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 0x2d90418bb37d642ad6b41076acc9dcd8e333f9831dc928c4707bac64a0a4cbcf. 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/8d122d74-8afb-46d6-a8e2-5b66bc14ae3e.json and https://artists.proofprofile.net/proofs/artist/8d122d74-8afb-46d6-a8e2-5b66bc14ae3e.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 0xa07692a99c9cd8f7890df9d1e457e6cf95df9e00fdfd35597e3e49df95a5c1a4. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZ4JJ1724550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370ce86e7dd7cd7a2c42899c825ae8e05e4e9604d64b79e82acb8bffc94bff9d. 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/QZK6N2251464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf5f2d6c4bc99d2443e140f531e546fd6a3970bd9341049e3e4f647c85187d8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMER2204633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f81de1643025b00e1455e9ba9cbbfba7e7ddbc397cf76ed2f697ab0c9fc8a2. 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/QZMER2204636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561dd53b57c5738208babdcbbe5aab0b11058cb6e0e84e23b27111b6a0264465. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBMJG2332087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65af0bfbc99406a5c271549ef54ab0e0d019b067f6a65a955b2b8c752387c6a9. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GBMJG2332088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1800377462899067c56041be2f3e889116ffebaf4f81c870953d670c2462491. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBMJG2332089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64eb41ea23b01ddb23620c908de8cfd7a3f90fed0b7dcf3d0a8802083008b81. 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/GBMJG2332090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb488be2b59b57c5d291fedecf00e73db68b1006a35cb180ab6777452721a642f. 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/QZHN42402087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ddbf10ac47b629398be8746c6c2ca7391423c23b48a55221a4e5115db077c3. 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/QZHN42402088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94dfd33e1bf2f15e1326c5effb3f23e9ada86aa1150c909f0f3344b70ffef9e. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZHN42402090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dc6e40aa9ec8e7da8e69d24a38ce1713ed994aed11b19b933bc45cee74eeca. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZNWU2468076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c879099e74e2fc109d9fcbcdcbb4d82b5dca0270c78a1e0fc6259b04b7bba3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWFM2494604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3148262b4aa5637580ed9983c4d1fea9a6e376f6f4a9fe3f4a1f5a45787b4f. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZ5FN2009700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ebf6d0c7980555d3bc4268925195d0bf7541f276b82ec5433dd3dfea6f9854. 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/DEG932300829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda28528489155de36c465ac0f8237d84aa0886e85be422fc34bab853847b08e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEG932300830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a63378eb9d96e9ddbd70c5e4a52c2bd70b1d50c7ce246c88b79b300a7d7c801. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEG932300675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcfa88426b9e58c2dc7b888390f5b926b8afbe90621105d31afb5c6160a740c. 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/GBEXH2500059.