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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa058a01bc1c5ec391f2e27ba47d2cbe3217a499d50fd2ae96f3487bc36e0ad. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2649cd6e-b43a-415e-9bd6-6847d747de67.json and https://artists.proofprofile.net/proofs/artist/2649cd6e-b43a-415e-9bd6-6847d747de67.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7083e10c02d2b81b6f21abefed001d703dead341c0f0eb44844c9284c9378d1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USYBL1400317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2c0032de8f45023a753326a5b8f112141ba3b75797e6edf971775b6e7c5124. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:47:52Z), 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/USYBL1400336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4119519bf60a9b97dfc9553864e7c1c38b05945072563430f24b293786cc22c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:23Z), 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/NLZ541500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d7d3c54c38ac7025984e67845870f6562fbc627bd308a0e7c32b65bf1feddc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:54Z), 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/GBJAJ1600882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78adaf435f18bc9c5f6d01eb44381bbb70999198fa672ef6b6f3ace0274d361. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:28Z), 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/GBJAJ1700716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51084b347c2be47fd5dff3ec8a0f111b8204621bd69d383fa681e8e1c3f0619. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:15Z), 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/GBEWA1801040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb28a96e59fb5f3f93e4e9a2e591754dfc0e2a56b6f615a7e2f64158d28d85a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBJAJ1800820.
Head Over Heels - Tim Mason Remix – Extended
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2437e7a8c521cae3612e64ddf8a9d08c78337309c18b7169d25cfc14fe81511b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEUM71401321.
Head Over Heels - Tim Mason Remix - Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5781c4915ba3d4ee3e03af8ebd6347de6419c26b0e6999836b1e9836c08e5c22. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEUM71401320.
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