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 0xc3579aa367f5ae47dc542f2d2111193b6a8f29f08a41a6c00b3a58329acd698e. 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/41209623-6608-4b38-96a0-9686d165be4a.json and https://artists.proofprofile.net/proofs/artist/41209623-6608-4b38-96a0-9686d165be4a.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 0x433ee6a7dc6f359de9ca88c79ccfab70191466212897151e6b2ce47be465298b. 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/TRBFA1700944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774b39fa6608a90ae5f9b2bec093df9de3d0df324b1a4b1a9532a1136d73729b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TRBFA1700946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de7a0bb41efb9e01fcd356f358f021d4a2a11ad5a5e063a0d33f8775b56bf43. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TRBFA1700948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a36138dd7ca656ec2d813cb8f883993387f4b3deb9c80bb8fee7308f4d3a5a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TRBFA1700949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a434d6b687aa040b4d736608b48f85ed8211b99a85a52e0a404c2859881e21. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TRBFA1700953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326af66cf29ec702b488c54ae0522831c63f4e0188609ddb934bba1138088fb1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FR10S1952105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8b0a7e0926de9efa692409d65e0a55c2c1f845edeeb226b3242b9fca2cce9a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR10S1952109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f99f0ad3fce802603c2bf7289daddef71d1809b1ef1d27f30b7c6f1324d8175. 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/FR10S1952112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d2d332dfc192ddcd4638c377afb4fe5b99d03e8c777b6266ab23b9bcb93a46. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR10S2020940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f0bf97982dc39a88c54d1aa00d77c1753ef018f841fa90612516c4c742f4d4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR10S2020941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd008dcbeead7be70f88e18c485af62e7e45ee2daa08a1be99996ff327924b683. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FR10S2020942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436756ac9d3f2c337a36e4d9e51eb86a6ebffc635857349761b145935c672e95. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/FR10S2020943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fd9381df729331c3e854c6f95f6b7fbf5e9fd1fc49090b97cec1f81fc547ef. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR10S2020945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf916b9de4af293f21aee72614bf75c7a23681e8072aa7793836cdeb154e40c11. 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/FR10S2020948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a2d827cd5052be28becc532de785866234400ca6075a6c567c872f76496920. 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/DGA062547096.