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 0xfeb2bb1eb3074ffb28d5c33c473b6b39f74a872a8e4223a2aacff5632a2c1e9d. 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/5f839a30-f02c-447c-98a3-3ce9d2bf1567.json and https://artists.proofprofile.net/proofs/artist/5f839a30-f02c-447c-98a3-3ce9d2bf1567.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 0xd2ff25a5560938f9e991ecc55adc4c3215913489d3edc362fffc06a2013b0659. 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/GBAYE1800700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636e25a5fff6686f30cf9d63a0af4d3a1655a2052cbd32adee39dc1e55844664. 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/GX3Q92483518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cfcc99996f22d21ff5fafe5005d0ee3d719e19e69972feb75c0f29915d3fb4. 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/GBLFP2413876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd78f5d4772df53735715de470bba0e7146879b9772e7ed4ee25163f5e35c628. 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/QZNJX2398436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe340046dee8d7948ef3a94ac2beffdf0652600f5eeaac5c0d95ced4b2ff1b2fb. 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/QZNJX2398437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc120a3594cf1ef71b607efc26c367eba686375eb8512eefe5b7b813030befe2d. 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/QZGLM2341465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748220682fff38d8b0970f068a9599e00fd90407dbb5e3d26b6f68c6b827b7cf. 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/QZTPX2254395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50979d6127f9946560225c37a2f304741d9d05fa005a4a5c535fb576d210d6bc. 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/QZHZ42201659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c60a5c20155df1994dfcce2fe543ae5e1bd4f0b64185505f315d3775fb5df4c. 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/GX53U2088847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa7b932b2feba7ca1ede99fca0e6fb23b357a241a988a2c91cbd7778124f3f0. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/GBMA22099324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba9bb93a55de0ef8f290d2ef81bd771fbef6a0538054748dbd94dff84fe8aa7. 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/GBMA22097451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e638c7818a7cfe2bc286c0919930929be7ffb3110c3fbf6be93717b1ad1cca. 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/GBMA22376326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00151dde64d22e621379ac2af1b624429bd57c72599e18980e2739d0353f7895. 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/GX3Q92596661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a78a5dd4b69df337358b0f5546454efac72b9ad9e08f8c58b2e1a15ec4b682. 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/GX3Q92596662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9724b15c0a3ea4869e2a5b4c54683626fb4163a7e18d7b9cd066403f4bb7ee. 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/UKXN22512158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d3d944db57c22580e4352ef1734d079afc53136dc31735c4f269bb2eb7c226. 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/UKXN22512159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa7b932b2feba7ca1ede99fca0e6fb23b357a241a988a2c91cbd7778124f3f0. 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/GBMA22099324.