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 0xba3b222f3288aabef9e0891002be55bd82c16afd1105cbd32593ae6e32b7f3ae. 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/26080883-0177-443d-95c9-a373051395c7.json and https://artists.proofprofile.net/proofs/artist/26080883-0177-443d-95c9-a373051395c7.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 0x1053d91ed5ce1df27a6721631521cb209e70065d1175031facd1ad60d1d3e036. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:27Z), 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/GBNRN1790195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87940b4503c1aeb30cfb3308fa53b5de968a0022c5b632c2f9e4501f9a9504bd. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/GBNRN0810713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e091ed2fc99b6c80d227121a4db61e5cffd572231a6bee3ff400b578dd56d23. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBNRN1790196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a64c27f980c324dac9283a2eae8dd1679ad778d6fa846f5eea05dfdabd16c29. 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/GBNRN0810701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfae336b71d1c0305dcef3e835383639804717452916b48844548b28543cbaf. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:33:16Z), 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/GBNRN0810707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a64c27f980c324dac9283a2eae8dd1679ad778d6fa846f5eea05dfdabd16c29. 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/GBNRN0810701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfae336b71d1c0305dcef3e835383639804717452916b48844548b28543cbaf. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GBNRN0810707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f01680dadcf2bae10b60795efdb8ed2a265ef8b23f1235503532169fa535c7f. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/FR3GQ1800360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0e79bdc1fbdc060cb215a2bb49f15f968702904b1471d5239819919457daa0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR3GQ1800420.