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 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 0x9849e02f259e63700d16f13fbabc395e6e090ce95919d51dc92bef9f500e5e76. 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/3ee5803a-6f97-4edf-a839-d020efe68aa9.json and https://artists.proofprofile.net/proofs/artist/3ee5803a-6f97-4edf-a839-d020efe68aa9.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 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 0x59340f0c9ce1d0cb8561030de2dd6c57e0793a194e8699a625481af3ec101c0b. 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/QMBZ92452468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87ccdbb261f9433d4b69e8a7982d7dcfed853cce58bccb40d8e819b832b4997. 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/QMBZ92452469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bc4dcc4994ceed5b1b4b891d2745a567f95f1590d04bab675be35f6aa70d0e. 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/QMBZ92452470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27810f4c077baa609af9ec052ef0ec84d8547733c973ec598005a4d8e38afb97. 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/QMBZ92452472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fefa445730d2766e9168be8283cc70ec0a747968674a6448cc331d0ed4fed8b. 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/QMBZ92452473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a8c54d091e30192255b514a7ce185a624565758fffb18017908eba95c03904. 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/QMBZ92452474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5263c0b08e562137bdf22a4742554da17f40bb22e4bc263ee6241eb0e14c82d. 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/QMBZ92452934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4ac760c2d2c585ec954e8a8f03d6dd0cc37cbb590a56222b7ac7d5d33833d9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMBZ92452935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5460401e53199ee39192379b5c9423eeb72271470290df81c781452b7f790362. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMBZ92452936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0a5e759ef282be0fe5753eaa46dd92bb2b4a07b599df2b4835db8a29e37a39. 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/QMBZ92452937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393514ec7632a13e29b8f088d3063b5b97b0a52257eb4860c34c377379db4dc0. 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/QMBZ92452938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fffe266236c7ec2f513a52f8dd5ef399bc3a7708cabf388f4bbf19aa744eec. 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/QMBZ92452939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1dd6dc31453f61ab692f26fe831e3c31ba82865197ae33eb887917d7f2aa39. 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/QMBZ92452940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a843a7e470ac4fa3b0a52a289513013ef42d406414f188c1915f89da545b66. 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/QMBZ92452941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67db506eb0045fe28c0e959aa315771f3c55dd9f6309b4d4d017717c02ea9741. 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/QMBZ92452942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffc476945b12cfe97aee670e5bd0a82f2e6650f930e73010c9e11d56002aa5a. 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/QMBZ92452943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14b32c072d661548957261fed41aa914d9f093d3f38b70f924f7ec93fc2967b. 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/QMBZ92452944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b4de6bf89e4cb5beedf10e21a82913dd60dbd5c0d503af7d3986d13196b1f0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLAF0710142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc31d0a68faf27135468f18be185b2809ed20cea66a435309b3a3f7d5b2c51d. 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/USLAF0710143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63646a9f5c9a56d814201d6ff66b8d565e3611f47e3841bcf540e9e6dce130ce. 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/USLAF0710144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96287953b562d0769db4e102565ededfd05441387a2b8ede8446e2d8fd1a07cc. 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/USLAF0710145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb655d431784bf4004cea3923e602620346f91e46fe37ca382833570ed10c2103. 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/USLAF0710146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48342660ffc86a82925e2d0b0fef91d69f20ea77d3f9d5ea69fad655814a85f0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMBZ92457467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7476161a0df5a3c0e0febbe15257a48fb4828bfee5756903a21f895fd1cfeafb. 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/QMBZ92457468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2703d16eafef4fdb4026aa8fc2c756609638bf5493f83ce0cf6df9a5d2103116. 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/QMBZ92457469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900750b4eebaed2adacfafd9048e1662a3c4cf0d0663b771a05e46bfae512a41. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMBZ92458167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0203c31ac0463170298103e84a5796b5d2c6ffcb21a15467d4a3935316035e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92458168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2173993250679418763b7fff1f758ae776f917ea5a0162b10b7f48a8e928108. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92458169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9a647b384cb99c51b22231a08ed7b5f64271152c542d3a047af8a00c509f05. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92458170.