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 0xc98f6fec3c7bd3473a71abb02e1d31212e65dbc6ea6c614b37353e79eabb3855. 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/e3911bac-5b6f-430b-ada9-7910d369639c.json and https://artists.proofprofile.net/proofs/artist/e3911bac-5b6f-430b-ada9-7910d369639c.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 0x6265fef523fd5dfd57ba73219789ed8346bdcb698703c455fe152f1a38c72c37. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DELJ82022659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baa9c2040d6c309b3ed7254d9eb557403a9e13fe777e775de1aad2b1cd49c64. 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/DELJ82047455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3846105fdc733fa5dfdf2eebf6bb6ccd475aa6941f443e9dfb91946c4f62d380. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DELJ82047461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9c2e7c791d1a7f51bde7325a8a0c095466cc5d0a26a857def416cf35990440. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH7812235223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7233eadee810fd0eef0388ab1acb7f022c8232598ee014687d843145a04f7e1c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812231247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e60e234416ca7c1062a977faa28492fcab3f8852691890b696368bb6f02cc51. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH7812235064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa155e17ca1ff217e6e9dbf6b9ed22627763fd1a144acca169473b8dfb570ccf9. 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/CH7812233792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ff54f64125036155cfa88d54ddf00e190ae8d44395490b3f0f505c52dc078d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH7812232595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdce70b05fcd30a356e5ae7eea393453c58b4adf248d7c797c2a400c4cc698b. 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/CH7812235225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3328eb4cde9cd5581c9f43fb876f38e9d531423fc231199ec50bda7485a9604d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/CH7812235226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfed289a7ab680dc94d3fdc6e75f2c5d99389d30aa71e451d0045b19c9ddf2bd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CH7812235227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aabe8e50710b92e813b9918cf6a3c4aac43841106cee3e2d23b6a0908e626aa. 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/CH7812366052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b12236efc1e925c2d5c50e5efbf278f5deb94ea4045e8e1c4fc3239fe519fd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:34:51Z), 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/CH7812423243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4207c35d906909b517d1f1cb68f9eb9cbd154b476d1d9bd578a6b72f043c9677. 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/TCAHS2300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1226e00f064015887fc8e1fd9244a2d7a48abc52a2855efe8f2f7d8ec072426. 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/DEPI82021646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f800cf47c26d1bb1beae50234eccea738a502853d82f2eb26971afb97136e0. 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/CH7812353162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761b3b2846f50782370ae8d2f36d2035055d61d252a4fc655b8d6b1ec5c2b330. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEPI82021656.