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 0xf4d4b585b71d2fd8083a96021080e6562c747f196ea6210c842f0222849cb3fa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dedfe371-c1ff-4fcb-9422-cd1246c34388.json and https://artists.proofprofile.net/proofs/artist/dedfe371-c1ff-4fcb-9422-cd1246c34388.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 0xa1650f8d21874b22633258a3463f7dabdd415423ae5e2b4b8b9107e8d0d881b2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/INZ031409044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da3e56a39febeacd1a5686272dea4a779e11998596009ca23eaf8d75eb78895. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHN72136387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ff2adc4b20a61981351542acbe1f61c98d21abe1375faf5f8313bc739394f9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:31:05Z), 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/INO132103257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8005793917a058e82c1b10cc7ef62fab0a10945244f70e6571b46c2cb89468. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:21Z), 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/INO132103259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80fd0235934d6fc0e6e5883101d5d93b5643251f00ec5a126a3148706debbc8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/INO132103260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292db3cde58736e14b9e72ee714e0d3bc599f578719941771a0bdc1f6d4168c8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/INO132103261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b4b0b3875c101df0e5ef2a41f120a86f2ca059c3e4b17ea3078fa37e8205d5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/INO132101560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4324d526817e28458c5415ee1c03081d101a369ff1db2f5bc89c66dfad86af5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:22:55Z), 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/QM4TX2318158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81406f4610835637667aaae1eb9737851f23cd2dce262ccb467a7e8f1d368237. 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/QM4TX2325052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9936aaa140414cfeed4813fb3c63846869a1e023c2a161d5c84ff5c9e5656d0. 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/INUM72500354.