Chris Williamson (born 6 May 1987), better known by his stage name Crissy Criss, is a British DJ, radio producer and presenter, who was part of the BBC Radio network BBC Radio 1Xtra. He has also worke
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 0xb9d2c0ac9f924fee3e4239f8d131a7d588a07ab984782f3dd2ac97ac6f114da6. 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/abfb82db-e615-4d6c-9bb3-94820937aa32.json and https://artists.proofprofile.net/proofs/artist/abfb82db-e615-4d6c-9bb3-94820937aa32.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 0x419fbcb0ca4b5a4bc67a55e37b780c8884285eef4c9dc8cde5fc35ae1ec66122. 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/GB8KE2328485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410ca129fa47d1fafc12cbb0c7305afef7fc739b075bfdfbb702a3ef664bcafe. 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/GB8KE1859807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab28c803394b9201c61d62483596f31612dc9a618bc616e8f14253cf37ebdc2b. 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/GB8KE2203734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab28c803394b9201c61d62483596f31612dc9a618bc616e8f14253cf37ebdc2b. 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/GB8KE2203734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde151b823290b7a4fdc43230f6228abf8c903c622d2146e028dec72aa84d0274. 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/GB8KE2203743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410ca129fa47d1fafc12cbb0c7305afef7fc739b075bfdfbb702a3ef664bcafe. 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/GB8KE1859807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce35d7d7d74c84ab52602f0ddf605d23a894e8f6d9b8ac902c4786bb7a64a383. 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/GB8KE1859810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf18d835c67ae1d1f56c191554ad46d28506e5972cf40e47cbe4484506148755. 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/GB8KE1859813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5171b422e2b4d6938ae50fe5215373d0ddf73c99aa2a201ddd46210110568929. 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/GBARL2000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0d0e7f605bd6bfb4cd9b86e831fc2620077391969d532d96ad2715609f43b5. 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/GB8KE1953536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc144b1713fc190e2b183f9202f7326c4da146abd6a433e264a3766922217f8. 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/GB8KE1857824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf096836edb3905b2d7404fc0d6d91ff0fa8f12e9aca105abd91af5e0b5c0f3e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GB8KE1857825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2d7f8c98e5fe322add62fada8d72b940058fdcdb6e516764e8542b79845cc5. 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/GB8KE1558632.