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 0xb034de8b4f88cba9c42d73d6e604f9b7d7168b12ef270d5597b607791b780c14. 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/537ef9d6-8871-4f0e-8691-af4a247f9534.json and https://artists.proofprofile.net/proofs/artist/537ef9d6-8871-4f0e-8691-af4a247f9534.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 0xa99433b18d7d4a98b11d247d4f113d0f89823588604b6582b595de10bcbdf01d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USUYG1331203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227b48ba47059cd92b66ad5964843fe1d4459ba505637a4d6ee494571e67fcdb. 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/USUYG1082603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd6e60c845c3e7184e963152e7526bb158a8595e1923fe37b02cf87b8ae35e3. 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/QM6MZ1940172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1ca4133fee3635a917d7ea41e4c1b7cc640c2e8eacfe09921e354bb5087553. 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/USUYG1332461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b031ca2e474a5b71d8a525600831f43d3bbb6f17925752a504866f16f55bf64. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USUYG1332464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1f9fb1a40281922cfd73b57ba125adf9a74f60e8beb0d67b8eb4e24cbc7341. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USUYG1332466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5c315fca863a9147c3fb4029c0f1ee8a3b2aa997c68ce1225100d3c3a0def0. 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/USUYG1351327.
Stand On It (feat. Philthy Rich, Mac J & 4 rAx)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8a5c3a4d38ab721ab9421a76b6063004177805024d2157e5629b62acf4d4a1. 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/USUYG1476542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f852cc0de132b1a92e871e578f28ef0b037ffd2d52694bda0febe2490614d8f. 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/US4KV1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa326d34cef997702550e2044d7f67941397f958c837d5d2c40aefb2c3eddb353. 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/USUYG1069780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d95ffcef9de14d99b658d358cdeaa7bf773c8e5c9192ecad5e3e4b03cc627c. 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/USUYG1069781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3050bc1ee96fdd2c11470455e081b2be3f36934db5215e50c8af409ed757cc96. 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/USUYG1069782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421762b134941d08467339ad208485cddd4dd4968e116bd2b96cd92a338ae78e. 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/USUYG1069783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe760934a3781678f187d3b684be0a9ebb1864859da78f02fb55d18f6921e2e3f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USUYG1069785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22605b3e18fb0a038d413553dafbdf4d814557dd3a0a3ccdcab05cbd688a69ac. 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/USUYG1069788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00722a6481635a514feb4eff0f2bcd948423fb6c227096e59accd295c6c76a8. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USUYG1069790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86feb7dbacce578d805f3540396c21f6ab5539c8e50e3549fb523cbb2fc0f94. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USUYG1069791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb262747574411c15f7c2d9c8a7361cb634a96ac96fdffdde7e0ec96af250ce. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/USUYG1069794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9121e03df0f867a4fe30a1d28b40d1dbc8ff93b20a397de8390aaeb72a5807d2. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USUYG1069797.