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 0x5ba49559ddad8a17bec6334dc574c23ec1dfc186ae2b4570fa1bfc10a2d917a2. 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/f7baf0f9-b3f5-4903-85d6-a12c53de97a1.json and https://artists.proofprofile.net/proofs/artist/f7baf0f9-b3f5-4903-85d6-a12c53de97a1.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 0xb988cbad1e37185e1ffc2266d1f75df36190d58a3963ce325958f975c9f2a557. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBCPZ1916551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d3b093851eb85df995d7319d7a0f8fc1d28057a8872a5d9bd378659deb5593. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBCPZ1916552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d182b91db6e682bb2358223105e23c186a9a56757040e213444bdb2ab15c6ac. 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/GBCJY2000627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ace87f70932f02b30dd6f466aefd7e05634292c850e2634589efd92b6d1a422. 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/GB5KW2104219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5226a41f91343b0050d6cc10d5f434a1c04aeca09d6ed2e01838ba4bfa0e03a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USUS12100071.
That's the Kind of Love I've Got for You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e3a0e717fd83e558f9300eba842e90bb786b6b9e555050ed52724f90afa27a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IT00D2400401.
That's the Kind of Love I've Got for You - Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07c17d05e811a6f24ab8d499322c593843999bb80191b8fa5d993ecd68195d4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/IT00D2400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ace87f70932f02b30dd6f466aefd7e05634292c850e2634589efd92b6d1a422. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB5KW2104219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105d610700f661c64d9655fbb0baec27282b614185d60ab7745081195625260b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UK6KH2300379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f08bc8497716d84fab60cea4039d719e66b314e9f82634ea1fc8e5ca9b48207. 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/DEW872402512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa881009a4c0d15faa6b22ed2fe303b706440fec3c4b25afb22f9fc03cdde8b36. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBSCL2386035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa881009a4c0d15faa6b22ed2fe303b706440fec3c4b25afb22f9fc03cdde8b36. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GBSCL2386035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832412ee4a7388d8e17766806d66a241f7a99f6c8afb792c7228c055238bff32. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/GBSCL2386034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd0b2769d285490c019d7f96e487c585e6d1c7085e13c90c88ba8e342c9b7e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2295321.