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 0x240a504bf7245065aa4779ce4c0fa02f0b641761aef876df3e1bf7e93aada7cd. 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/352ed91e-7486-457c-9164-faeec229c412.json and https://artists.proofprofile.net/proofs/artist/352ed91e-7486-457c-9164-faeec229c412.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 0x6561daa5f7fe96a89a1841c81989f4207f89574e664cce9f7c69adc1f874cc9a. 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/NLRD52257919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20a25b89a45fe7549f49d344e7856f2fc24ad32a8619c1085f26f75e8f8924f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLRD52257867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a2051d61e5bc16bbe749dfaaebd08500c4c471f33fb12608f390acd4d88e9b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2382861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb29ce09c88be400c2c3c114279e9620abcf17973b30317d0ea774f12a253af0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2387411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20a25b89a45fe7549f49d344e7856f2fc24ad32a8619c1085f26f75e8f8924f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLRD52257867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4937cd7aabf3f4e20361337bee659dcff4481ad3632f99b2c175581ee2d975d0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52257937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6561daa5f7fe96a89a1841c81989f4207f89574e664cce9f7c69adc1f874cc9a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLRD52257919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20a25b89a45fe7549f49d344e7856f2fc24ad32a8619c1085f26f75e8f8924f. 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/NLRD52257867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4ae69513fb20202ff2a2bde6adf5c9641ae306a3fdec1741db29b9f14522ba. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAGK2288639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c6a3a592937bfe9b4dcc38e66c6340a012d8397ae27206230cfbaf38b35d4a. 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/USA2P2215548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a1b54ddeaaeaa2e19794c8d958100534137c36f5c48cf0e390708d2453d8d5. 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/USA2P2215549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcab21ccd53a320a22634f018ce638f4b77f404c3e770d26aaef0101e09d3101. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2205628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6757ad2a8d9906376b4221477a257ec61308fa8824642453bcb51a47fef7cec0. 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/USA2P2201931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa883729d073d2a543376ad05c84df3e691a045c6f97638b8bc5654f74f4d6070. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2158109.