Keith Kouna is the stage name of Sylvain Côté, a Canadian rock singer and songwriter from Saint-Augustin-de-Desmaures, Quebec."Keith Kouna's Le Voyage d'hiver makes over Schubert". Montreal Gazette, D
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 0x6375bc4e0d63b3e899ca755459ad74a14aeb62791414490d1f548a61c9bb5600. 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/ba787884-b0b5-4dc0-a6fc-f1ba16ce2751.json and https://artists.proofprofile.net/proofs/artist/ba787884-b0b5-4dc0-a6fc-f1ba16ce2751.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 0x382a80a086f30bbc99ab97f56b001f9ecc400a33449d689798a506e42562e03d. 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/CAV902300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3fe3af7e5f2fcd1c1389179d7404ea8c55affa1103685249a932c38b2ec786. 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/CAV902300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bcb2baf412c2af8e99da896e889b060bcdf0ae2994751565e6a7e936d00a17. 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/CAV902300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d64f8a8389f7dee70c0d720e9c4e9b4f3e509c096c701e2217acdd239b7025. 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/CAV902300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcbdcca3ce86c74dfc0c76a4bfaebf0a4bb3031680d1dab8302396b6f4b1ba8. 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/CAV902300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e700dc732e4f1802c40e9b9b3e630ce3e0d369d5c35f62449680a2c9fc5f82. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAV902300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8218130d2d1377f37b70e25f1ab85f7b8da695c38db9f37a0db4b2a579a343ab. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CAV902300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77b8c9c9db494844e10af081f9e37bda7ce44c725e044eb58b4360f5908fae1. 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/CA3HQ1711002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec73a0ecbe5cac61531c2db0b6f7b8b88e80d8c5cac3aca7db2d38cfac71c2e. 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/CA3HQ1711003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03db8d7ff0d6f18714f68cddc13302ada42f92a48fec18f5d5976e6fc3acbf1d. 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/CA3HQ1711004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ada913ceda5db4b797c5b07601866eb3483aeb7000d46f8abe3a572842e9aa5. 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/CA3HQ1711008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9c7ef9754951eaf57cee65d04e6673e18a17ec7ebb3445b2a979df76eee8a7. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:03Z), 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/CA3HQ1711010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f46b10e222edade2884bda36b86a0fc036959ffa6c504878b5130a757fc6b. 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/CAL641219931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b2e121b19b8a7bb6cd0e26ce1facc943dfa5f60e7b82cf3d4b7ceb393c5a0d. 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/CAL641219932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd189737871bdcc192ac7824c63755f9b17654a615ec18619b43529a6dee7df. 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/CAL641219933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64b40c0068c0f99972b8153951ae990c690366807c72f1e72dc1d9682a2e8a4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:50:59Z), 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/CAL641229931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a590ca7921746a35afa90723d40f9114636eab591a7a5c260d88f50b39b948. 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/CAV902400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee8618cbc0f3f20cbcb305afddcd664eeca2b69fa954b9c131558e27dc76492. 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/CAV902000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5ebad6ea0cda54f620dd2942be2e7454892ba35a7da3e3e24aaf335cd4c3c7. 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/CAL641219935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc08799270b0ddd920de05c4160051991577be9605439fd241d60ccf6877b46d. 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/CAL641219937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf432a8c5e998dedd3fc91cf5e9903895bc565ab8d9c4ad59ccf57279eb291d90. 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/CAL641219939.