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 0xd848d76479091cde0c1399428af6d8b37033e24aac03bcb75fedcabcab1156cc. 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/7d294574-1960-48e5-b449-1da6cf990ef6.json and https://artists.proofprofile.net/proofs/artist/7d294574-1960-48e5-b449-1da6cf990ef6.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 0xf1b8ff44791c4738827fde2a603591b147d2ff5a6b4b11de755156df787a5123. 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/MXD782203978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b5bff9615abe25f8fe168e7104a1e184330f5380a131c790964b1b7782dc78. 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/MXD782102937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede6d159a187b8d8fc354893aafc6a8f8af7cca7ee9792254c1848635797e3c8. 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/MXD782301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c529eaa6f9caef7c28b26cf815657e37a193b5f5ac857e53a60250507ad8a5. 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/MXD782301073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf023c02164fbb37c116ec427b2ada3e951f7451cd9033e3c6a3f1eb32f0debee. 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/USLZJ2435868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939bf783461b9f432dd9e39d354ee515326bb4807c762c011dbe797940009048. 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/USA2P2316656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7f4c2648e6ad7136e4951db16d58ff85fd0907a89e99925cd438b378a7c17. 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/QZDA72319053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e3faff4b5daab07d4ce5d74425ba64fabe48002163eadc62e1a9d8843ebd62. 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/MXD782102215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe575eda3ff1b9d683f75683aaa95c46ae3011af51dc67ba87f5dbd2f8c6d0b28. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/MXD782101170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4ec880e675355d0c49bfd603e81783e7ea1a07cd222d7a835b221496ff7423. 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/USANG2132654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b6c252ef966f75ffa7bd86501730934a1481d78553109c4a8a3c187da16cdb. 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/US3DF2092608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbd269eedc8762a6cdf68c47b57cfc637f2a2bc2bf64c913749e8b3dc323acc. 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/US3DF2092610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cc6c60540e2b8d920fdc673d727b65e92832a02c2b3aa27f3d6cf9f6c43128. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US3DF2092611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bc5add33861aee438d4dc6062cf7cd47dad8bf31de218ecfb29a96bf0538b5. 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/US3DF2092613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a7e63c0a5142ee316d085f56eae5fa1070e003b211de028ac9cee34e013da9. 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/SE6A91989925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41a02d7e9909c7e3e4f89342919350671fd00f0b51ee44d29de780083754bf7. 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/QZTV32466622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b47c32c90ff1bee2bec18ad0e44386115d812144c63f21311a1742c604e51c3. 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/QZNJW2420056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b65f9eabed7947033a0d9f3f48d6f8e8f2473f1042d605ff2e446ae85f83ae. 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/QZTRX2473840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b8ff44791c4738827fde2a603591b147d2ff5a6b4b11de755156df787a5123. 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/MXD782203978.