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 0x452458867c4f979c118b50a0392c14d63ddc059f985fc8011c0eb4d974cbf608. 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/1e90bd4d-de8d-41e4-8aa3-758c503e787b.json and https://artists.proofprofile.net/proofs/artist/1e90bd4d-de8d-41e4-8aa3-758c503e787b.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 0x2ac1e45ada98c9d6b9c5fbf2706f3c959142799d666acbd919e4d8fd0f7e7511. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPI82449230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec6e88a6c267a8806a4f49b42405f8bc835eaf6ec009bce8888d9dbb843fe4. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEPI82449232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e136b93bd19cf1639cb23098571a27f8b0a1b0fd5c8467070b80b92e2905e0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82449207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d709a440f05b411d8909b039b54a1cf3c80fd00977fb0943bfe751f39687a6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82449234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed7905aff613d909dbb9053601e1ac4823b98282af0ee2f91779a9ea97241ad. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEPI82449210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac1c20701ac34bb4b36b43608e1ee5e7fcf187272e01fd9c56b79877a8b269b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEPI82449213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595ad53cd73b2803b7c18b5b50b0e219f7a43e79de6e35dfdb17f40e9a8af839. 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/DEPI82448420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d9e30a488203f75e6ae833f018838e9069e8504961edb8cd71a9e9d38335af. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEPI82448426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b2e6660c2ba6d433fd0763bcc3f27303f4362fbf7dd8279db1d9b58e39e24a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPI82448424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a735cbef4d5dca801e3371e94f8a7c1a82f81467ee52243e438f2efb1e1497. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPI82449236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ac9eb8764d726aede7bf3a0735280552128605c13ed1c7516d04dd2afef644. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEPI82448428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633a11abb518d7f5fd22ac078826fb3e50f5a7e3e41c08212dd2b53f13f3578a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82449237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81866d13406980f3b4fe03212815f5b8889898b67afaa4141d39c1f7916ccb7. 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/DEPI82448441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b2dd1694a1e4ab3f356ad54902049943e9415ed466937bc3f3bad9748bb563. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEPI82448429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb174aba6a68d360e2ff9ffd023b49e6be2443f999dd117195476878d2ba95d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82449247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3c81f0bbb81d706e29375c7d7dbc02904254805d9adaecc4edf6fa26fb5369. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DEPI82449249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2170bf25297fc876e35fe1580c0970b42b8783f95f32f01c95c9dac448b8b50c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEPI82449253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d25c737d768c8a08212f057f3395fc909d6ca92c6d10b5bf2f61ec96b06788e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEPI82449254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d63292052ba6d9692ee4b49a0f71514e2dfb624f9925fa91cf8273ce577c186. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEPI82449259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6510a7cb8d9dd53634ee8ff016cfad0d55ae0c0c46f97fb191d122512e40f7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82449258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05bde990ca94b199ee66423deb1bfd11d07512636ed5e10728c57c78fee5c59. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82449256.