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 0x405352ccc3c2dea306e555520320feae88c479cd7e3b5891b1d68c4cee263e0a. 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/6aafa546-a77a-49e5-826d-cbeb884d9bd5.json and https://artists.proofprofile.net/proofs/artist/6aafa546-a77a-49e5-826d-cbeb884d9bd5.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 0x70d9d1765acca5f4cdfbd2c460b3e040c7935825bb4a6202dcd7b19b5da980dc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/USHM21816925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fde3d3d13a69865cc79ec9e231f75e5f478db0a5dcf57a068a55768c20de159. 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/USHM21816926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a213443755dfb427ff6da30ba76ddbb57c5b6b2738dea8e997180e69564f541. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:02Z), 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/USDY41962214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4764005f7437df4b9c50883c89556b2ca95d53d895ff961ba0f4fa45e99b1b8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USDY41962215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678532ed73cec2923bcb2716e46c136a6047ac1603b17dec821f94553259b8f8. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USHM92080266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b9061944f02d44dd8cc8d6e3b593d91df94b2f63e927bd60cc1d4289249529. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM92080268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309229bec9568c90338819009958084a5caa2992daee1c20dbe71ff951debf98. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/USHM92080269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00d47e19e3ce1c55a9e558f390dd6985482a825d8c0b883b7c1c72901aca448. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USDY42289596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9d1caf39d9d033e8873d54bbf8f7a70a453b1287d7ad18afdcbc46d96e34bb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM22261854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41a5a30f907eed1441e0f0e73c04f1cec21af25dd35ba9b269ef349c170eeca. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USX9P2346358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa10edcc17748caa299e3efb6e7d05f15df7e66c1426fe5f2d26d76217ec4ef5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:06Z), 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/USX9P2346362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3494b1380cd42e9f73bd0d968ec2ebb899c286bec314cd093131002946e7e9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:42:48Z), 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/USX9P2346363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0707d11e4e47d5f21193be6ebfb3618eb6f12f1eb2aa0d4291df0a3a0b197e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USX9P2346365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbb86fe295e458f890e133f39a8ab110ce8243bdfdf2d4fec066874a2794dba. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USX9P2346366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4933eb5f2082165de003f2f29bb9785895007d33c1ac259e59faaf8935ec75. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USX9P2346368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e42afdec7cd7c5872f7de2cffbd96a7386c2c044f48af4397fdddb777125893. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USX9P2346369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f0ecbc0107e6a3f9bf4469e7051795171aff91b8f37f92c0a9f630f228361e. 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/USHM82468769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5822aa51ef49fc46bfca7b2997cb8c3f774b3aea745cca9e12be69e5a65c53ea. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM82468770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2a2aead820d04704271a0b043a9dd0f08fadb0b5d3909bff0a0dfed389f8b9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM82468771.