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 0x907d9481bd47b329d27aac585262f7fad223e276f8ef17fbb792e6c27b4a4ee4. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3417b1d-8dd2-4736-9cb8-cf323fec4d98.json and https://artists.proofprofile.net/proofs/artist/c3417b1d-8dd2-4736-9cb8-cf323fec4d98.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 0xaa7b35c096ffbccaaeac3d9b1935eb98894fecff12243172a9918bb7f2efb441. 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/IEAOR2300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa086924b9f6984fa364cfd6c1d7f843b7f0a6775a2ab063871255bd98456155c. 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/IEAOR2300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f7fdbf3faa7feecd993412a72c779c2057f2cea304823e58926a8d73580985. 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/IEAOR2300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c24b7bc3ee358269c5ac8be6884e859951f6adb35da76eae0db7d881df6702. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/IEAOR2300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cba4402c3b77e685f778b1844b9fac243aa44ab8a93d92ed89ef6d5373ddd99. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/IEAOR2300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc974b32afc246a65107c3a8f17a2a2b00e0757e997cb841e9210b252c2a33bc4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/IEAOR2300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f57850d94c73847d9409a7f55b2a10971cb55b4107521eaf63d6a388a6ceb92. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/IEAOR2300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d417b8b837af41857f7dd7bea17e7b61f98b56a8df14214cee013954f5b3fd3. 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/IEAOR2300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6ca83544ce2de14bb9137896ccfc560d7cda544fb0f235533f3a392fb1ff75. 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/IEAOR2300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf5b369d9921b96c71b5b0f35c4587304ea9ecfc6cccfba620de6f635ada7c7. 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/IEAOR2300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b3ae8a815465fbed0221d8ac2911a21c2b73a89c28d8a4be8f61806d4dfa3b. 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/IEAOR2300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9ba4b93ee0feeb0d872261019009a1eca2ceb7cbae36c7417212238c84bca3. 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/IEAOR2300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe263494556725e6a6df2b012554ac4dbf4a6a9cea5bd9bb1a5646eb4483150f1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBBDZ2131931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea56f5d7f83ce3f398bc0c7b242ff39998663c7f1bef7e53cf194284892840e4. 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/IEWIV2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad1ea9a701a1d46e2ab499afbfbfd6d6944e14daec07cc974144d9e1af91feb. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/IEWIV2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6214275566656b07117ddfc7a31a2418b7e2905ab13b389d72cd437b3216d7b3. 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/IEWIV2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29afe0d9526c6e2bb6e95217712f61e44346f872ba2bc5fa392a592e5267fcd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/IEWIV2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97197cd5a68e1db633c0095217dc383c267fa5894c6dd42d661a94556cc76f1d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IEWIV2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d5be9fd93f13e5965196095594b50387a65a4283c0fbef556b0d8d1717d8e9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/IEWIV2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2da7b9e64f53d4c9aabec4982c29a69592abc8323243eadf301f5fd97a08bd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/IEWIV2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4fa5e7356918df7b53f54acecbadd7f036cb63e206ce1ec155e34ced257f24. 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/IEWIV2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee234889f91006288e8561d9a259745540ceeea8c8f813e08822cbee5069097. 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/IEWIV2300009.
Caithréim: Ceol Agus Amhráin Ó Dhrámaí An Phiarsaigh
An Chaithréim / The Wearing of the Green
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4bbb9898fbc099087e54206463387e75fc671d179b5bc5a2fdebb15d54edfc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/IEAUV1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58de6c15ccbe062613b69a9ccc9de43dfdca92afb36e6e84491c8bc4616330b. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/IEAUV1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e854da7881cb4e74d3ac85d430e8a70cf9fa9a4bf46381da5af507ff14894d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IEAUV1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd716fb6807bd2e0f8aec524af030d846a0f931cd417f2f9e33da612469fa6f45. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/IEAUV1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe834a1d05cbc893ddd3cbc25793d441e72c31806a1fd5b3b7c3ee0ce4577a252. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IEAUV1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703aeaf3b6308f6dd103a3e7841d8335c7d0a817dea88ca0a7cbaebb7c46dbb6. 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/IEWIV2200001.