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 0x6287427fae1f05f9f0b78cbbaec85b3fe2e56bc6f98a0200df13209a1e4492c3. 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/7625115d-4d34-41a3-9e9c-b6355ab7f991.json and https://artists.proofprofile.net/proofs/artist/7625115d-4d34-41a3-9e9c-b6355ab7f991.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 0xd27a6512567172c3f76016b2c72775c2de66d4d73aaa72cce0cf325d06c68c7c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMGR32093487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27a6512567172c3f76016b2c72775c2de66d4d73aaa72cce0cf325d06c68c7c. 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/QMGR32093487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b3c9c84053f646fef2eb40b07d44dd6d9959f38e10db5e2dfe8bd33227115d. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QMGR32277728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b3c9c84053f646fef2eb40b07d44dd6d9959f38e10db5e2dfe8bd33227115d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QMGR32277728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe766f7e95d99d1b712f90cde6a61bb4d5827500354ec8515dab7aeefd7d23063. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMDA72213864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc939eef819dcd9993436d06fb043f3f40400533b2e624ef181b5abc73733cfb7. 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/QM4TW2341736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3060bb22491ad5eb7f42be0d9c276e5b1d7bc6c9b9e102a67c6c6e8053838ba7. 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/QM6MZ2327434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d41f4fb04db334ab2d1582ac85780d38949d9c21c7ec3f1ed873d856c8fcf89. 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/QM6MZ2327499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dc5b701981d6146fcbe05c29b3e16b349e9028710a70a396bd20d47d5cd9c0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6MZ2327543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe766f7e95d99d1b712f90cde6a61bb4d5827500354ec8515dab7aeefd7d23063. 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/QMDA72213864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220f8913723a8d3d6a049f5c76aaf0b1872243eea46afc6cfd12825727b32ffd. 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/QMFMG2337969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33eb42e73ccd554537107ab68b7ceaf9d9de7de3f77a7b2c544b1c13ecfc655. 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/QM4TW2420769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83a1513032d858ee78991c40941b20c429ef7d766f21be79b18fa04d5a6e37f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWDD2418900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11dd5f5fe1c8bec45f7706de4f242ed97ae587e33672d24e854eb91c1233cd1. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QMDA62434134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08a2f4fea1fe5df57d16111408967db8eda1e8e56ffd7f55b49f4dc406d166a. 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/QM4TX2459110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c4bf1e17358c95df43eaf85ad640349f77856f94f68d7a0539ba07402d1d6f. 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/QZTV32435116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9996493845f86947731b19f9c08372f336fd389b8ffdecd8aafea46bc7fc55e3. 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/QZ2J21504256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc131ee3e2d5d870fc6acabd046a5c1fd7a68fc90a9406dc8580100d94e6de50. 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/QZTLA2218502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c8252a6b4c734f4e14142d2757ef282bf639cafe9ffd0817e7ccd585bcdbfc. 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/QZ2J21505683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970b8a508ba112d2979b58b55826be06c29cf607d5dc99e078dca7d6cd17216d. 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/QM3DF2143134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b2519ffd9ec0520a77ccefd13abb854147ffdba74094db30511806ab92d2a4. 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/QZQAY2128880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c951d3c7b548d697a9cd5118a3bcce66f098e1f98cfc0fa3cc3e94a46568edf. 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/QMGR32205998.