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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a9bd71ffa7ea668c62ec934ae6d95e9805290977799da3266885e5b14883fa. 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/d8e83b7c-ec0c-4ff8-9425-4572ab71f54f.json and https://artists.proofprofile.net/proofs/artist/d8e83b7c-ec0c-4ff8-9425-4572ab71f54f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa549fe53821df1fc7542e4ff5a361d2aae0a5520cc4560a7c441d8a1d25436d9. 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/TR8571000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2968e74490d8b953118e7897325e8ce9f9c2213df6cef895ec045465c531e19e. 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/TR8571000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1777e3485940c2af6fef04745b2a4056fb8a1206e818e3a872a6118427c7789f. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TR8571000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa77104fb261218ee2095478c39afa6bea4fcb11b1542f3cf397cdcf1a69afe. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:05Z), 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/TR8571000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72f615139af2ec12a1e761209ef505c97105ce289749fc40c5f25f2167c73ff. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TR8571000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e705913d9a847c76dc6a8ceb784da5b3a92a09cb2033f14d6268ae884c0bb6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TR8571000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a76267e314e2eb8881b64b941a35f5444a076df715e8781ec69a973c985e5. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:50:51Z), 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/TR0531913169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba2152c95616f5014e798544245ea720f902bdeeb6e1a001fb60f631a5017e8. 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/FRX282128154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f205ad7da910694a27f12893ba48467f48d958c803b8a5ee68cbf981991af9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR96X2205794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3ae573c3d03158e46fde013668afe4390a673dae8ccd7424acbd8eebdd72ac. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FRX762232624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4613e210254c95e777c00d66567cc02932c6e48b15aa79b63530a934e39b33a4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DGA052344062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80be60eb4a78e5677892ad67bc3fe012ee50a29d6bb8c166de2414a6c9476de2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:09Z), 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/FR2X42482242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3b76c10f20aa0bece95127525c1054938f3acb089a1638f6a4d9fcd2ca7681. 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/FRX872424333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8021c28c64bc55c4ef8ef15802a35d698e2ec8bb965de617ac45adaaf47f0e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX202598984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5407be3dfbb3857036313a56e19a7317879ac9910ea128d321bf58bf3854f34. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX452500235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2011a57a74faaf9355abb865d41636e97967fa648e27a3371c9b6c9d840a33d7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:04:34Z), 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/DGA062518478.