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 0x080da956b0182912d975164d451f8cd44484db812082c2919f2d8294fe048503. 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/08aecb1c-52d8-4628-a54b-82a1358d87a0.json and https://artists.proofprofile.net/proofs/artist/08aecb1c-52d8-4628-a54b-82a1358d87a0.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 0x12307344b74d25aaeda2c7af634de6e6b065a17b0bc80fd6246d39fe5bfd842e. 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/QZTVM2263405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082fcadf4c36b30e0f095afbcfc60a9a33afec3f173afb9a5885e14874814ded. 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/QZWV32454304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc233d2bb7c7be825444cc7e4bd218d252b7f5fc18dbe65c44a8b90a4bd2bf1fc. 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/QZWV32420719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb73f5283799a4dbebe72c16e4aa5cceb2fd2ebdbb103a2dbb9eee5b5aefdf59. 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/QZWDE2421419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5311369873aa0cde478dc1cadb978dda3dba5afe7cbd676c3181a56ceba9fc. 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/QZWDE2407126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c55c69f76c0a777c08ea44bfc8947baba0c7b42e2a070c81e7f9505bee6ce89. 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/QZTV32416543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816511e8284296d65ce6f5420f13f9becd6e5f5f17bd6bfed30aeb0f8b881161. 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/QZTRX2446786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c2b8f6c300df8f71ae1faaeb8d6243f5f3113ff59d73c101984b9ed844f94a. 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/GBWUL2416263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389c5a1708fba5a7137ac276e6187e7e0bddab5fb3ff27829b4b1b3815fa7f59. 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/GX3Q92412742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e507aaedde9844793fed17afb795582711808e9421fb5902670ee28b4d33491. 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/GBRKQ2472079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088a7fa6f429cd07af3bc90ae6a62d5645cf6a8da3f3eb8bbf7d0132b927e4d9. 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/USDY41627979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec5d6d4e39553fb8a9b6679b2144336d98e9eb5811d1dc5f773c4f04ff251a7. 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/USDY41627993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7ebb89324d122095f16e6a138df288567ce057c0cbdd3e58f24eba15643722. 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/QZZ8A2411851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b828655f3e0b6f22944bbaf77d472493fa2e5f88c79b86c8d8b45a71419e53. 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/USLZJ2421952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5529192b62513cb06e0c9dccc6f0987540d53f66f4b36bb175dad59853c7d91. 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/ITDO82400811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb649d7945d051ceff24d16953391a8e6f2086e88eae78beb83f773d8e71e9cd6. 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/USCGH2407238.
Have yourself a merry little Christmas (Bachata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0687881a55cd94de811ab888b50cd15d0c4efc76679de6585be5cee027dfe229. 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/QZWV32359928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4563e2547048612561893f1484ae5432d5c5fe48874a7c102bca5c5756f749. 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/QZWDE2373784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea8ad2694181c68d719284b6000501a155edc16c70276ce5f9aba648c5150e5. 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/GBWUL2315215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4464470023b2b007a68a92126f8ea458fd53de8f1708836368a3082b77841e1b. 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/QZTVM2241655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa667a998765d74df7fcb92533964db7830c3e8cf239d927072e14502619f1691. 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/QZNJW2278736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a077ec5f61341c38652c6d3782899ba748d012d3a8a1f14c25748db4a74ebb. 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/QZHZ52273730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249047e00a90ef33d0a344607ff459be13509c11e93da77ddca6f92daaee0efe. 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/QZHZ32266361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4d11a8449a87a422c8ea9b8e359851535286e82a7395344b53a8b72715c6d0. 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/QZES52224777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b69e47d0ecd9f044b15851b88fbb4aa44d5b8a85315feb2b54471d02e177c71. 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/QZNJW2184635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d9102b6f805c55b2fb41246fb70b93db9047fc25914bfc55d3f930ac6875da. 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/QZHZ62196928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5bddaada714f49c8468e98d5f54f9be89f0d3eb0f200dce2e5fb160f9ef5d1. 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/QZMZ92105666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f850de6e916f3961c76b3ee5f132a1ddcf688dfb04a71d05eeacb2f6bffd2b. 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/GBRKQ2551138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437c789f08d9d4d9a272ce0615e0307de6d5ba50540f0f67d2e5baf5f0037e0a. 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/QZZEC2471866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6de6ab65a2ebdf047d351da179258f885db5fea4c7e369f466cd95f89d6b6d0. 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/QZZEC2457887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf4563971c701cd9cb089baab84b6bb97e9fda386d4ec4e4a4bf3002a85db09. 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/QM4TW1617128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e507aaedde9844793fed17afb795582711808e9421fb5902670ee28b4d33491. 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/GBRKQ2472079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda79ce38daf82a7fe95ea3e7de7179badbe63aa4dd91efafe9de8e6ea7c2ef0. 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/QZWV32446061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbd1238655e82a1665b128899a611e0ab8d64c55cc71dbc0918fadd29d020fb. 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/QZGLS2165176.