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 0xbdc15ee70b335c7350ffd94a0fe3faedefdf050b6bc1a71690de213e3a05b9a6. 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/a3a9122c-47a3-4491-b31e-729cfb97f4ec.json and https://artists.proofprofile.net/proofs/artist/a3a9122c-47a3-4491-b31e-729cfb97f4ec.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 0xa0d5a7e2a3d1882a66f03a8b114886e8e7d70e5acc843395ebc637d61cd90191. 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/BC14H2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddd60b6d5cd0c9217beecc9b5cb965ddc1f24402f0cb391e66f5fffa5107d2d. 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/BX3FM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb189e2af94e6480bcb0fc8483f09c580811d27ff983392d612ea59f7250cac8a. 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/BX95V2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77fc403d084c008183856074529aa5cc7ce7481ed6bb62de3e707dcd16eaac1. 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/BX95V2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f71e5ae9adb35ad659361e0808720147fb824474bc847a4e8188f34ec63f155. 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/BX95V2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157ffaf691d1d0a24ab1be35159024b65d15cc6472a6a8ce24efbcf1a25e984d. 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/BX95V2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2341edad90f5a04407d8510819a9f37c5debc2a0ab1f8bd3c200de25fabe3. 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/BX95V2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38966074e097d69cd9ef3305e0ed3599778c7268ca9dfa1519ec129dd4a43a97. 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/BX95V2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf324e2f8640783a44f8f3fa727520f0836322213c273ce74c95173d956bd8afa. 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/BX95V2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57095b290e48e3f451b57d101c65891ad2e5eec0a7c80df83c90819fa31662e9. 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/BX95V2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167f8ac6b9170d7a88b389223538afc4e1f7c760f6930bbeda0d41a11ddc815c. 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/QZGLM2378592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ef7f3321bf7bcbdcf286c9ebdb724ac73170f28d0de809515c9fc454b6ff9. 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/QM6MZ2442555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6ba0595d1d4c670a926328745ee9b86ee9cf29f4bd01cf7798c2da816198cf. 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/BXD3Q2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2ab06a53e5a6bb11e5f614438c1387a60fa6776840b39de883b27ec4fc8a56. 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/BXD3Q2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4731ccf4f6361d719c430151f75dc67c6516427dfb9106c85ccff2e4f1093bd3. 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/BXD3Q2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d04e73f1d98170d41c9b0c934ad99d82b732766d182b0c8d48602a8d853cf6. 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/BX3FM2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a99728b9b6a3b1c94eb1e7d6f11f0ec7c73c147bef7ecccdf199296fb0980e. 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/BX3FM2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45f734517f71be04a8b50f30d7ef4c33cb1404b9f272673bac3a7e0fab7bd8f. 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/BX3FM2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84443188e66c5cb5ea4a0ecb558de9225095ee248c5e1666f98ead87b71e91e4. 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/BX3FM2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12040d0b9b34b5aecb8aaa4e5eb86d023afd6ae35cc4eb3c681235a5cc74679f. 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/BX3FM2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41df8e8bf6e8bacef5cf961b303c61d6b9319337227a7fb01f8362de62e23ae0. 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/BX3FM2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760b753f43881137c5ad34aeb907c017b626e3a9dd4f641eeec0f50b503b71c9. 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/BX3FM2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08f9421cd7aebf0b8aee9be3de78778d503996515d59a5bd0dbc34aad786c30. 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/BX3FM2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f0223fa5bdb63fe90f915ffe0402896504453e1f91b003a5aedf70492502c. 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/BX3FM2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c07bcc1174e67a308d625cdb6391a73269aa8cd464d7534fbdac8aa69720b71. 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/BC14H2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7783fa36a16414844fc7d373eb147aac3e71c50a09e7cab958e13b35b6fe9d4. 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/BC14H2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10795090f8bf70e74dc94538e2df33454b0a163b257619fa83d730fb6fdc945d. 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/BC14H2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dbb47828997bf2b7ee118e6d2df317ecf5790238c444882e7552be14d502bd. 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/BC14H2400008.