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 0xd21ed214ce112e0f21d041a3034a601cc19048e260b70d3f797de2bb0336305d. 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/acc638c9-6886-4377-bdc0-5d695b02b29b.json and https://artists.proofprofile.net/proofs/artist/acc638c9-6886-4377-bdc0-5d695b02b29b.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 0x1e5b172f5f37eda1b26ec4a281afbd2be5247dea4005bf759c0258bc792ea496. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWCW51921401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a5d30ab948478b1aad217fab99e2f07ba15775edcbc9522c8d4eb6d04caee1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TWCW52092001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cea04b268e03bb578aac23886d2cabf9a31ca95c78d8778493c89600dfc1806. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TWCW52101701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0682bf8360c494ceddbc0aa4e8f87d71e236c608fa1d81a3c6514224f9bbda. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TWA450593702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafad0d0d270758fafd24595d2b91c16daba0053517fc652585ea9c5e7995d2b. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/TWA450693701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3958e8212fae9fcc0a49dafeeca73181db57b7779033b2ebe605a875ecc1a908. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TWCW52104121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491bc677c1d73b0c98c1b1b1a77cecd666423aa784ca10e5afc303169a540b39. 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/TWCW52104125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc30b8991524b2ab6580dba8809cfac888c05e5d17cc497e9919db6e613c1ab. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TWCW52104126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553a29fd8b3019088905b50f809e44b84f33bb52767f39ee4fd25bcacd3a3ef5. 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/TWCW52104127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06291c5c84e41331deacbf8c6ef282a293545eb6d8a5fa6d0a1234fae0a7cb9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWCW52303071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d423902d255a5c7550b9a379261f814590be37b2e2838d0d62255dfca685007. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWB510859109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe949b8a26e06dbb06081f83e6ce8ad0efa09f82f4f75fa3412fae139bc996367. 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/HKH612100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe949b8a26e06dbb06081f83e6ce8ad0efa09f82f4f75fa3412fae139bc996367. 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/HKH612100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60959406538e7637993058ecbaef901c430efd70f30181495ad2536e602c71b9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWK231508307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa063b48822acc8a5a07487771805d8b904f36cf6d11a30937acefdb12380442e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWI451900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3bf93a13884ddf79d4b1792124d95c55392a4b5a95afe90f9264e62ebd0be8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWCC32416676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e34a15fbfaa6707bcaa636e2b9622d8b0fe321edaf44f11c3165400ab4f7c4b. 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/TWB731710004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbe7461570d2b865cb46c378acefd343f8e4e02503e0107cfb05586bfc13b54. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TWB731710014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea5d3313e731bbc23d87a7c9f11fb3191553627ced70b60369462d55e28704d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWA452211206.