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 0xcb737de50a6c5d433564eade77cd9515694d91877b58dfd07fa1892132334cc6. 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/9f23888e-b67b-40e0-bc31-9bbc83f30050.json and https://artists.proofprofile.net/proofs/artist/9f23888e-b67b-40e0-bc31-9bbc83f30050.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 0xca2de8b20900dc22fc8f56b66aef078cbed71ade6cefc0c5f1f9d957581fe025. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:11:27Z), 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/QZNWY2068554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82c5a6efadfe1cf6bf2ac4092cb552d57f3ffc8d7ea9cca88e4233c1997456e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UKR6V2112555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4538cc0ec98493aa2be3b96f51360fa059d00bbcafe06738525d324d39a318. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:34:17Z), 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/AUMEV2141885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef2735c6094fe2fba76a925a9043dc8affcb705e61d46d3cc871a776f136f03. 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/QZNE72100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae136b4aa71df29cf2d157d3b3950324a08683ea499af0205cf1f062357ec90c. 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/AUMEV2250188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb7dd3c4c6e6e3d236fe8fb1ed018fe524156c5c51a8ba8d8f95437d860d797. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/AUMEV2353428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4f315a78dd25c4c698a2aaf22b0f2b4e1d2d6b50acc67142cb9e846235320f. 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/AUGBT2329200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38905d37476d586e2e607d761ae0074c4cb12f4f4c2157e751fac6f37995736f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/AUMEV2467749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73ad389ab526ca5802792a075189aaaa7593e29f97be616b6ae3b56b574a041. 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/AUMEV2470456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2798136beec5bcfb40a3f0dbfa0545c919b241010b190fd7b544469e704338ff. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/AUMEV2488797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc799ef7155a07315404732a5f771776d3c2f7bdab541c5f48a6c17b5b9e7acdc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/AUGBT2407172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361167732ec1f00f3bf20fcea25cd3da65776162dcf10c9b6d62a5fb3266b25c. 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/AUGBT2427212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ec191d866fadeb290016318221a81bef0976ee135c6897e047e1d2e611f3b1. 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/AUGBT2436474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1584af4bba500e46e7bdb1aea9f152d105ccd36001136d7d8d57de85228a24b0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:36Z), 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/AUGBT2461400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd689aaf52b0965ca5782876cb911cd69b99e5d9b3ee144505bcfae1590ef0cea. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/AUMEV2522408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a0a3d2bce5073963853dd86a240093d824da689f129da77c7f3af782e44241. 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/AUMEV2211235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa104785e1693c02d6bb28a08499825f01a68a7cc7dfc62ffe986db30db499707. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/UKR6V2310788.
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 0xb8c2648d509bbb702ced4a6f370c940d52f99a7d269148517f12eecc1dcb7e17. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/AUMEV2326830.