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 0xe8b0283ebed76654212dbd345fcbae0c9563345f67d7bb5b5be413a65013ead0. 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/999fb96a-e345-49b9-afb7-86dfe6c3da44.json and https://artists.proofprofile.net/proofs/artist/999fb96a-e345-49b9-afb7-86dfe6c3da44.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 0x7fce9dce2649bb20fca685281aadb06260f46642375cda32b88e172afbdae111. 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/TCAGN2246725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ed3b9d0d94fb711610db69f4767c2b28f8f2e1df4b7314b3823158b79f3c6e. 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/TCAGA2297933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bdb0494fa03b23336f512fe16ba8f5558eb44c97724dcd30e3a2b1ca0f05f8. 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/FR96X2187059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae2874ed609777b768eefc0607f68cb2e6b80cdc11a13923d17c852d96b4bd6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUYG1353951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf3a002659e305ba7744e14acc91024bb324f755b5cd5a6b0635ebd386cfadd. 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/FRX282040137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50516bb07593a5439fdabd8028bd483611b0ace701452850af03f27d8c9af16c. 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/FR10S2054403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9552e3aa37ef6193dda188998ebfc99e489302e1ceb98669615f8fde2eb55921. 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/USA2P1943521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed409ad457489e036fac37a69d2344591021c4d99d6e7e09f98e6951ed77795. 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/TCAEF1913200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a56506847bb52a6e84f3e734c62511f4314df18b0c9d277c84bb3a8af0cfb2. 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/GBARL1800951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50281a4ee00dad0921c08b59093901bdd50d3a647f34b644822a0bc45622216. 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/GBARL1800952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb291a57ac702abaa22e9390951066430d5a8e6cfe91965415a97c215e8249c31. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBARL1800953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fd6352693dd2fc7b6f2c3ead9f136b6274d23a437ba744228b24098e5db54f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBARL1800954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82775501366b6858aacd3784d867d66b18d5eb60b09f1a0fc45f199e355835c. 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/GBARL1800713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110f70cd66b3718bb5c915272ed3929b9b26dc70d8591eedf72315149396ec2f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADM1826375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec344c9250712228e895b2a2aff49fad3f4176bdb430ca55bed647f8a30d059. 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/TCADI1751210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bdb0494fa03b23336f512fe16ba8f5558eb44c97724dcd30e3a2b1ca0f05f8. 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/FR96X2187059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf3a002659e305ba7744e14acc91024bb324f755b5cd5a6b0635ebd386cfadd. 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/FRX282040137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9552e3aa37ef6193dda188998ebfc99e489302e1ceb98669615f8fde2eb55921. 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/USA2P1943521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed409ad457489e036fac37a69d2344591021c4d99d6e7e09f98e6951ed77795. 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/TCAEF1913200.