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 0x115c63312c5529f28f2e07b1da914d3fb2e05373a4aec96ab10817c0ad07b0bb. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1c8dfb8-33bb-4aee-9e30-699ff90aef99.json and https://artists.proofprofile.net/proofs/artist/b1c8dfb8-33bb-4aee-9e30-699ff90aef99.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 0x7e9da206c1d7fa6a49eb7bdfe6eb305039c17ad84c75c8ebcdc978e867e1c868. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES84D2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa11c4378f12a2e4b2a92ec0c2a1dd36d13a1054038fe06af720476d378fbd26. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES84D2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3c0b188834d294902b88d4f30baa754c2386925c04bb3f320802107f79e2f3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES84D2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c33056874ee73d8831ff4ce54c2c6ac75c229dc0f802790c66a35ba95be7640. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES84D2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6212ad23342d7dc5c94c8c32eda317b4cbfea607b1e1234a4b72c44f3bb9d6a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES84D2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f943bb61663006d8cd50d3353b04ca989c3aa281787911c2db74b4008736b0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES84D2300023.
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 0x73f0b2e261b1a68eb3fa10d660ae68edd1b60821456c5ad7a9635192b470cf9b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ES84D2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f99d203a4952d26c8e8b7eaffe5d1b3d2c903cc30e83b0562196c6ffbfb75b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES84D2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ac4201937dffd1ba0f0146ce39b9be7ab6cc3b1c453c2f7f5c09796d85878e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ES84D2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c53856c23ba4e22ba4461ebd987ed8665463a04e5e236996a767f12a4154d3b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ES84D2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6379113d815f76518d24c92f88220cfd270fc583dcfb41ab0d9668215a9957a9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ES84D2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32bf1bd1fdd5f925bc757063d61def0cdf43aa27074aac83d0c803c574e4468. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/ES84D2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c979dbe5ddad0282bec5c260a33a9aa19a0ed71055dfe773115eb8bc5269f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES84D2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55a6d37b7234f2defbd02565874dd22226d5b1f24f1b4c50532678a6294a9b1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES84D2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b4bdf7e9191b2ada167ccdaa57f3f7d637bbac6b496bf7dc137c93248fd4ea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES84D2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c979dbe5ddad0282bec5c260a33a9aa19a0ed71055dfe773115eb8bc5269f. 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/ES84D2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8291f2ca43e41d1d21299b760708f9796f7b3d1ddceb53cbb818decb556859. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:38Z), 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/ES84D2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a58475005d3aeac167140f2a0e3af9ec9ec53b9d8d270dafac241a5aeb9a53. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:13Z), 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/ES84D2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71191f5ee97fd3fcd1680e8ffe58e650ffa3fbee433f2fdc33482d53bab13726. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/ES84D2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77911d349eb47c7b6e14ed7d80425f0cf58a217d584e0d748f46f0c38b6c3916. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:57:31Z), 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/ES84D2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338c5693836014de1531670266c6c59aecc248102ead8d0074d96dc9eacca880. 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/ES84D2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe519649ae9c894c5c85576726610d4ed0d15b48d8a48f50dd50e599db78ff41f. 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/SE6HN2455285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3b4a1ed42990e99dd94a49faa1160b729881b2aa6bab072cc5d4f1664d4b66. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE6SA2164180.