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 0x02fa070f73674f138250ecff9721975a66f0c0b8458dac6928bb84629a6609e9. 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/5026b457-107a-408b-a6ef-c51d4490fbd2.json and https://artists.proofprofile.net/proofs/artist/5026b457-107a-408b-a6ef-c51d4490fbd2.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 0x817099f143b534c8b56af9cb7c20020515dcd4474ae67ee8f00f6ab70995d125. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRX201975568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33a6700ca21288cdf7c8713d0b68bafa8ded7121f26f18fd71564ab438fe08f. 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/FRX201975569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7a3636592c33b8d4ca1a09126232d431845c7b6da60f72ccc88018bc366cf9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRX201975570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd247afeaf509a2112a7189f1fbb6280ab171e3fc36ae95b113426586e7c9e7e4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX201975571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ac1d42567c9ae8948240c4cbb1e3312d809d305bb261816492b52749995a83. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX201975573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d218a906e92c24a906dd404394e9d487011fdacd20dfe317083a74ab99ee14. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FRX201975574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3278c698c9c47eebe0d2a035c2439ebef8a8ae1ba334e0c3d5ea1a92a6b975. 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/FRX201975575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931f2eccde7cb49de20edecfa195bd23e121ac69d6d96a4799e457dec155e967. 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/FRX201975576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bdd1f574d77f4e50056e1350cb53434a229ca4a232e246c624b11836f36003. 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/FRX201975577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4559956a370cce4c58de31e00a274126162a1e65f64d195b3df95c16b6994c1b. 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/FRX201975579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e219dcf60b95efe9e46a4960af5aaab19e60befbe4e2ac34cd857d1e9e668ad. 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/FRX201975580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1980fee21cc399371c120a86968379202d9c3ce0f508946a54f0cfbfab2f28f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX201975581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70d6e8b41d1defdfadc465ca42fcb95729a44649af866c0e0742fb35f88b611. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX201975582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113c1b5053feaf3be93c51bb9ed92322ccbddbfce8ff4ee13eb5b152209438a0. 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/FRX201975583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f86b1fe1f67c8b9bb0a936378a280d924de0b266bb9f4b4eab78caa4688b6b3. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/FRX201975584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95acbb2de9548f27e0dd3fc635270910690248cb37943d0a628e4e12f326dfe. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FRX201975585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885a8b9c233f4a71772255cda3d291bfaa7c6f4771bc84ff9e10b9420be1dd58. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRX201975586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1427555304914537778ac655430b3d0eb3cd6c9afac5641b173b044515648b1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX201975587.