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 0xd1e42bf3f4f53526a961f3ff324fdc5acbbaefe34da6e5bd6f24fd1691e080bc. 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/cc636cc7-3b34-44cd-b5b2-9eff5378c394.json and https://artists.proofprofile.net/proofs/artist/cc636cc7-3b34-44cd-b5b2-9eff5378c394.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 0x081c3c5b7f663bfc9ae286b85c819ee87dfe344835080046d0f5f9a5330e927b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/LBA0H2004434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1a34c4ca6a5a0a50c4906824db78e03bf98b80cc27653d7de4fc21c784bf94. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/LBA0H2006213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf016b0c204dee5e40eb3fb16a2504fbf951a0c0c5f676ff8a401016409b88b5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/LBA0H2006833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e14d7bbb4d545c021343b565c4acc894037a9861713238cc8bc079c84bedf53. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/LBA0H2007001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1c1f2d7387560206558bd1f354787658604bf5d3d2164e9bcdbc41d30ccc47. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLRD52401408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0406612e932d789add97b33694c05b2fa4fa58b207718a29b33643a3604eb1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NLRD52401409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb957aa21d91a747fcff3686ffa13a6c84874245ddd01f2793e5b259b242f8669. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/NLRD52401411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4da7e8268a848ecad1465a6911224470da272c10e969e16de387bbf25572c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLRD52401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfc60d28029fc2a540a31b30ffcfc4965784625da29990552dcaab36170b768. 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/NLRD52401407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba7d08335f1972d51e223f8d10bbd52a8cce583b5efac3b25d81b98edf8d21d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/NLRD52401414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4425e26a9e1244a35d2ca98ab3101acc1e2129d2e7e0cfcc1a38669fa6392307. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLRD52414744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecd2a1a8afa645c0ba8f015c4fe904b8ed82c0448dc5c13916704fb9d2af286. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/NL3M12413070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d50f2a91870dc033ac5a8f6cb57effbb0a2d5f984adb6989761044bab48601. 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/NLRD52501109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2782880b0500a6beade0032e5f679aaddc0df16c3f4bdc1fe358b28f5b137b1d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA62538936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12447efd1533cad9f8160f9f37549207a1230a967584b552d8cdaa60e65e4b58. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA62585263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875512340da96ba702ce0ce0e93a8e642d0ec723e38faeb2973515523bc9ae88. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBLPF2521948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfcd5543b373ae20ef2b14eb30321eafe38755a811f3d987b3daa10bb2fcc69. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GBLPF2521949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efe0a3414433e0745f4d02602d58704af7d42bc4a787b0e0135e5d46bce238c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBLPF2521950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ab00f1ce9cfd96e28a07c3148d797a26d70cd86b738e5c7287038bc78bf947. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/GBLPF2521951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3d84613cbf803e6814e5e947a8eb7855be9ed36a1abd0a719ba10f22e29102. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBLPF2521952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea508d4083419dc0f78fccbcbcccd4e61133458285f2397138b254e24d5e3c3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBLPF2521953.