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 0x69bbcfa216bfb802f7c0b63ac1f4c00f4ecf5832ab4a2e4307223fe79e2dca09. 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/a20f9d37-e5b1-4544-bf67-edd1974f824d.json and https://artists.proofprofile.net/proofs/artist/a20f9d37-e5b1-4544-bf67-edd1974f824d.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 0x64e6e302a9f2f18d87c85cfbbe164c809fc56576a60881c4120944820535c51f. 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/DK5C71500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778758fcbb407bb24408d5b5f9206bd611b81559258b64752a5672698af521f2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DK5C71500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6c59ae6968c406c1f3a2cb0bb96e7f6dd4e1041d7e754eb61ebba6ab37de1a. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DK5C71500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dfc081e871a8dcf071ff40fe55c8640b2107d7327c2936fccaf37c3d471771. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DK5C71500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c65bab13fe7dee5b9812c2ae240fa41b198c9ba0c99f9bf407b0252678d8c96. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DK5C71500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd21cc704d15a31328ed5c42f951da8ff5571948a6998ce8800a5086d07903e3. 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/DK5C71500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ef7e84800feab9a7dd65b7d6f0d3fd27f5e35170a1d2154c5103df3105c984. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DKZQ21600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25988cac94a5c3e1be008f31209f8c9f2e56c338b8fa2abe206271baf01ea9a4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DK5C71700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf544e6651d55e775ba49a9829fdee4be76366566fb8515fa01e55a1508ba508. 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/DK5C71700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aca4cd2e84b20f191d7ae2ae47191d6e06a8ac5f1d72eac9020128f052517ba. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DK5C71700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cb13e2a24b9db05cadd05e7269842fe630a828ce7cfc1f1ee3c45fba0c679f. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/DK5C71700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18368bdc392048111b101363922a69b8e8c986d34cb99571b4e84d997f74e8e7. 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/FRX201910746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f9f1ed08d623bb91dbaf8f33fcd491bdb05bfaea298180a2576fb74e921457. 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/FRX281917214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe1e7c390e4e9bbaa8de2c5aabc3409986f9a0e17c242b1008fa9181eb9090d. 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/FRX281917215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28796d44af223191dde2220f3fc227033d80315fc9ce547e332f746c3eed43ab. 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/FRX281917216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e581c61cff3131b11a8d260d793b3ce74c658206ebdbd13195b31ed46d6799. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FRX281917217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318441b3a14408b97ebebbc92134f75b404eb6c1537f949059ff7ff21d4acb8d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX281917218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8b364f16364edfe72a6dc27e88bf95dac416156d5c6193ffc9c8509f189817. 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/FR96X1942995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ad60b7e613820501f007c6b8689ee94d458b6457bd930875304f1c2e5fc5b3. 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/FRX281917219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953dcc819a8b2b33312d1d2d73cbdab262804f0af722cb24dad7ebb09d41ba3d. 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/FRX281917220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc973d9f432f9ff93ab2b235b18c254af197286e1ed2765060cbc4012904c6587. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX281917221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfa8920006e92f209891663347ff0fc6e402149d3e262dce3e9ef943d4df971. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FRX281917222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4d161e672ca7afdd91425822b32bf6a93a7ac0942505aef6eda539e83e8d72. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FRX281917223.