3-bd7d-4f47-971a-a501b7e164b0.json and https://artists.proofprofile.net/proofs/artist/00b72ad3-bd7d-4f47-971a-a501b7e164b0.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 0x3ba7568232d40f906af902791cd9ef7aa24c23e7d4ae67a6b3cab985c4e22465. 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/USDHM1827422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe237b53246c37fd23a72b4c5387464a572d2b64f65b6c566c444fab72208f304. 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/USDHM1827423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85ec1128c03a98f26495efcd0fff610053fc5b79185c67d3969437c7e0a7aa7. 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/USDHM1827424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b6d6ad4d1532c468b632b45ad998fd98cd89fec0914244f140eb3baa25945b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDHM1827425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4410949596b250fa3c5ca06381b7f5c147faf455c659b049155a45c3d4773a5. 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/USDHM1827426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040a612fd44380e08daea53d35f5e45ecb3d1fe2bdecb5666368219a9cc9bc3b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDHM1827427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70eae001a4ea398af2afced61a8687ca7e80fe57ac2e521f527a00d649d47ac1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDHM1827428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e2533151f437f36e1af0d517c60ab78b6360cc9f14ffd6c69c43d90226c92b. 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/USDHM1827429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f03af8d6eea0a27729127682b8a3cd816d0ebe143f66c0976a3a1f6e378774. 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/USDHM1827430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2d6815dfa89d2a2560e743c59dadee6f794b4716a6ec48cfe467100934f4e4. 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/USDHM1827431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f23cb8c22a57e316189096df1e9bf3713c6b40c02441985dbed4d0dc79f950f. 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/USDHM1827433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba00f1c1953e9131e04afd4d85b895bc4cbcac0ecae5d1cd303393c5df77e36. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDHM1827434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedff9939fac7f1fbf008d8d89c62cb2b03179b98b107b10740ad6697a39b4bc9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDHM1827435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660940fc7a214dfe334fd6a611dc951695712e6f3fb137f9869f9e30bb364a0b. 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/USDHM1827437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc47ba327ceb9c2e89658c5cef83c4b6bac3fc9f2a16d0b603d7b4e8dfe718b6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:37:38Z), 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/USDHM1827432.
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 0xace755d4998f876343ea0e91b37706b959deee198dbfe9160f53dbdcaf78c0d6. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USDHM1827436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69439fca9c743e7a34c8c80222d4556ff7bb02e1b3ff132d7f5824b683e05ad2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDHM1923006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9273c14daadb3499461a52755883faf73cb4b70187ea3fb4bf19049db512a214. 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/USDHM1923007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc92f4dd8f4621db4653094d17c30b86c1d52b9293c3fb4c2bd23f711d4ba279. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:41:42Z), 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/USDHM1923008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051adbc23ad52df01ce1fc82a75b1b7531a7295c31f37197fd78b1722d302804. 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/USDHM1923009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d83c02315373041a5df382b4ce1c2499a3efabb5d22adfd0b4c0dc2a6dbb592. 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/USCGH1756554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11af7c5e64a2478ac43a7484fc990a5f6333bdbf88ea3fe6ae17b16cc242622a. 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/USCGH1756555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf106cbd16b00080f38082861412deb55c01b62b9771ad9b561beafe2f3700f19. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH1756556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0811175c747149793e286dba04392c0c78d1812536557eb9e58fc8efe0d2c9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH1756558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b12c7e06f440f8c5c60c3f8769c61d3b2bad6e776029e65db17290ae559a24. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH1756559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e87c09d53554152c6cceb4052d25351ff5c27440a0bce6e4b1b3e4c3d4fac3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH1756560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa1cdf0183291acfbde476f3c16e52ac5e8cc6e7e40b5f1a88bbff028b6fe64. 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/USCGH1756561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5116073fd11b6da9b8b6a229067618c18dcb823be040d1f0987647ca790a98ee. 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/USCGH1756562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a84d0a041ef67911c7a87d50f15c5c4f3317da2fa4089444529d128971ef72a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH1756563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deb618dc6580c4a95f05e33f507cdc7379c7f117d2725ecbfa7ff410e1aec7e. 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/USCGH1756564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dd7d38e7964a8947430544f14184f8528503b325bfc616f6144f92d08ace35. 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/USCGH1756565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42afe683360c3712246fa9dad90a48e6c90387303cd1df65d1acf25d4b9acda2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH1756566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06258fb75f18277c0890a1bfa5e3600426a18a4d4afd64b8463a9fb0c5a4df24. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH1756567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae103f69349ad6ade2bcab776b07b3ad559832e5e5293eb6a2c7153b932368c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH1756568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e55dd30275a97ac5d2c50c45a71f550c5a69e1d22129bba78aef0c2acd311d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH1756570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d6c44f4b500e358e761dd4bee02bfd7aa57764a838b1b8fae6a814acc46f69. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1756571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1307303d28e4362407b51e234d298785e2668e30577749586d829a9abb464b8b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH1756572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedd6d7cf7fcf230bb0ba162133a44913ed8a1682cadaecc3a65d366eaa001ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH1756573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5415b65790be19395e789d84dabe2d1fe7d81e8e380c68f6622ddf7dbbe159. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USCGH1756557.