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 0xa37546b1b385e46db49964d9ae6a8a5960a2b95580b20b4523257c4c1207b199. 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/9cb83c42-7fd4-4fa3-bae3-7e2d5dab9a80.json and https://artists.proofprofile.net/proofs/artist/9cb83c42-7fd4-4fa3-bae3-7e2d5dab9a80.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 0xd0d228065f564fa81ec52f8bec99a2062f6b6dda821472bfbfd715659491130d. 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/USCA20703823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3ceb5cd3166fb9f267dc978ae859ff40345d4cf128d32c6750101829d63d65. 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/USCA20703824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c3e4a5ea24d205caa71297cf2d330dff713bdc906198a118bad32680b2e053. 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/USCA20703836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a8f6ad36360830eb0b22a2d15ecb04cabf5a5cb045747854579fc9e5d77ea6. 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/USCA20703837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7911b67c16fa016735b20167830c267c40517d3ee626ab1975a129651e319a67. 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/USCA20703840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa575e7096c2b0eb383c6b3f8c710d4b2fd13c0db605903b5082767b9e8ee9044. 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/USCA20703842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa0f5865a2767ff89245f8f5c5936fa3f08e6474969052487d7cde39a3a5853. 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/USCA20703843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d5e2d0f004be173ca7459a57e3050a0b6e46b5006fc204973c212a0d9d6352. 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/USCA20703845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17eab29aa20726944ed3e7ea19de0fad030f2042c38771277e38044e34a9a4e2. 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/USCA20703853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4a73a324fb0efade59f46ee95b3171db91514faea979f51017659f242aaf33. 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/USCA20703854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c40b7c96743360171664db825527ed93e8e03447e9951448e0c86944303f1e9. 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/USCA20703855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172f36cd31100f7ff64c778cace62a671dd5fe63e6e6e0b90474a9def867f3fa. 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/USCA20703867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4ddcd57537795da80ca43b8ad8a636360ae9cb0fe130a2e34668dafd4dca2b. 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/USCA20703868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ba50bc31202b6c84d52324a05fba3b1d48ccc3c697a36b8dd246778ab643b6. 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/USCA20703869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934ef0ec6229903d1a747ba6765b5e733a6fa3e4afacedd46ea1729f3c4f7bd6. 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/USCA20703870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2810d8ec1020b95b87b5a5c9ae2fdebe3a873954a906ee35de98aa862bb8fa. 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/USCA20704298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e6e16b353e83d8c7ce970ef3d0889c57b870fd5202d7584036c2c9b56f667d. 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/USCA20704296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6216e93ebdd5da34e47bbe5483ae0bd99d62ea9586f3843d76b207af45378e60. 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/USCA20704295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e642ef2e7aa04a1de3ffb37856a4c7db8d8fab1190a5ab459fdbdbb73f37d5. 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/USCA20704299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300ceb32320af555ed5960991947978a4aa0676302724faf38a377b7fb381625. 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/USCA20704300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd77d5577892ef6bf4953580b95d1044ca2c9a1aa677de85ec9617b1ee489afd. 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/USCA20704301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c40b7c96743360171664db825527ed93e8e03447e9951448e0c86944303f1e9. 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/USCA20703855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17eab29aa20726944ed3e7ea19de0fad030f2042c38771277e38044e34a9a4e2. 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/USCA20703853.