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 0xd7719f124b6a2f26f2a6ad0f136603b6c621e6c28136196a69bdd5b1d07be05f. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f35d294-84f4-4b25-a651-70a648a3770d.json and https://artists.proofprofile.net/proofs/artist/1f35d294-84f4-4b25-a651-70a648a3770d.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 0x0f3c4bd84ebf0576771631348310874bf092c79df94b82bcfdd4be85304954af. 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/NL8RL2327753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc2737a8d574fc7926f4e34016dc4b8cd7dbfb7b91989dadefef8d6d6edca34. 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/NL8RL2327756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6de5cb28cfb4419f2bf5d56fcc84fe35e5998c94dc056d786d012362687d582. 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/NL8RL2327757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43edbad0772c6886b2451082d522cf85c3c90e4ed8adc430e6031d7fc7b250b7. 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/NL8RL2327758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee559f27f02afcdb9b48d51621893cf6f4791d0ef4875cec3d7e793bde69e2. 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/NL8RL2327759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbdc662d86b7b039ca6e84876b9a4a22d4bf9c83bb996ba8a8c62285b0a33e4. 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/NL8RL2327762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80afdd55eaa9f7c7ddd62b49ee943eaf637a7b3558010b7a8ddab12a1042d4a5. 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/NL8RL2327754.
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 0xaaaed42c3a1a11c7dc5b6b55c65f830f0aac4abdbb7ddc86a4440b6916d05115. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/NL8RL2327755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57252d51dada73e4b8e8f8f33a65d32968c6828bd52e387e23c9ad7ace908fb3. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NL8RL2327760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef801c1cf641df7af6082f381629df3fb59ca56d615c6e8de4a89384ed0ca1f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NL8RL2327761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02ae0d61c48768a9e86e79e8a2a9492458af1f63905ebda45621237175254ea. 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/QZK6G2267208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd335f0a1130054ae549ce888a4341efe0dc1a092780672fb322a29af7d958b4c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6G2267211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0801b97b367149c8b1ea51a403f015761736b5a3a8274ec08255a226ec14ae5. 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/QZK6G2267214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead8cd4b6be7bdeefeaa984c475b21597b89d59b90b3990a670b51dea9de8d7. 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/QZK6G2267221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea770b16a14b02eff4b068cc82ee31567768b5b2c63c45dab1a261a8330ba1b. 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/QZK6G2267222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b9be72b53190c24b59e797f106c7e1f12000545519b8f942cd56bd1f1d489. 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/QZK6G2267223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2557248cb02a43de9826b0fbe8bdea269ee11df47867881e5e1f42d026ffdf. 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/QZK6G2267224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dde359dcb42b8f11819f9a05c0e1b8324641ab4c15002b6feedb731f51b827. 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/QZK6G2267229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd915af938da1bc2c65f1e271286001ed86f445d7cc28a07ce8d5dcc019d2a8f8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:54Z), 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/QZK6G2267230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826c3546532421870fd43bf0e0d93c0c4c1da77d145ddc95c6ab3fbde6cb88de. 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/QZK6G2267207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac4e76fe31063d6ee7c5c9a4bcee956999709c1d725bfccdd085e13466f6fec. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6G2267210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78dec2dea66d8d2654b830d4d37364f4ed3dbbfb658b91286f417d452d00616. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZK6G2267213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe877f9f3665232129ec848a0eea8317fd39f85d4c1b4e148ed23435cf3c574bd. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZK6G2267217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96653f8cd9cf3d4fa7ba743140d16666f326139b68ef1bbd70c5b4dbc0ad71da. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZK6G2267220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf382608858cc108ee4171c5f35058119be92f1cf81712ebb00d98f2f05d419. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZK6G2267227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a3abbcfc2c9246e6778b135356f4302bfd4169ee8aa547c06d35f0d1e0dc12. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6G2267228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421c98858288367302acc2ae019f8136d89bb87a5104e8538f7ac326d45ffa7c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZK6G2267231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0127c957cd6eca3d222e341e312a85a90d9b28e40252e8da51f3baba566a06. 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/NL8RL2400684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c7ece60cd2990451bfc1931b2e32c5ae79ba85487f8471f378c79d91656b48. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NL8RL2400687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b9f09481de1ddd5cd5969da7a92d94bd2ebd996f428c838dc9d71b1044aca4. 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/NL8RL2338037.