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 0x0f2dea0754697bf8b6e8ab9af2c7c2ad729f33d42b0f6122da0d3ff758cafc60. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f34826a1-f456-499f-99ed-acfa65d9054e.json and https://artists.proofprofile.net/proofs/artist/f34826a1-f456-499f-99ed-acfa65d9054e.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 0x6514e5065d3cf561888369c967018ed7833a7192635a1cbe26d046181bae433c. 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/SEYOK2328512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59032e6eae690eb28ea8de6cbfc5fb486b8e7fb4a50a5ffbbd2fe31e7881473e. 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/SEYOK2421376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4c346f66c260ed513226e1ac13d863ca622a0b719ff04f3876e454896cfa2d. 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/SEYOK2421377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0191383c77f68ddac2a4490342fe9ec91f9c6198b042fcbd69aa2290c6c4998d. 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/SEYOK2144680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedcbbf9d69729e5aae6c4daa7c7c9512d7d55de5cb300cefa12bcb24b8af53a. 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/QZ4KD2205302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702ff31fdad2a6e5e3670285f9347b31970fdc1b0762408e2c9d32d95658dd5a. 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/SEYOK2200828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4c346f66c260ed513226e1ac13d863ca622a0b719ff04f3876e454896cfa2d. 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/SEYOK2421377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6514e5065d3cf561888369c967018ed7833a7192635a1cbe26d046181bae433c. 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/SEYOK2328512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa20d7adc3841b1110eab88cc10a03e0a2150e773b37061b9ef660bd1a00944. 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/SEYOK2239485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedcbbf9d69729e5aae6c4daa7c7c9512d7d55de5cb300cefa12bcb24b8af53a. 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/QZ4KD2205302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702ff31fdad2a6e5e3670285f9347b31970fdc1b0762408e2c9d32d95658dd5a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEYOK2200828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0191383c77f68ddac2a4490342fe9ec91f9c6198b042fcbd69aa2290c6c4998d. 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/SEYOK2144680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200147a1faa6d1f9fd58a1354094c0649874d94dc5df8ba9325f14249db45b04. 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/SEYOK2123927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47200122e83e29276d24a3db9c7f01c151f14d43cc467a2780ab0c04062f95df. 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/SEYOK2051736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74221c770d3fd08743131bfd1fcca69d2ea46bc52cfaf3b68ccc4a751b04749. 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/SEYOK1949783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89064e6866820a6668c3a516b48842fe627f455b60f642c55e92c1cd0b250845. 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/SEYOK1910411.