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 0x07222538827bad309bf9bfed22517c131d7c6a8f740fc1eae6c09f68df96f94a. 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/43c29e5f-33bb-4508-ae4b-e0ecbf9aaebd.json and https://artists.proofprofile.net/proofs/artist/43c29e5f-33bb-4508-ae4b-e0ecbf9aaebd.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 0xa0c485283bf215d623ae3f78fbe55bd30ff3f38ef6476ed555c4e360c7fc25fb. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/GBKPL0819502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1960f24d89f26d0f6ba528a854f5a80589b50ff8b32f81f157c624a2c6bcc5ed. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBKPL1253511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa97eaafa4e15f1f9cac62fda11a485aa390b90b7de77dcd2c5772abd895c11. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKPL1253512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3710bfce9d001790c9e839b4dcf9e21129133dcf514edae11cf1bd16c639338d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBKPL1253515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768c1bfe97fad8fb5654781342dde453d7db9fd08c48011bfbeaba455b65aea1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBKPL1253517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846507b279eebaf5714166b3841ea4f77da617cb20d2954b3faae45193a5bdca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKPL1253518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6d7f49be11408ee9fde85a941269296581dcf02b06ab8b4a027509cdc9b997. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKMTG2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66388f44e9090d29a18c6ce3a71c32f7b75d077bc43f739150fd2305e03a1d72. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKMTG2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd970c6000f057b040bc513f91e29f261abc9ecaa8ce95f2696386aa7c9b09d0d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKMTG2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac3a5251d6f9045d7bd3f71e9c095ef41b658b180e1506eeeb52e28f4a9874a. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/UKMTG2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ebf7309bbf2f7bad2ff776c3b3200d2ff39af0bd7bcf4a25c144f46d9c217c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/UKMTG2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6d7f49be11408ee9fde85a941269296581dcf02b06ab8b4a027509cdc9b997. 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/UKMTG2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc706af2625b06760d02400bb1e1f098e90ee5db2f1b61d4a1ec0ae0db6838dca. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UKMTG2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed011a2526b40a0f84833f293f47cfd187e5a54dc9ff0f7630148bb7a71e3c3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/UKMTG2400057.