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 0x611130b797fe6603ea27426408081a2704b537b76b6e2fbe38ff22e04318cae1. 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/2fc3220d-b57b-4869-a167-e2fdaec621de.json and https://artists.proofprofile.net/proofs/artist/2fc3220d-b57b-4869-a167-e2fdaec621de.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 0x285a78efe41712f19b7ae6e0126267da5894305c27c3d109d699fa96b895a8a8. 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/NL4NL2153718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7ad8429ca622a56b60bc588717c2bfc0db956e17766ff0b71da904a2c4a266. 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/NL4NL2153722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c92ad1ab0a355b597d9f133ad7d471acfdc9697f09ec732704dde78e8f3fa8. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/NL4NL2153716.
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 0x080e97e1660ddb1fbc9b613834460208b61107f0e79ea1c1f5327d0e4f7e29e5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NL4NL2153717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ad038c9d3cf4fcf9c43830bcfbfa8a5e652677524431de9b9c903e0abc9db6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NL4NL2153720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c9ccc0454f8d2a4de1fc8bd8412beea4d79b3310649a8f0806409070487bdf. 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/NL4NL2153721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f1b35f9ffdef58dd30495f6db848df793616e8c379c04e072510e004629b0c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NL4NL2153723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01b0d8b408dd1dafeeead3831d38d7309e3538d51764fcdefb2eac7d6c64f5c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NL4NL2153725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1afcb32cd948c1763cf42644e235c5ecf29375f98c1f95912a443903b59825. 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/GX5MY2308551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a162dbaf55100d7f1ff07d42702a2c5fd8d2fa24b9d497e0541eb8897da1346. 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/GX5MY2358483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713f0babe2c75d8d7f723e2e8592fd092fe903f920ba883fa1b38b2f3958d38f. 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/GX5MY2321687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc50f48b105cb5a451350be60837444446db5d817e4c78bbdfc0d059f1697fac. 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/GX8LD2316904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaee1bb9086189b03ac857a05d7e6ff9ade722079760de055c83a5a41db1915. 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/GX8LD2349905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99029365031fa9853be1f5f47c78606df1bb5ee97ba2d1f5e081821e04f7161e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX8LD2325024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce65e34a63f9e54798d3aa10931c50501bd8f7b7178c758f73dd0f7bb66e4b1b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GX8LD2378915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303e46338ecbf071d2c08ebb03bddd650966d804610f7688316ea853189ead9c. 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/NL4NL2217078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0dbfc14966d8d7fa4ccf48f2fbdcf339248c4dd09bb8166f9e8b087c208de8. 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/NL4NL2217081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb69286c24927bfb1c4c98f2ed60bf4d892c94416eef326b30581b1e61a7bb82. 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/NL4NL2217080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69df56e0c9eaf2727a5e94e2258d306a2e82873b6bdc958e465f362bf1af466. 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/NL4NL2175724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217d549052906d6c3f5db2a1bc910e9ca52b6f79d8935a588898b0eb3efcb5fc. 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/NL4NL2168282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec680f3dd9c7d35cd75e0f902054649f02b390669e21234a8a1fe61cbbc1906. 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/NL4NL2159942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac82573929ae8194c4f56a5bd5fe6368c19579d4ff5295dba0eb871d2f295b62. 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/NL4NL2139622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77d4ecc6c145a1201de0c3bfbe20aaf6303ccdcfa79fc9b6501174919cf3d67. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKAZA1900149.