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 0xc27ae6aa92a7adfd0855292db5a8143f6c20e3cde70b100cc5890792a33dd1cf. 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/a6562f49-1d53-4c44-8ed0-f9db305c08ad.json and https://artists.proofprofile.net/proofs/artist/a6562f49-1d53-4c44-8ed0-f9db305c08ad.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 0x93ad4e0cd9e71758cc5e6b241935459752370cee37293bced0bd724558791c79. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR3KP1000670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcec6bb25f84c4fd6ed43402df6db1f7abc09c75d8695daef5be7844a3cb673. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GBKQU1718738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d79802c4e60d57777858cd790c1f307b8583f383b6c0d780c64ec0567e168b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBKQU1718739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c80053c7afa9fab53456089f62073afb10a981f9f71e2ff0d0cfd2a1029d11. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/US83Z1450290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54126fae63154397bfd32ea80782a231e46414b04d072b41ee86b5da66783b70. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/US83Z1450291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6356f9e8e73251b84192f2a6e6ff8d6d4ec87fba89f36f6806cde47331a1d57f. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/US83Z1450292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9753e4020c11c9f1f6ac873edbded1a61fa084d6954d4c27858bcc55f899da51. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBKQU1718727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe434d932a5f5e3ffd98f1e303cdc8074460cbd397d4404ab7672b34aceec9755. 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/US83Z1466430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e73e715318a4924e49be960305cc065c1141e283d69cbe519db01d03cfafb2. 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/US83Z1466433.
Fire Variations (Interlude) - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ceb67ffa6807bd8b0afac48d956c41417b13811742b57ac6ab7a35553913a8. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/US83Z1466434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29101a90f8f20d561a10c5baaa985fd45a1d83c5ab43c5c720bf9c9ecf7749a9. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/US83Z1466435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba3ae7840751ab65f660fbcdc3bfed0d247fccbb45daecefaba21f61b07c154. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US83Z1466436.
Interpersonal Communication - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b53c22037160b60770ec7250198cc8dcb8b53a913eadf4a6086e1d515ebfbb3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US83Z1466437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f68f76e830bb4e90be21e5d5440ffa23fc94c169a7fe4c20ad745181157610. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/US83Z1466438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c270713b12bda7da0a576ef33247808dcb33bf8566dfcdd7330f4696857bcb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z1327850.
Hammock Dreams - Nikosf. All Day I Dream Remix - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447b9710c7ba26665525edab6c496d0bf7059b6311a3321d3cbe9a04923b29e1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US83Z1532179.
L'Heure Bleue - Nikosf. L'Heure Photographique Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ac54e4a21fdbb9c37e74f41f23207ba8601e225692ff0f797ca6baff037506. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US83Z1335598.