In Irish mythology, Tethra of the Fomorians ruled Mag Mell after dying in the Second Battle of Mag Tuiredh. After the battle, his sword, Orna, was taken by Ogma and it then recounted everything it had
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 0xbb01960dd86e682bdb99a9a94ada168b5d289b3ca32d282dbd210459878a4eb8. 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/cc128cc3-a195-42a7-b418-7ba8dba8db82.json and https://artists.proofprofile.net/proofs/artist/cc128cc3-a195-42a7-b418-7ba8dba8db82.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 0x5c036853889a6d385e23c71577784b8fbcc0f14fce66f7bfe34a0b23f14f3f82. 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/USL4Q2213543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ddb48e00e91bdd181f0d946307327e6720cc10617072408bdc0014267c874. 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/USHM92066179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f85f05d6d765debbdeaaca9ad1fbbc38c1427c54cb9757b961576a188d9f870. 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/USHM82338057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba99983f467917b2674c6436da23c7b54b5effe0bf14e72ae94f18e4b6ce9529. 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/USCGH2006912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aaa9958de6648dce0ffdb99f0a35baa0a981ea2bcc4602160893de83f0468c. 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/USHM82026678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec4efbb885d1962a910f773a718323d10573886f20bbefb2a81d2f5417eb487. 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/USCGJ2353943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359edc4f71f82e506495583b37f267916b5351e6caff4178b58e3cf55c64adeb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM21957649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9d612ec363e45327e5fc15db637b879dfa58e8793b0c6e3615ae3b00765e44. 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/USHM81986109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892fb102b2a7c86fa1a1f1a865bc8750a589fcffa730e28ce771e2fac2e5acd8. 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/USHM81986110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefa0738d4075e3b9aa6c4cc805ae4348bb2bbd8356fbdf47be53b67d71d1550. 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/USHM81972383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a35fb5ceef855191bc139d818fced23057fa1c776d148dcf23fd012f7f56030. 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/USHM81986111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7566ba27f93b666fd7575284140f707a3c175bb61ccb9e51ea9c79e2849e9215. 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/USHM81986112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22e46451ce54a7ce0813ba07fa78e318a29ada68754e4214c88e3cfc3791099. 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/USHM81986113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62ecd21f8ab2d9692fb388b8d2b9d28676afddf8ea3bb8316bb83eec615e087. 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/USHM81986114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c5f5fb3f701cda89172f7237ce6dae54519d4135c99f523e687aaec3ffea7d. 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/USHM81986115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10399a8e5da527c0ffc3253beaadacec04d64acec225fb9b85bae0eb7a3f787. 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/USHM81986116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898c442db9f14c1a219c6ba81fd7f43a5fcf44aacd4bc0523b7c8dc793d1216e. 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/USHM81986117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee80a76921fefb56c70910dda104528e693a272c7069c3b67e34428a3a70e76. 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/QZNWR2344211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec4efbb885d1962a910f773a718323d10573886f20bbefb2a81d2f5417eb487. 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/USCGJ2353943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c036853889a6d385e23c71577784b8fbcc0f14fce66f7bfe34a0b23f14f3f82. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4Q2213543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ddb48e00e91bdd181f0d946307327e6720cc10617072408bdc0014267c874. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USHM92066179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aaa9958de6648dce0ffdb99f0a35baa0a981ea2bcc4602160893de83f0468c. 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/USHM82026678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba99983f467917b2674c6436da23c7b54b5effe0bf14e72ae94f18e4b6ce9529. 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/USCGH2006912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefa0738d4075e3b9aa6c4cc805ae4348bb2bbd8356fbdf47be53b67d71d1550. 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/USHM81972383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359edc4f71f82e506495583b37f267916b5351e6caff4178b58e3cf55c64adeb. 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/USHM21957649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd2a4a0ee91f7468e52a534284324282d5616874dca1b8b80c52383477937e9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USDY41925129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6121cc06d2fae1a06bef2e09fb76631f256bb9cc8dd952fd261f4bc913b9ad. 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/USCGJ1976392.