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 0x163a1d0bc8b950086a93a6eb8c69020449ef97b88ae210e179be57285b28d7b8. 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/7699da6c-5761-4470-aaa2-132d3305ac13.json and https://artists.proofprofile.net/proofs/artist/7699da6c-5761-4470-aaa2-132d3305ac13.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 0x66ba9c78f1a5b55fc8839a398836a92ffb3dcecb50ae3ef1d5c72d03d7690ad4. 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/NLS762300525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9483e9163234cfab01f3c8aa069fee67bbae32f392f49cff60e179d3ad524b4a. 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/NLC201800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230ece3075510f6ffc2fd1912eb80fb9d724d3bf5a80e1ccd83398fb51b19ee6. 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/NLC201800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890243ee166b0b966b5ff3179074d6f8556500893ab205453c954450ec28203a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLC201800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ea3eed3a30dbdfdb59099b53bb4721d5fa2d1c70f12f6538efda60a920ee38. 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/NLC201700138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1308c22667be3a2aec643bc89b8416e1f2bd315a4d7287d42ab49c12fb357675. 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/GBKQU1576730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88811ecc76cc164dd91fc4255507cc814a8136891c134c6b7f46281763012a7. 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/NLC201400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87774e672300bda27fc8e392c8fce1f485df370d23d7d12aee4463715e81c881. 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/NLC201400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d6268002ef182baa30f14f16df1d341adf7e3eec671342ec4d98418e798c8. 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/NLC201300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd334031dd3492bd3234d7d71ca0ec8b057da0ff78cd0927d30441fc573d8fe. 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/NLC201300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca8eae6af24d053329580317a64dc9f5cb6a00b1a89050ff319ee36d6519794. 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/NLC201300091.
The Bright Side (Hurricane Outdoor Anthem 2013)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e983bdfbfd771c04b0a50684502260c7da945f413cd9af8d1876a6abfc4046. 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/NLC201300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba0b836967742457bceee7a57d3cc33356749ac619ab93982127ab6c14c50b6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLC201200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1009f2f65e8f2cbcdff5ac189fd80eb8cd4156cec17b166a939ed7fca641b7. 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/NLC201200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1475ce2f2ea28631581c3b1dc60d3f584f9b1319f321f301a72fb41dd1e47f. 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/NLC201200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9aa43ec61d6ecd9e84d7ae847d6afe4771efda6aec50263415ec0926c4f4a1. 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/NLC201200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2472b71a01c951c389fa3ea41b58ac8d76ec8dfce312946d3c28dbefd0f471d4. 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/BEB681100384.