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 0x13ad1a53fbfd71261f652fb3d196497eed237dcfd0aed071caeab8a5ca2855c6. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f6925a9-6f19-4652-a9af-e691ef373db3.json and https://artists.proofprofile.net/proofs/artist/9f6925a9-6f19-4652-a9af-e691ef373db3.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 0x869d00d664ce2fd6a244229d899c9279a50377ec1b5b0d54b9b5a2532c922c6e. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/FRX762078494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7156375a382a34e5f9adb8302f13902939efc5aa9949553217c8f06ef3cbdc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FRX762078495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2077213caf9674874372ea95be29eb7266a176f164f6d1d08e3f0679cc6dc67d. 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/FRX762078496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32575a26ef84a1b4f74a8085aa5318f65e06094299fbef8a731b206e390adc0c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX762078497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9ee5a2a16af9dd7a7c0b73ecc0be307840768c255506863f5985543bb742fc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX762078498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85f1e26cc751c16df12398c285b4bb94e4460b0eca76d7bdab13a799e7f94c. 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/FRX762078499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ea9ccd64baabffad8b88e08e6a801d14a02e5be5d66b9dcb732207b396c5b4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX762078500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce40f3c21bcb24f5d8b319faa7a5d063df6f23719473372e9f9099701c7c384b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX762078501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3c33344b4c82bcc16e4a8900966b7dcbe3ee20ef9ea10845ae584209b7fb28. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX762078502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcc64fa4c530ce1ec58d3d81f8aaea3432806c13d2c7c62d9665e18cc7fda20. 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/FRX762078503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452b9e147dda2f40cc035700743e8892c89054141b9207f6919e8fd22cb2773b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FRX762078504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc11a4b05018d7cef96d311a63a0bf2532569ba2c19a18b8fc68a2805e8fa99. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRX762078505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae83c28c11361e178fad913d00aa2feb8dcd1c843e69a12102259618dac065b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX762078506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dca38e202b845d08d5b15db81dc2a983d1200255ebd6c666d758c6fd4a35a70. 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/FRX762078507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28ddb814b2e0c47140ac50e67a8898316112166138ec2828e31ed8d523dc525. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX762078508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5d1683342309452baab61d03f956118cd91bf9e852fe5287aa949995613d8f. 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/FRX762078457.