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 0x0b624054f52d85e2075026e7374daec08d64e96ef416fb994311200bfe69f462. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fc84f4f-b47b-4c29-adee-4f827696d060.json and https://artists.proofprofile.net/proofs/artist/3fc84f4f-b47b-4c29-adee-4f827696d060.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 0x263c36702e3619041ddce80cc4e981471bf988d524d59990df933f75c4d04437. 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/USCGJ2317348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f4e1db5eee1f50960ad90864cfcc3ff13c38d42c2ae40d9ba01d36a82d264b. 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/USCGJ2317350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79943f6b44c3d929c2ccc802ab665d7b9430289443029cb8e123249306738c9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ2317355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2c576d917546c2ce6889c5b373b90428c69da51e273079f9510474ad8b4a84. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ2317358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd384406cd2550dfa591d25bcad599bb192392b4261e25b20643a5341b88f84c3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ2317362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad049b21baeb1d3784b37b591f0274f30884d060aeba0fdebb0eae3d93d52f0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USCGJ2317349.
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 0xa5b1892263ab7edcdbd46e41417c0011e27a091d3766d625847ee57c260f975f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USCGJ2317351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f58a87c2c9fd32c9e1cb3ffdcc83d46daf48de923169676257e3ceaa5e88d3b. 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/USCGJ2317352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe444abcf0ef4d20ff73fe9105265411b994f036296cd9da24c774402bcfca68b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USCGJ2317353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a2fe3699966b8ad8a19265a335835452317b6e85c061b44b68d56ada1e7109. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USCGJ2317354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855d8277d4fe1230fc761811101502de021cc40bee83370d14c3c6b1445b404a. 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/USCGJ2317356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c8fa2afc4278fbe67c7c26833f15b54a18de7d092bcf5186f264021b3c6849. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCGJ2317357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19510befbcfdf4d4515e0aa9e58a89c6efe7bd10fc8b02781a7e95e5a07db088. 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/USCGJ2317359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca988546d5870cb7b39135aa2bdb9b18dfdac1f2a067f28d96b273a3227cae33. 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/USCGJ2317360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a5d1f2221e39a842874ff95dfe04622178c74293985e111997a23fdac31483. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USCGJ2317361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbf8adb27e0396cf4fc9c8153054a4ef89e539e7d5eca8cfe5816365aec4782. 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/USCGJ2317363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e906ca4b47508d83e5c2f8751e763794c686431d4cd1ed8cf51e2b367a3caf2. 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/USCGJ2360618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa59e1e41b474e1f6fe9307e26cd179e3db9cea8c260fb47d69c33cbdd49962c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ2360619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191a55b78f46d20b5026d2fda5c737023e78252765e73b459b284c653c151e27. 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/USCGJ2360623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eabb458b83faabb6a2db09355184e8f20fab3a1366bc67bc9fdd12f8e2fd8f4. 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/USCGJ2360625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70c2eece0a6b2e16ab8073507cc2e5016cd90a9872b854d413e2cd9e6a036ac. 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/USCGJ2360629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590b124f78d02129ab8b7f1bb4c8e773aca4a80b82eb29db18fdb46ca69f8bea. 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/USCGJ2360630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c5d4e914c0e1c58cb7c02a80c71101dc438fee7db80c445138391db5698bb0. 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/USCGJ2360631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dfeb7f5dc43952fddfb959f6df87785a677c8a34e7ad64f3bdfd98ed1e4270. 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/USCGJ2360634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc4376857a8c5b769a407ba5dce9b2a4d9cbb3b21ca18219b63085b8add5ccb. 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/USCGJ2360636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb3f8771dabd6d4412fea47ecc9d36252382642f37acc70e3f74e4811eeffb0. 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/USCGJ2360637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794267f8288de73ac517dd28f1160a98df5938bc8fcf73c57a311cf6a3278acf. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USCGJ2360620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73453fa4e6949681dcf5a1e771126b1c58a0c740acd78b518bca9a2baee7e9b2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USCGJ2360621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1a41c4e01a8acd34b6486aadd779a2ae63429d998ff498ede2695f7df8fcef. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USCGJ2360622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c44182a98d10527a02c12121597b61d11b4f1725b2fed7eccdbb5d56f728f6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USCGJ2360624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d8a3caf0a323a679982ef8f0102d9271e671c8f7e1e237d54f28d8a3d339df. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USCGJ2360626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0de178c43b597fbee9608d2d08128ec2117ef1031a0d232a100971f1d048b2e. 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/USCGJ2360627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dff83974b7324682ff8cb19ea7dc9a497fd07170e063839e1c853f8c7cf77d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCGJ2360628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf20129f7c5113e37d58b6f9859d95eeeba3ffcff4c098c91ffcc69ef479ccf8. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/USCGJ2360632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c86ca736b4e7f2cedb3ca4a7b296853e313917594542db90b618d5ab9b6c20a. 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/USCGJ2360633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305383cc4fb72f03c210fb9716505c82b0677ad732a7cada39f4749a45d6b7dc. 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/USCGJ2360635.