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 0x85baf55171d4a3b671b646486e5a476d51df8f11f3abeada153f466a06d3c38d. 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/76c9dd50-4e06-4a4e-b9bc-9de46b145d28.json and https://artists.proofprofile.net/proofs/artist/76c9dd50-4e06-4a4e-b9bc-9de46b145d28.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 0x7d4efe55797faee3fb34a68861bb5deaedf01000aa740f7084d922355bf6a2b4. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DECY51181040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fba99cb9f53775e12aa80889a45f09ec27482f4db1e9a25fe494ef00ff4ad78. 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/DECY51181041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea696d6cc15905dc46ed3541a96ae95cb730735ef77a3534d9c20be72e9b4e0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DECY51181042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef80e32b99df29e6cd9b925f961320806128d358f8c1ab5ab599e1d3441b3f4. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/SE5751894633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5edb3510150c5a9001acaefc855180370173a089e1f8ff62c9b072a67152520. 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/DECY51681111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27747081b0f6eea47014d0f0d86ace256f2e0f967e2290769d9b92a9196b65f3. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DECY51681112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd383c5bb861383107534d1ff06110ed1603bea5b6ed92296d5049047d4f6eaad. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DECY51681114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ef827654a95903551482937c9d69e89eaa761f07a99e07362a63c50afb3a82. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DECY51681116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a38f373003a00caaf1b17549ba25d0daf6ab456bb281c5bb15a53c08b0f49b. 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/DECY51681117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6497e6039d5711e7856163fe5ebb10929ee86366e99a0b5bfe4bf081fbbcdd89. 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/DECY51681119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5512d81146fe21b4fdb6b647980df8f53352c0d39faa3e714bfac30c11df03ad. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GB2SA1200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d78b658a8dd262913e7e0edf9d6e27d9698777fc4a1ef1291fab6a204da9fe. 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/GB2SA1200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ba406094f4a793401ade5df9eee54c330a994af4eadb11411fd9b6a51e7adc. 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/QZDA71926807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4a9c92ee4822e4dc76b25f97e56bdd7241af7b1b778c6bca2983dc1e3308f8. 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/GBKQU2144188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bd794e70f07cd49a2ae146d2d46c515affea2dbf54bc31cc64a22114606740. 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/GBKQU2144189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5483d08ddc318674bcf51795471e6cb61bddc24cf5de77e8bf2657d6f4a2312e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GBKQU2511696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03367bdd6e3cc36874ec23885e3c750e698916e6551729d23e2ffaa779c2f6dc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBKQU2511697.