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 0x389f8bd0007597d36b9c5dae53d18d01f08d26b062bfb60fd9357952532771ac. 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/03cc9625-3a24-43dc-906c-e32d7e40a0cd.json and https://artists.proofprofile.net/proofs/artist/03cc9625-3a24-43dc-906c-e32d7e40a0cd.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 0xa26b6873e3cd1780da13d5c53bf261797312d21166112030c461072c8c8325d9. 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/QZK6J2409350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac126bffecf96f76c1168da460e506f3312e7e2ef8274f060d2f6e1b6d7badd. 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/QZK6L2498673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305939a027155c22b07b740f863acfd9d091b0719b0529e69a2dbc8d4a56ebfb. 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/QZK6L2498675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd402f74a8d9b0c2f5001faa40a69201c04c2ffa17415cac4395a740b8ec018ea. 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/QZK6L2498677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3b01d9356cf1c7037987b414d728e03f74036803945a63ecfe827f22c9ec10. 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/QZK6L2498681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ebe40f214321cb8ecda99075474207c72719c04f8ab516cb17966fb21fe3f2. 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/QZK6L2498683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb48979131355d8e7173d0f8e4aae7bcd79c31e22e65bcff10cb1cb07bd76bab. 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/QZK6L2409751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9621cd3d3872f4bd3e9ae3ba68161cdfe36c073dae9ed76cc20e701a7b13bc19. 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/QZK6L2409756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b039825ff27129e2e5716fe78b5e874c7a0ee6001c7706e36c4876f21240e3. 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/QZK6M2435369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64343cc97a57e7fb59add77f10410a8d95d470015df2c147611e54fcc3c6f6cb. 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/QZK6M2435370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ad56188aa4c069b216d0a135af1247224d27583eafbf8f25e72928274b510c. 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/QZK6M2435373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6a7bb4107b5645a8ef2dbaeddb22d4b23e4c2b815734e7db06dcdba51d0277. 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/QZK6N2473058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deeb35c25481daf16fbf5a284fbc84d0b200974df8684c03c33c0b1caf55fa1. 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/QZK6N2473060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bd9dea6ba23bede0c578d66486e743a4c423b3eeab67c3f34611849122b52b. 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/QZK6N2473061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea62225051070bd8e0892cc65dc9bdf87e87ff477df95f2f5569980375b1913. 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/QZK6N2473062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6e6591d3eb0a991e7e3ccb7e6c77e75d8d1e0c8e928c8ef76b5f866b3de7ea. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:04:25Z), 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/QZK6N2473063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d8deb1c171c02ff1323f62f84b77b58b25f7737cc7282defc0cb974925ebb1. 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/QZK6N2446722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeb6eb8149671d75658928b652b24614894bb8e32b3523259f0db48026d3992. 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/QZK6M2485914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf443504b3d4b2768c76bf82749d81d45214ad6ac5863250750f50846eec4a82. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZK6M2485915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aa333151f7758f2f1b419ecc4fdd3438f63d7f74486e80a88209dfe95e7263. 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/QZK6N2457356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811f413d052859b1248a7652c5deb812f0476ed7f9c0408031e1cf08fa57148a. 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/QZK6N2457357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6cdd6387072f7f57ca3b1b301f25c609275e67e95d1ef8c41f5ac42963bc1b. 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/QZK6N2457358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0380664dbd43d034557a58f5ae62cb486c88c17d925e27e03358a2ec46522b1. 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/QZK6N2457359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba6c75abfa4de582485a3c9efea5bdcdd9dd1267cd04faae2bc9e6ab6af38b0. 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/QZK6N2457360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2d07305eedec058270eb7a4728735610b3a6685c666fc05b386a5cb52575b9. 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/QZK6N2457361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74265727cfd86e40485bc598e155750809d9ebc94cd5f348cb3650db241964d7. 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/QZK6M2450187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7508df13cf9d4d5d69a9a542a03afd624fde072397859360181fa6e96815527c. 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/QZK6N2426144.