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 0x5c09ce6b33f04e1c36708da0ed2b1c65ccf66445c844bbf839cefd1d65a47630. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce430289-ae88-48f3-bd00-1975e0b6278c.json and https://artists.proofprofile.net/proofs/artist/ce430289-ae88-48f3-bd00-1975e0b6278c.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 0xfa568b9bbab98873396dfcbe58b5e5756b199c4b9ca77f5626c7f0538a101f86. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/FR10S1481844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3351124c80f40926156cd37593f86b9b1c77397e6d4ab56a4e008f7b08e5f3f7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR10S1481838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468cd8d7d12f193c1d081f431c67fa0b8b90286f96dc9a4ea4ea706fdd53711e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR10S1481839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8f66049fc1fe1f8f1612391071ada19fee055eb86d9632964624b58fbf4d8f. 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/FR10S1481841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa568b9bbab98873396dfcbe58b5e5756b199c4b9ca77f5626c7f0538a101f86. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:07:26Z), 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/FR10S1481844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3a6d536317ae3b73cedff679f9a52cb7faff6d744b0cd47696c8b022ba71df. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:53:12Z), 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/USA371079036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758578dbfaea616b5a490a5c697f6a6035467c56a2b2d30379328ded98f3fc8d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FR2X41738990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37504db6cd30f73c9770be16a73358fe231d3466d8f545e737ac389e6b9a5d40. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X41738983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b1b420e395ac0b81b76d08c4a2da8963eddd541c71b852ab20ce9d17d9dc65. 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/FR2X41738988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92630823f46cd4273fd9abd0b0ee4eb50b43191dcde575110b99a3612b8895c5. 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/FR2X41818828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b14e324312866a0b39b4b5bd9298020c8de7559171fee83015267f8204d15f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR2X41818831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa411434155a61272871bfc5f6db8325b6de1fc01def6a5776eb6f7b385d1ffdf. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:32:14Z), 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/FR2X41818824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729b276815bddc2581d183c43574666238dfcdba411ee85b749d047aee3acb7e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR10S1989430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729b276815bddc2581d183c43574666238dfcdba411ee85b749d047aee3acb7e. 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/FR10S1989430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf85c0379456821441e435f90e5758aaf09dbc95a25d443e05fc9fec4a09ee1. 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/PT2EO2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd682c18762875a6b55c3fa133f9da949be184635fce57ed5df3e373f2eb37350. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/PT2EO2100505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319d956e1db42457bd81e2f00945a03c22d0c673be097e10a6e5bbda76c6f75d. 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/PT2EO2500027.