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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257a5642393445a21079c104ad6f04b49bec2b90117d7431ff5a568919d01a7e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/269ba615-2e72-43ed-8654-c01c6cbb75e4.json and https://artists.proofprofile.net/proofs/artist/269ba615-2e72-43ed-8654-c01c6cbb75e4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433a7b13cc7abdfe5bfdb2f86e0bdf2d95042c617ce1eb0eee4305d550fabee2. 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/GBLFP2480332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351442c541871e187730762eda1ad15a491a1f06d85c4f2130691331ba3842a9. 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/GBLFP2480333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf512e3e5ca9eed5cc61195189afa35992c371d4931f140b7ac9c40a194d6e9ff. 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/GBLFP2480334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9454ae1cca502ffb5e156b66b54554f1e5be9f299f732641074d8a8c5340e0. 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/GBLFP2480335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584cacc9bf5a24fa19a3ad27ae9bcad19b59e0b6e3ad5419c3ff9e20e3d852f6. 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/GBLFP2480336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d57e4165d995b4c52efef2854b48d3f2170845c230573f2cb1c2b7f9c3f92e. 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/GBLFP2480337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a91fe5f2de5cb50016d6ca270016060347461bed9db87fd268e563e8915f8e. 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/GBLFP2480338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9efe7a5cd7ccb936857ca58d4a648debbedc139d6f426f6ff51394736ec675c. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/GBLFP2480340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3d417930a95863e92b524d2555d53ca952beebe6da18fb1ff2b3e20f7adbc2. 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/GBLFP2480346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaca0f1561399db6ac217ef7c16af6c60ee975cfe80dce0106027ee8fb29309. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:32:09Z), 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/GBLFP2480339.
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 0xc9e3fd16644803caf6c260ec262ed3c7c4f28cc92b3f0a396e007d70c26cc646. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBLFP2480331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bbd8b0b494e6b4081efdabc946c46653bb945984eac8d06f31ea4c998cf7bb. 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/GBLFP2480341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b9605fc84a2c262611cbcfdd3ffcb9d7d0f9066a77e567f25966a9e58e67e0. 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/GBLFP2480342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc50b4a087794fc89a10b3ce5e8f8d224528a384fbf91658e9eeae409cfe6b62. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/GBLFP2480343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f90d38e38bfff75abf56549d6851357c17fc5eca4d8b6a19b1f91144512cd94. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBLFP2480344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdc6bef84abf81e62300508a0ee4a0d21378d3ca0e77bd41f6335aad0c8b489. 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/GBLFP2480345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9525aef5303d1ce989433321dd7c80e5aee7c2339a9993c2c8c154e2bd66dda. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/UKXN22579472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcebbad0d030198ca3ebe807b7be5df3cbc28c8e3ddf108a79d864e563fd739c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKXN22579475.