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 0x2f01e4e4823d1a10b1be9977895314868ecdc19fc991153b42d25673a240a5e3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af0e2490-7cf7-45ea-a4bb-79207b0bd4ff.json and https://artists.proofprofile.net/proofs/artist/af0e2490-7cf7-45ea-a4bb-79207b0bd4ff.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 0xe4d5f36f6df0abd1e09a29036aad16106dc0d54ffc8a0bab899ad9be08b15561. 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/QM6MZ2346864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf71f0e4f253c6e785905ea37854648e1c5d12d3e529ecbd47fa1d342dd97ab. 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/QM6MZ2346865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b2cbcbf2c0350638add04859f4ee59f337b6cb23d9111968d488eb2c8512d0. 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/QM6MZ2346866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3884a985aebab0e0233cf403a32a710c3778ce508f304f14c9c6ea3589488f. 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/QM6MZ2346867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7291bcb3675ebc6f8103a52d4db6f6582901ba47254150e8e100805d8d47d65. 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/QM6MZ2346868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3791c5dac760b6e5c9161f03f2622984ee3a6eecdcb7f4c859334995208acb9. 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/QM6MZ2346869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36020537cd3623e8f843fabfe94974e40e3c0a71b8b96f49be30f3572d43002c. 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/QM6MZ2346870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75592c503d04bcd590ea80b4e07a37e42409916dfaf3bf9c708ff301c2c85fd7. 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/QM6MZ2346871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9b8ff2d27d33fc096aca2475c892a25f3700153d5380cbeab2404d6d1af209. 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/ES71G2418890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd43866b5e4569e505f3f33b1ea62fe17dc7e1517444e0c70376e8f7eb96ec01. 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/ES71G2418889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe74bd4e931c6a4bb85c81022b73ec6894dd0fae0cd69ba7b5407d37a5070837. 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/ES71G2418883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe9d1d64be1ea1fc474c1d0f51ed0fdc989a8b232fd53a1c3c1ddac40b4eee1. 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/ES71G2418884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29cedfe74e6edd6cf9723d1a25fef1ff5b332a50c509a411a98603d0bbfe1f5. 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/ES71G2418885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e984379c6e12a795693ae31364f922c1fcc86999f45c63c015cd387173ff1a7. 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/ES71G2419514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4f0456850684f90903dbb1b98e54f7af6830244f4bd2205cce7a8057f58ed3. 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/ES71G2419515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b2ca1959fe6127b41a845b57b12b9a163cf1bc5fb5a086d54933772a9a4ef5. 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/ES71G2419513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542da7302537ff197d96785344105ec46c213f2601d859836065a29f8604adfd. 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/ES71G2418891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fe55cd1ead57c524b359dd096e3cef2b053fabd09256d388b2ccfad0ab080e. 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/ES71G2419516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daf682b8455f90a856e5cf599891f32c1bcf7e499cce2b5a438529c21c6f129. 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/ES71G2418892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80d63d723b27b335c774d7fb1742f72a3f1e5801816e1e2fc5ae028da317233. 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/ES71G2418888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af6869074ce2b0e4cfaef6b04211351b247f3be377c0e12e6f072dd0b6b6ed8. 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/ES71G2418886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1571963289db9b211f2e32968b214b749549f31e7670509d2a6b3f7cd59e76. 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/ES71G2418887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b374c183e59509d1259691eb40c483962eece0e4fca17d3f703ce3a342804f. 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/QMFMF2330568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eee586369194426824f4dd09f66f0939413bbe6a07c0b915a20bf8ba8240df. 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/QZNJW2359728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c22f3f3fc699e888868d887a16cd2374067df3daba9606c14e5cb0c6dab00. 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/QZW9L2210020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8889f2e101c52a1e0ca7cf67905b56295818d4dd0eef716a5a8a39f09203c87e. 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/QZW9L2210023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a4930a42dfb7cb0420adb18dc7ae62073da58f3074b991d4c1b9a0e20b825d. 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/QZW9L2210024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ed60f35069f4625c71667a4e909e7bf7bcccc582839080bc7e9b751881edfa. 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/QZW9L2210025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ae1775c7845ef22a1ab9a0ec27c5ca918cb7818fdfe9aa781863d2f52d0df5. 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/QZW9L2210026.