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 0x67d15afd73cd3c9c2f05539c7affbbc094c59626da6fd4fe27332a95d4434410. 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/ee5e640e-2728-428f-9d70-6dd1dd5810d4.json and https://artists.proofprofile.net/proofs/artist/ee5e640e-2728-428f-9d70-6dd1dd5810d4.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 0x25e51bb4931d3a25409e0e0ded759ca43d31bc2b101c76f3d0f7802e15a915f7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DEKB72445826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2f6d8bf4365e81158fff877307ad050426f4d4ca05964c7b11efd85ccf6f5d. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DEKB72417923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6651c2699dcd0bda48b97989f24e5ae4be064925dcd2843be210912058c7b1d4. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEKB72421653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4790ab631f8a5cc18945fa321b0f0aebd5fc06387c1c5e03666dd4f4b8dab0a6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ING212401877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34684974377ba7dcff93025476c5e438af80ea6aede27b78d44b06acd3b110bf. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DEKB72432072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433b0fec2bcd564ea8c0124e9bb4c849e487a0d5d92b2afcfa021f3185bc39ce. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEKB72432095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd4ad6bcf3851a0e20245060a2a75849f1c3c5a95267f025ca98e8647f39469. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/DEKB72440133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451f1b7cee30a4b219ca9e047824cce1405714af81496c355c63c11c3276972b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEKB72440131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23a89c40c9bbc8bb1ce8e46fe9274961c3c025f7bb7d82682bf2012bcd770bd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEKB72444069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c7f1d34758aa0be6ce00799e43e6d47e18c961009e79f7c7a0ff5a06997916. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEKB72445827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c7f1d34758aa0be6ce00799e43e6d47e18c961009e79f7c7a0ff5a06997916. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEKB72445827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c76b44be158f9392cc0ae91b7c1fb06e58eb2e940590c9b5f9abc8a4d46f66. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/DEKB72445828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aa2ca897d4caa1d78f12074481e007f0f89834934387134916ce314e2daad5. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DEKB72447905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6888f0209c78fd838c95db0a1c76ad5cf73df64d7ffb1416da14bbddb3a30b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEKB72450116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351993f26bac98ba915e236eb1e14659d6b31203cfe394abde456e51b7d83ee1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEKB72533845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a118651cd8eafc9d1f21d863962862300ed09e236c0d39f7c0d38ec5fa0044. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEKB72535349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559aa2cee125393a3872f261be07fbc20f791c47969e7ec01e406095effa6dec. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEKB72545099.