Stephen Guy Simmonds is a Swedish recording artist born in Täby, Sweden, 26 June 1975. Born to a Jamaican father, a musician by profession, and a Swedish mother, he was raised in Sweden, the United S
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 0xde0c3cabeb297181d31bb1e844645c1a9a336d1c07c76e08b14cbdca192c732f. 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/33dd9451-2d5c-4057-ae43-56e9c5e1e539.json and https://artists.proofprofile.net/proofs/artist/33dd9451-2d5c-4057-ae43-56e9c5e1e539.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 0x7be2d9ec43fb824a0d41adefb71f494dd818aca84e39b3783d03d51b5e6c5571. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SELEE9703010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5aa37c7721c6da7f0683cd2913def247077e289c711ce52f791fb1b75c3857. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SELEI9801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e1c4f6c4522c68a8b0efdc6bce137f0c15e3a34d28d4ef99c7d20b72799565. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/SELEE0207020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94128c753d1939ed43ee00c26caa93aff340f653fe686ac8d344952a1774e52. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SELEE0207030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3699471522720bf457db74c6a776bdac58e1413cde5bf0b099f164a0b8632df0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SELEE0207040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5cb78a1b4aaa693877d24b80b4873ef468b87ee2084b78aa79e1644ce0ecb0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SEWDC0400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327b300676352d83e633d0526cf2d09b9b4707457c8c2d7ed39cebcf87fe0a4f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEWDC1000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0083d94d6c240bc84f652f0ae2c5c8a4ffbec4e31498f227a1e8decffcd89333. 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/SELEE9704040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1ea84676beb13abd0c1b19d79213c7c878a95d49a55005e83013f3f84a36df. 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/SEPQA9834060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0926989ce2aec151cdbda87104d1d4b1a68d591eab56877a7c6e0740eeb67abe. 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/SELEA0024050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0926989ce2aec151cdbda87104d1d4b1a68d591eab56877a7c6e0740eeb67abe. 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/SELEA0024050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7008ea4e5603c2009e285795763db7ad8d5054a6c10b9738a91d94a1ac1627fa. 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/SEVEM9801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03804933e24219a79befcaf570c86be01042e779a2ba680c455b27050bfff22. 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/SEVEM9801090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8ca7a2f1f3cc86e26847df6b80e6d7f44bd139307ffbe77a77bee77ef69c14. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEYQH1400910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a61dddf23891fa6d52124c3bfcbb778b1da4984f7a5e235468e066c9b096573. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/SEVGT0604609.