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 0xf41b1fde316059afaec0ea1c30af1c6fe4be844f7b99e9e32f3ed8a131d3cb56. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c56f54b0-493c-4b41-ac5a-bd9a84b8fe2a.json and https://artists.proofprofile.net/proofs/artist/c56f54b0-493c-4b41-ac5a-bd9a84b8fe2a.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 0xc597ccaa960e31d62791ab25f7b56daac169f34c57ba87cbf3def0f31a99cc7d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZFYY1971344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d8677b0052c1fd15987c7a9c6fc3e9fee2061f00a8d926ffcfb82da8ba3793. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR59R2256478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2993273c36ac4c8728ce4ff54cbbb955fc924c88650910a8c17bd184630a637d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR59R2256480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0b31deb0ad2de2f8e7e2d809bd6a861d924fde1e673b29a9d445f1b071012b. 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/QZTB22209693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8566ce0b5a7fb6585eaffda774b1b17e1cf7015a809fa4f359318edb98e74794. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:34:18Z), 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/FR59R2341100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c6f4efb73ff35f0d9b901bad68654f3b4e4e2026f35fe1c5e88c3a1d6b5763. 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/FR0Z50099837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386ed5839d33c698af15557ca79e9030921cb562ab9f737f1f3867f520cfaa68. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:14Z), 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/FR0Z50099838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ab60b63ff73b8705fcc4adeb68e84af5c173938d988d576dbd50f76b767f20. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:23Z), 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/FRX872392353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734632fd4b02113fc73905c6a1680bc6192a7f0eb0173405c10b9c7c053f0380. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA072379025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a4d4990e0fcff2d21b5c2b33265df5ac6c29bda57584c7b5eaf7ef53136120. 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/DGA0L2311698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171b20d4eb513b1dde1798ba3e42d9a01c0f7ffc6032a20724dd6bff9f02c358. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9L2322756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8177f1cac6823cc3c97f295b0fe0e489c00fb468819b62bb77b9eaac9595cf9. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZW9L2322761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21983d6101130c27d6a2749b439932e83c2dc37f067f72449eeab40fa72dada3. 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/FR10S2548370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff03b9cf675e748486de96bff78474b209ff17b9410bff6eb33f1df5b6518e1. 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/QZNJV2538178.