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 0x0be0bac114fa6e397f2ba5d3f60edf9639f2fdb70dd8f08e7e1b9953b7e72352. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c7c90e4-af9b-4d62-b05d-881434e457d4.json and https://artists.proofprofile.net/proofs/artist/7c7c90e4-af9b-4d62-b05d-881434e457d4.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 0x8e269806803440907ebb57bacf1a1048133b817f475ea8754993053233d6c5ef. 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/QZHN92584797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8daf01bcc794c2fb99f1bff260824d8711997e4ce5089012ec01c39f39babc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:28:44Z), 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/QZHNA2537970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94a8e2fc5bfedf32cf9dcc6435c1909ddb415a5d1d021c9405a6e5dad5f64b4. 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/QZHNA2540461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd6e60b787b0ce97cdc4ca922209e79b53c8d545be07cc17d35e6df4c03654. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHNA2537966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fdb4090d168280f1b68f1537229d35f4e31edf5d6c88b5d5c9055f7216b828. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHN92579677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427e5bcc6353605abfcf5e78fb6c97760dde98c03fa2eac41bb18003b46eb8f7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN92579680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6344bb2aae570ec638b3ae4bf9812571b57f33960842b9e893e7c147a53e5a8c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:07:44Z), 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/QZHNA2540308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ddf9bdd5a4542ad37a41452a8fa6a0c947bdb0e46cb4cb820a6418c6444b76. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:03:06Z), 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/QZHNA2540463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4406cea919d4d0632e43877270e03801d0edc5d21f9331354d3a0a80643787c. 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/QZHNA2540459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb0b304da1c36c3c956fb79eb549f9854c6446230b4e2793726db1db33d522c. 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/QZHNA2537985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf020219d0ddfffa71989236eff349f7a2a74014b561f5a56479944ad516999. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:07:55Z), 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/QZHNA2537984.