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 0xde2e62227444ded7377d3948886fd34d9fcb6789e62067a52cb9f985ccc178ae. 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/36a4dd81-23e0-4358-bad4-e4263b3a12ea.json and https://artists.proofprofile.net/proofs/artist/36a4dd81-23e0-4358-bad4-e4263b3a12ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No Pat on the Back for Being Real (Instrumental)
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 0x006e8371dd95dd5d0ee3283f3d55ab9df898b791f524d1fd32ff5f6eec9d67d6. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/TCAHE2307872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b136f4475cf9d831271820ac1f116d85aaaacc24a43ee074830f22c550dd23b. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZNN22395558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08939b1eec4454635078b6d62475ed2e80b9df0b33704f5ee6a58b5063acb5cb. 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/QZNN22395554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d82e0ae64e2ae49548b7d06a3f243e075ffabab193ba14a003d579bae6b8a9b. 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/QZNN22395550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684b2fa33424421f401f784804f0e76c13f84f171fc8516b7ede57059c831bc4. 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/USL4R2031968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dba9484a754b8a1a92113885b470cd82780daa9ff797d46f415801bf161ac48. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJF2546341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e873f08f334f9a96b4eba744df72b393ea92a493927726e9ef1e167162d64d. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USHM92076303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70265c7fd8cb310714ce803e687095f852440eeecfac3075f35914b0d8e3335. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZNN22042623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401d6ae6254ca49c066a8e664de96eb9fb191367be102802eee16b213c7707cc. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USL4R2031971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99654db33a6572f85dc068965d7738557ae1963a3530f017e6f319464be5f35. 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/USL4R2031969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb200c861af19508f161da99d953bbfef01d4b86f17f3edf7dbebc699f95607. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/USHM92196468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01efc1a948c7b68c86af5a9eb29157c02e9f0705beb54a345bde9b516e8a3e57. 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/QZNN22042624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba29997c1797236f1b885dcafa4be0f63da57e220f6fa72a932a3b9cfb8fdd10. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAFK2132712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e873f08f334f9a96b4eba744df72b393ea92a493927726e9ef1e167162d64d. 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/USHM92076303.