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 0xa09a9c3c662e130d77422ff1eb08043cad62be370dc381a7ce788b3aacf17d23. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd449879-53a1-44a5-8db1-60e201f1bb14.json and https://artists.proofprofile.net/proofs/artist/bd449879-53a1-44a5-8db1-60e201f1bb14.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 0x6ac4c4cf692591f77dd6ca4953a77226183376ce21139ecaf38f740a9dae5834. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FITCR1200045.
20 Suosikkia / Iskelmäsuosikit / Hento kuiskaus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4740a36d4a31374286972379ad21c0a402e6955900ff58ed7cbea275850a5de0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FIWMA1000734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5fe8cc23410fb4d74cd7b3d17f5f9ce594ff6910442bb6ed91daeeb9d3191a. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/FI3HM0900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3fe51cfb638866670ce2de7ebba58541b55aadf2f8a5ac77366204dfa9fea6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FIURA9500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb15c7ff221a3d95877644f380d4a22436a2713b2bd2c581dfe6213e30e9afef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIWMA0200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7549de32167fe7e86b11fdeabb8124c558c9c7697e43a544a7eb451002a4102b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIWMA0400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad502cb7f39d4b3eb4034d9882030b54eb8375a1d278ea05124c3509a9c41dc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FI3HM0600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa13aaa4e4d2a2235a36ed55905667aa9411ea331c30ab1e1af1c4dc9d8c46e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FI3HM0700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4930666f0fbb98204c0b88d965f3176a7822d9c3917fc424508b2ce886213ffb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FI3HM0600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec4c3e3b80946738fc30eb8a1b135c2af169996f61040324ea5e6c4a8cc7cd5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FI3AG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd977bb6e659cd70c26967b395ea84d49361e434709b46e7d230598cd18fe999a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FI3AG2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1091b10d1a240508f48885553c14790aae6eda76450f0d2e5bc2faad247ed73. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FI3AG2200001.