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 0x6ab3d9cf36d5d73df359da032065be61c01348b9531b274ba29e168329bf0a10. 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/2590b483-f136-4e46-8906-26e2bf79e723.json and https://artists.proofprofile.net/proofs/artist/2590b483-f136-4e46-8906-26e2bf79e723.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 0x2eba0c72263341aa0aed19fb07fc70047113f81f7dd22c104032cba274bda2c1. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FRIDO1603790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9531c1423f2e2bea6bac3bb059dff4135b6770eb78d732b6c9e683a3c17bb9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRIDO1603800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3f9feaa95477b01f480023f9dbb9fb59fd3b0a1ad6560b46a1c3129af42fc8. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QM6MZ1735266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbcd5ecd8e2def6b7ff6e7d345c8f9cc0868f39cb6d95de31c6cb34ac0df869. 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/FRID01607000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4df8364eec6e80d8794378b557a347d8f36951908d6a4b01098c067949200a8. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CH6541900481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67e2a271f05e673cfff7ef8a31d474495284f1c3de5abf3cb3c8291a15467c4. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM4TW1922836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0623b03315dfc24df71a747311c8196f0cd0e5c57eb307bc82e4201239a87b7. 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/QM4TW1922837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b807bc080259ec10654117f5379a22ea207d5a7af78f717f33f581edf4fbd6c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CH6541902757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8dbcb49fe269a5cd896eca36d7fd094d162061e4e458385ed457d89a9ba17a. 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/CH6541992628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5564f9af2eee6f45f858c820f362fb28f2ffd17d4e5e06cada0bcc549feb08a8. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QM4TX2022481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62cea6cbcd7ac1e2887e8d64f3378159904571d43a32bbf99fee1d12115fb2a. 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/QM4TX2022482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0254a3e3245b527e5f41f572c58ae400460375e5aa706e3c6de276acfa0da8e5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZN882303186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68740d5bf161e091c4c91cff0a5bb7eccf7d4c9ba20107cad6571c06984ff6ff. 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/DGA072288659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd11cd0a61f7c4da4f6a1aeedf4614b8ee93ec8d8cc299e29ba90610b6057806. 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/DGA082374856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8e303478a7a529d8ec276bfdb8e65b1179e121398a6b3046a15ccb6227dac4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CH6541686578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b99881810b700e5e12adcf7916d912a8aa09f1cc350f03f4fbab41e8486b310. 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/FRX202565920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc8ba03c13c99de7438c12b4584eb1580ecbc21142205a1df2a3681f7027f27. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/DGA052573946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a2be39859b0fd10a3109a60d789be167321db25d77510313f35578f4449efc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMFME2592309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f83331f18f60d927aea660d3986efbbfd13f59b81d2586b8d5570e53da20d2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA072532254.