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 0x7cc8a18dbbc26673148399b014e6ce4194668cd957cf7869bf1b19eb89c07857. 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/2f7bc858-c31b-48a1-adef-eccccc427df6.json and https://artists.proofprofile.net/proofs/artist/2f7bc858-c31b-48a1-adef-eccccc427df6.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 0x08e3cdb214e4e9b3fc077770d253ef97305fa611c43057018d45c46564845614. 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/HUAC60402117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cd182845bbb6198d0d63e593aad4c519001aca3669524f69558ba23f84be33. 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/HUAC60401608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf051c26d77d4418bbca55f6ade91d72496846636bd89592d70dcc90cde86feb0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:39Z), 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/HUAC60401836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ba672809cc68fae10510dc4f0f04997fa210b0f253714bc86a7733a0b98d3. 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/HUA000000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbede650153068ef1a116a45fd32b739ca7fca06bd2df69de121bce6056e180d7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:33:35Z), 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/HUMAG2005313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5962b4970efc1f10a0aa57d25ed967a03b0f666d33384ae8f299cb3aea075bd. 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/HUMAG2005318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ed945900fd4a874a2b7a4754e9e09c50459171f48cdf1b1f6604041de9b38b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HUAC69900176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cf4cc781025ee5ab732bd2f24acc5ef4438b7b7667b17973aaece19daafbae. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/HUAC69900177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5602244821d18cd303b612c2a04ff4aa7a370ffe26b5554350be6396c856d3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/HUAC69900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742d56ab62c34843789eadcff5d410ee6c5c4511f481d31d11a9a99e190288e6. 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/HUAC69900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cf86610ed46d5ab4290a3accfd41db54319cb436d4a4e4df5c75b71283801a. 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/HUAC69900183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d12b6a796ba1e15bd9f6dd6e70c07553f43f7d74ab6a557b33e7d5ef7790c7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/HUAC69900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffee5537dbdba2fc6b6df70cdd4436eaec3e0a360841e4a6b774fd47084faa3a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:46Z), 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/HUMAG1500292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19994a7d14006669f910c72837bfed694b41f15fc94dabcf0a2f58b549383fa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HUMAG2300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875aa9887c1d12d2a13170eab07d2afedefcf63ccd42db1ae4f9510f2060f3e. 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/HUMAG2300324.