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 0x809f23bb4c9925e7d8dedc47a02008ac1fe69523174e6525255c86fc9b99c549. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff0dde66-545a-4ed8-b15a-caac01179a5a.json and https://artists.proofprofile.net/proofs/artist/ff0dde66-545a-4ed8-b15a-caac01179a5a.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 0x461b67eb04bcd5a702959b4d5bac6317ae340d8a5ba7628bcb7e23f48f8f20ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX53U2071599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb585962ca9c66817b6b435214468618f481b564b31cf8d5548acf7b97c49009. 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/GBMA22422365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778db32dd4d78bb7289fe4deba8303c9449945f0fee079fa593ea564d5146c52. 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/FRX282455735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccc4e61a0b3404f29594e03fce0cee728272f6075403bb781fce6cb4fa46c64. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKXN22327839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f023c3ba920abc2a49dd6cabe38a47ca54ad2dabc399f9ebd9e932995f5a052. 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/UKXN22316214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d36e0e07c5e9fc38301b06051b7804ba7a8e1647d55be3d40271e065f9a769. 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/GBLFP2306054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8025e9a6ebf6bae16687626355a10528c7b977b2497ba2b0613d6753b15b436f. 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/UKXN22293754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ec94c3c27856abfa6cdd1c72cc5ce5aa3030a83ea284fa4e3b95cffcd9174c. 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/UKXN22246195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece51ca1fef863e8399030b475fefa463275affb39f8c475ba100150bcba2fce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAGC2267400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5e51c65f2f2dc022982dab571f82649397b83a1f0eff12f55770d571b3d11c. 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/GX53U2050699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11a4d0a71dcbac3447903eacc1446d18ec622fbc83aae9d5d2b205b98a8b99e. 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/GX53U2032940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64ec48596012cd9be95a96aeffa5919fd27b7f5e7e0fbef259b962be9585443. 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/GX3Q92065122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fa291a8b014afab5ba902e1b19f9405a92f254768b0ad0c788e1d7ec9a1d4a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLFP2167100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c3b182a9ad784a8b087d74590151ab5deb69686390f7d435d37f0737698972. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBARL1901343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85931dd51d5edbc1851263ac70bf11a9a120ed8c831957a39f0077ee2a2732a3. 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/GBDLM1900551.