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 0xe0c31e9208f9d75401d2474e73e6525c388e81324e74c684746e68c236fd4a29. 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/82f40a0c-dc78-4a87-8f4c-79eab93d0bce.json and https://artists.proofprofile.net/proofs/artist/82f40a0c-dc78-4a87-8f4c-79eab93d0bce.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 0x16784806b4f14600d3601aae4adb75dfca8f9bd44dbdb88e5443b504c4a57e50. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FR10S2240070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f102c3bfc21127585b3336713c0aeb302729be8f890e9c67a38865e43e03df. 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/FR2X42258652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcac081676a9ee28f4fdd9477d36697babb892dacd99dfcf13562590e8b2cc5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR10S2255719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599cd38d380ff66bca641bd74c1d3a37a16f3846cb9296139147c9871c070f13. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FR10S2297165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ae3a493b02bcc79489a46aa54e6236209ab6f1493ad2fc4419255a2b43e459. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/FR10S2297558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21a65c81dbaaf73b9258710119cddd365ad15817d9858fd3ce99c0f5b2dbf42. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FR10S2297556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b9e3679f3caddcf87c13b67f2a525ee03a58312e45e8ec9b2a9d5371d3c7a1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/FR2X42235820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ded8640e2923222472f2feab8378b5f8c1daed0b3219ef40a8169222d89885. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/FR2X42257766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73896d6c0e00733a984056f33f853bb4e73080355cbb1398f5e61142916bae68. 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/FR2X42257754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66c182c3a3d0671d512b5bed00ddaf189be189327bd0d42b01001a8a777b1e5. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FRX202263336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe645fd2bb64f13d5ebc7ec735f9c48b2f3640573d2581df323acf775c47706d6. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DGA052203088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc994218eaaf77990c0bb111d2af0b12475d2a11dfa413b5b482ae39eb8be6d00. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/DGA072281373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea9c1a7d7351a7888f15a93a63b8c323fe47c58692720aa501fffb6aa1fd782. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FRX452309637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1c5c626ce7a33d59fe484fd04d2b2e049e55db8b3a622ed10c17cc36e6e082. 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/FRX762436326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cb4ed497acd26a7b8aec7f290d5187f3e1357e056c4d7f8d0d355a9b8ab3f1. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DGA062429487.