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 0x8f7513b9ec984aaba81db3f868c3a44a7806cf3a56d094612f9db61ccd46765e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7751ffd-7190-40d3-8dad-fe3a1dbf46da.json and https://artists.proofprofile.net/proofs/artist/c7751ffd-7190-40d3-8dad-fe3a1dbf46da.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 0x93a9392eda01b15ff75e6aa130e5704ffaf99d3d05eef8c53119b4e015f55996. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6SA2349610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aab9c0a788468f9b942492c6397284672a1d09fe5633dbb40e58d88d20dbc25. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2457304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06897a49da6f3883dcac846014dfacab3dfdde53dbded09a6ad46f949fcc5ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2457305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a32212a847bc5ce6d10ecbc6a92ecabf2fdfa0ae52165b66692faf1838c7f49. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2457306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09dc1bdeed2b4a6f931acfefe9c1bc2ab9f50150d9280c7ab834deabd4eb77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2457307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc849436df3e93f0c259049c98b2deb5cc4b50f89ceb1f8eac16abd4c5c28d747. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2457308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113d94bbbe4357e5c85d6587ae4b02346062c2fa2bbf8f06166f3ba00633f964. 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/DGA062473275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bc69e84ec87b72ed6bd18ccfbbf471516c820370ea0cad0c14b7c26191c24a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2457309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7406381a6363696b9bfee7169850a1f4b81ce6b547c124fcb5751a1f136d8bf6. 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/DGA0Q2480623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6e708e4d26892a906316ff6cb7a46c0f628b814507a246de3a8ae17aebb234. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062473274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe553573d4c97a658be96732e8c2dc1495e5d304a3e32f0b6d138bcf22dbb3f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2457310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ca5bfa8364a3df010df494fcf12fdf1e60f317cadb1ec51fc11ed5030d4e92. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2457311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65ef5465d92c39b894beba408e9dd5bf49b4a570dae7dbd9031087045a6334f. 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/DGA0R2457312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cbc34ee209ecab5f9de5e9b5b54f9d8d12d608fca7e26fc4ed4d5c2c67725e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2457313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9675383a3ac7ffc6954f24730e11fd2260e7b04714d18385dac2d009b37f7dd. 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/DGA0R2457314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23247df54ad6b1c2c5997b4285d50eb1f019618f3af4f4123915e017b15da98. 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/SE6XW2428822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25dba1ca50804dbad50f2a02b86dbab5a73f5f6b6f17b1edb1ee8caf4a1a0f3. 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/SE6QE2429250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d41d9f54edaa1311bee14dea62dc1278a809c722f81f855e993a2288e38735f. 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/SE6QE2429251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a174530ed9251fee254e68496ef6f6ac2df9f9aee8eddb90376beb37666c54. 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/SE6QE2429252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580b23c18d99ac6f57b6d87bb6b76cb22ae7563c264d6ed321f016c5fe55adc5. 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/SE6QE2429253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca6ecd8547d96ce923b6451705b96bfb9797d1f903a9a651eff6b2decea81e7. 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/SE6QE2429254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1658dc979e68a90009c9130a8db0f39d8aee3a8ab7bf7339a39e948354d85b6d. 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/SE6QE2429255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045b295c33002ccf0b4fd4b6ae472cc353f1b5f2349f1f83c0c281a67363150a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6QE2434098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720ba4a6d6e45c48dcaff740af9b07ccecea3f54986454739865864398e79c56. 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/SE6HN2489239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47728e6ca290eb7f1b18e2c45903b6363ea96bd6f54e43790e61f80dcfa1924. 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/SE47Z2401601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc886efbdf546b985a3cb18c93b10dcccc5815a82f1af1e01287edee62eb8c9. 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/SE56I2000148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46211f091f824d047f94d9e0469c2a2ccd8abb7a2c4aa497d86aacc978a1f3cb. 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/SE56I2000146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53485cc16fdd7bc9b7396f27355894110161628a0ed10c7c739f619230b33920. 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/SE6SA2172839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8525d0fca33362b5162adf80b6e589e26b3c40bc112e042902e51a2ea71d66f5. 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/SE6SA2172840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ce36d98a124b57534f1f53c74db7235640654a0b7de15bf18f773ae1580c89. 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/SE6SA2172841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc44cbdec2cbbd991b9c4999f53477885c7e81cd2e664cf5fdd263c5c4395e7. 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/SE6SA2172843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67531d3b54a316ba22a1795cdcc6072f47c88cf60e01a399db4623764356f3c1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SE6SA2172842.
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 0xfe12ac5e05317751c8c2f86026718e36751f08c6463b81bef3c578f62b873663. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE5BU2199778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a278f561233b334491f0e765742c1daece1b659266fd3d0b938684e6909750. 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/QZDA41982387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e25278d40d663f3d86dab9f121e094f3b5ce06f5d5a636631e0c385f051a40. 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/SE47Z1800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1940c196b887907768f422dd9e77c3b0b9b2fb9b3c05744332ea25f612dec53a. 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/USHM91766235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dd1f1e48034d0dc06e49040ae441d9e42d2c5299da7ce9875e7df911b9db09. 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/USDY41798978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe62036f76bce3aa4ecac7b3dfea0515784638fde838a71bb06073a4fe1d566. 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/USCGJ1739077.