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 0x8aff663b8cf503317484a4b0c77cdc23655b5660f5cec2709e43890a3244bf7d. 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/82a7fbfc-86d1-4148-84b4-2d22c2b50613.json and https://artists.proofprofile.net/proofs/artist/82a7fbfc-86d1-4148-84b4-2d22c2b50613.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 0x17af348e877dddf63d7a556d5e7cab0689279bc9e5605e93e190194b589acf91. 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/FRX452024665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c70b6b7649f62612d81960e493301fa2d13e376593d19cc9c9c0fbf4d34a2e5. 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/EGA072000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a4543adb4bae789423c105fd75309ca7638aa66865fd85437980e2992f58c3. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/EGA072000369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8694d0d9d67eca1e6c0644f574206be3dbb5fc9245d71c36255c195db3417a2d. 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/EGA072000750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183bb7c8b825ebe5c88ad44f74c9e47ff8187dc8999a8bd77893d6721c0e9a0b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/EGA072000751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d654a1d04f146a1a12429e68e6b53eaa9075e338271981e5639f85a3cb4f415. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/EGA072000767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5adaec2f8fa6eee36eb052cebffb226646f53fcd8d9bb493cf79fc66462654. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/EGA072100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76549fe4c9d40d4f472a323cdc73638d50da2fa4b743c5d29d54bcf8c3c44f7f. 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/EGA072100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b0c1647e7a5f1b04b300511b47ff67733385352cfcef9ce570a420fa753177. 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/EGA072100381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc045a0bfc84314bcce047edd6a7a923638055abf25e680a63c6654a45a4b2261. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/EGA072100872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93407ca47c59c7e5dba26b6a21dc575005ebb8e1c20a4fdd2ac68e535a684660. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/EGA072100953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bc38456a64a28fb2e2b07eed239ac785a368746f6c31303d823206c5834166. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/EGA072200819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee05094289ea67d3a9562e79b7009e5b3779a5eb78ea37ff2fb1b3fd284dfc6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/EGA072300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb92b13fe14f58ad358f013748bec047acd6bfa61091b265372c151fb18af63. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/EGA072400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd9dd2ed48ec99ae43c2ac0233b0d8835d076711ebf7ffe7d699bb0277604c8. 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/EGA072400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ea8557f0f143d4281eed13d8b2f299cf07adc4ae59336431a963e7661e8ce2. 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/EGA072400291.