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 0x336414a8ec235a6378188c8df80ec4dbec389d87742643b37ca200e11a269446. 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/9623c90f-5b31-4db0-8e78-a50eab014949.json and https://artists.proofprofile.net/proofs/artist/9623c90f-5b31-4db0-8e78-a50eab014949.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 0x0ee7399050c7482f7da855a5db1e76ec38c8d50ff98cc0dc76bb4c48faf2b845. 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/GBLLT1908469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931712bfd80cb15e9060014a6538e9846665be9860bf7b43725c14bf21b5bf0a. 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/GBLLT1908470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1015fd3d864a77c48660a4d6c73a7e2554e6c96ba11a446acfc615876aa711. 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/GBLLT1908471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe185bbb4984cdd8866cd8b3934447a2c2dbcce3cfc28312e1294f191f1cdcd. 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/GBLLT1908472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e956782dba4309b1700e5409051f8d06cecc02b985f0aa220e3528dffc3466. 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/GBLLT1908473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd16df3f60ae7b332b7ac27e186c16bd70ccce23b64ce82cff430fc70882c19b. 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/GBLLT1908475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c4deefa882d464c0b55afa30e9965ad872c1350d72212cef70df78ee1c4324. 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/GBLLT1908476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938753c7ce26b8e538a188ddc4ec2ae2b90934a1fc36f483f4df86871076a96f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBLLT1908477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74af6058763c10766b5954707f24d79282be1b01ecbfd7e89eaaa5be70d35dbb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBLLT1908478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0470e502f614dd3c0379f2ab783f78245910993bb6346bd5c941bd45be457695. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBLLT1908479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7a6b7476ac1bd0396788a465b825abff513f3895175e9ade701ae7b7d6a3a5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBLLT1908480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d194aa5eaef8f298e9c9b776ae5847cc86f71db47261c41291e80e0fbdf32e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBLLT1908481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c50487659b6f67a65485ef7fded871acbdcac86adf3b0a51c8ac3d1cc4759f3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLLT1908482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b785297f9444173ded38c85c4bc12a831501a52d7127a64dd1084cef7b1c5d2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBLLT1908483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015ff5da673829a0b5dbeb94f9dd969ca79ab5bd2fcf6a1097c638562aec1753. 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/GBLLT1908485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bc1a9c0fa91a6243c305ec7953e65de561ce7160a17eb7e4cd26558f9dec21. 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/GBLLT1908486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e345f03c9394128f14ce57d2a4dc4b4a17e8872ad07300e90edc9940952b969. 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/INA2W2302706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68abeef6559070def88c098a7889a74e56d77231fba3a15c3b7b4dca2a4a7267. 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/FR59R2043336.