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 0x3adb24342f9618092d3144c6b6efcbdc788c687fb7ed2c0d2262a9c7354e0d63. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0708b402-985d-4034-8bac-109ab4523848.json and https://artists.proofprofile.net/proofs/artist/0708b402-985d-4034-8bac-109ab4523848.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 0xc0a855696bedc5ce3a71fc6f79f731912763cb4775c8f416d7f4c9ff4cb1a665. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZES71804720.
With a Happy Smile (Spaceschneider Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba4af0a93f6b8ddfd0f0389eaa0bdced389ee3406f579a1be3c0cbd78cae193. 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/DKG931900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f9eee4ca454db726a0c4036c70747110a579751cdeab2908b26a143da30838. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZHN31977697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c698392818de32026e06d117bb88778c397afd3e60b2d535d585cf047a7b543. 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/DKG932000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8548522ba445f7612e3fc55d03345ce6f3d0ef23aec5a16a3e7c64bdccee6e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/DKG932000601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f37af65e7cd37fb14c9c1ff73ca1e8c355a5b95bb53bb745069a0cfb5f1a00a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ42100912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3256e752e81aa7a414014175c80f23fa8e0798448e73324daba8f8c349a115ae. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DKG932100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7071866c9e36ccc2732e570b2ff6816b9ecb182cd021150b8f028ecbbdd0f32. 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/DKG932100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b92b15e9ef0b362e25c30aaa7ed2a823d680cf5dadc38855188e5474dd395cd. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DKG932200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd08b686d8ba43cc9862f9ce5b562834490282c6873bb415d020567a62435524. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DKG932200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6458e2a671b5a086270616b26e3b448ecf80d8358f0bbb0a4d6237e8101d35. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DKG932300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3ec28dcc2c346e3e24e0b6786d3a3265a2eea55449e2b5274ac0ed99aec0ac. 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/DKG932300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860c01c3fc4a6fd7643966a99870a8a3b8b835544a6ba892fb89ea067b136784. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DKG932400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3e4f3fa09359ad261cec8d808da2b84aeb73f738184a1e9d413fedfcc26c00. 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/DKG932500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1d75eebd8c3abd05b961c1754cfa6007e95dad747eaaeb5b117db8624d522f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DKG932500201.