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 0x912424541a75ae4538f37b2e21d7be3011d350926dbd8bc156a2eb8897392486. 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/8cca25a5-5367-4f7e-a028-29f30173b338.json and https://artists.proofprofile.net/proofs/artist/8cca25a5-5367-4f7e-a028-29f30173b338.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 0xf83e0d5dccee85814ec7edab02da63231d7f2e4bda31cd344d9eb35e55aa8777. 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/AEA141405430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33dfb897e95c75fa64fdae001c1d7dc6b44f7a90df3ba5aa05b06414bd1e832. 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/AEA142100466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba136392524e199ac98c0b9b566be22776c42c54115f8cacaab4233fa0c02f7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AEA142200761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca6a6ae2af1864494ae98d32404e5d0562e5f909f4411ba9f609781584d8ce4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:21:35Z), 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/AEA142210835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0699de71bd06dab5fc19c35ddd4b1fc5dfba111e81e97581a205cef85e487412. 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/AEA142300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a02f9b77b603fe154a3172ae8bf1c88e11c9c64b5d0767edb5c1dde869d0fc0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:33Z), 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/AEA142300869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fbf1fa76449f111ea85ee6bdf3fa34567da1c062cd3a565a6c0f98d5497f0f. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:44:27Z), 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/AEA142402155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d37159777a93c570a55a6296e0c8fe740fa7838e9c80add85c14e5cba73eb2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/EGA252407856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e899c3b09d44a0becfae018b5b1d572df23603b5498c8c2c8d33a5bc73abef. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AEA142403696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630948d8a308cc3536c9353698d0f49515fde74cd80301319d0adda9cfabbbe4. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/AEA142500390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf6b0f7c5337e5919b48791ff023049923304ffdc7b80a6ea495c6722c4e11e. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:39:41Z), 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/AEA142501038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda96c4ad8d465358d1ec6068e036b5870f0dd0018f17d2d1d67e7b699627f123. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AEA142502516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a8eeb12305c407f7c0fd32719995c1189d3c21069032b0132dce3f17b32208. 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/AEA142502808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02db213f7eb6cb28ecb090fb774911b4afac563a1149c69aa64d9be471796b80. 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/AEA142504072.