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 0x0756d388c99238ae8128025dadb8118625452a04ac5856d2194d53b30b05d166. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db133dc9-57f2-4fb5-b224-0295c7a69151.json and https://artists.proofprofile.net/proofs/artist/db133dc9-57f2-4fb5-b224-0295c7a69151.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 0x97447305f5a4b21ea7a8d10b2692d3779207d034dc26b95df4c70024bb77314e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZXLZ2507982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1b2ace4daa0e2dffea7522317124e649bac8310fd6cf8543b4ea75d3adf32a. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZXLZ2510995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4421e30612527309eaaf1388253bfd2c2a100e43f7fc42fe8275098e0ff26e6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ESA012580911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d469f1dd569ad73c4ea0f075ee92b6fd0d7d8fb47169365b649abd2eb66307. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA012580912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6efeb9586f4a5fe7a42d252ce168bf3a0acc5effffccf48ed35cd18eddeb59. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA012580913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a6c16a4d2e29c2143f22f61f667c8d3c0f7a0722fb4a245c05b99269f06c40. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:56:10Z), 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/ESA012580914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf12e18f9a2b69e6a551b2f990b1243dcafe2e21efc11cff252f300175e8222. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:36:43Z), 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/ESA012580915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f8fa6ef40d33170126d05288cd07ff6a9c42ab3ba30bfd71a9a6cdf4efef7a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:44Z), 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/ESA012580916.