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 0xc8738000f679aec439cda1a61642ba297e1336738128df4d5055a2748a164c0d. 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/9d80db27-96eb-4241-9426-bc0152677350.json and https://artists.proofprofile.net/proofs/artist/9d80db27-96eb-4241-9426-bc0152677350.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 0x092e1bd0b810753fe1f349ddc909c1ca2ec9825aeabfce05d86fb3b97825dcb8. 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/QZK6J2119440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3261f3abcdb94b2d3cd4dd44cca972ea69f203925870506c9baf033d951b9206. 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/QZTAU2186776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c22388aea4978288e80f24ce7fe8c4fb7a986fbb79865e2d7a9f686af6f7e9. 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/QZFYZ2229489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75da39a00467fd9e0341817613bf4f952adb34a37e1b59cdbdbdcb8fb368a98e. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZFZ32205458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7412a0296cbee502e41e811b385a6933f2d5b6604658b42790a9c141a8810c09. 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/QZDA52281988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe325f62d09bbf7d9dbf8925dab2bfde6371b6460407c00d6cb9ba37c8d7a76f9. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/QZNWR2244527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d19ec8ad8716e7c9271c973fdbf6cae059cf578667f93e4c83b7ec31e58a764. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:18:41Z), 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/QZFZ22354267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a950c9ef0dc6f2c8d48519ea6864e2731981053843ddb640c9ecee17d4f494f. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QZMER2380535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413c1e8f7fc8f7cefb92491e546796dd088477cefbbd730042330fd1a5eabaa6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:31:17Z), 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/QZWFL2351202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a00b73193ae0c20cf1b8bc05d706e552cd5156d3f72ca9cf18af3151e59fab9. 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/QZDA42420506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6a6d6296ebe106d8b439e8cb5fb510ddad4b147693f209ebfdc2381c1846d6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZES52473718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6eac96cb269345762703ecbccdbde89ea5e256d73886620edd9f97a5b729cb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES82489598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25641ad13a5057e6abd545e9316fbc552ad549bcf93d16964d227a0a3f779c5d. 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/QZK6K2493954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2d740e424b3359d461af291021aa88f7467fa6b0312776e0f11e497e63495c. 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/CAGOO2463124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176e7a29f77e1aedeb66b07a1f0f959b76b2481557e229fbe2a778b3152cc232. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CALVP2512018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa126ec39c7f3d46383b15fc04378052fbfdcc00896c1df0eee4add29d9f3a98b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:30Z), 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/CBEYJ2525279.