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 0xf0d9731a8789f18c3cb68c8ceea1573be9e8d0f7b5509c3b2154dfc9f0f9dcd2. 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/a1684ace-66e0-40a3-a99b-81e2050a6306.json and https://artists.proofprofile.net/proofs/artist/a1684ace-66e0-40a3-a99b-81e2050a6306.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 0x0aafedac7a3ea117f04b14887ac8fdc63396b5c3c5ecdee021f0b9f4a406c907. 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/TCAGM2216172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0d25c64ef5ae1e6175c3a6e84cec20b56a99d5237b7fe5eeae119c1c35d0d6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:26:32Z), 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/TCAGM2236476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872ae00f3f09da4a5099ee4a545d267319a074336cc6efb8b1f0c3b924ff78e9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAGN2248480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35806f0b1287c825def3abf793715aacf6ef31b62d5ecae11eaf48bac0377274. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHG2391991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84c2fb1773e46c293e8513d16f1f0f1ad9f4aef42778ced9f82c8af76c3c9bd. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:34:49Z), 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/TCAHL2381785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349269f2e6f26652d653df7c555151e2b3fe28b09eddc95bd9846dd61f1590a0. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAHR2314412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1f7cc2bf1cbeb005587168793db2d25a50e2f93d26a7a78199af540ee28be7. 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/TCAHW2435249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28274017d371006b2a55dda61a8ea62b40531a6c421d072babd1ed3fb4c887cb. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCAHW2435253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d68711fbbc0f9a37fc92663a487a8bb5bfe7cf5294acacae2b183e6e9fdbe9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:31:11Z), 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/TCAHW2435258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd729ec6b980ce283f31f9e1e679a87cb95f18a66d14abfd20132265242ac0e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:36Z), 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/TCAHW2435260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc512d376d9a75b40bc93be6f09db9fe8a4a35e0dfc105a515ce14fa635a4a03d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIB2484389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30263fc9c1dca95c73a5b83bb578530f759d459ef05249b448a9ce2372a4a744. 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/TCAIC2426929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ad7ac449719e0a8d45e59ed7842b1b3a79153c2f76a846890e12002d040929. 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/TCAIL2488278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820cd0b396142482defc46e240131f094afba1e3682b1f8bef80c3253bb9f156. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:03:38Z), 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/TCAIZ2427275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21ec2a069c8468736a722268e176f1e0657589fb1460f80df6ae715075b0b0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJS2571924.