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 0x02111c8d1299e77f492f4780f513be55a2e36578bd2c6518261ad6dba8e3adf0. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd0e7bef-f875-48b8-8ccb-6153e944fab2.json and https://artists.proofprofile.net/proofs/artist/dd0e7bef-f875-48b8-8ccb-6153e944fab2.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 0x28739ca78e14b2b0deae572cf12fe6681d19294c7b48320b7f39ff3a884ca090. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR59R1889136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9a9f8c1f22cad429628e07e73eb43104286d6c659ad857a6a4737918695b78. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R1889137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154ae0321172496413f11e2ad450f56b1bffee77f3c7ce9040e85d0c1275081a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR10S1864133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cf001a647e8b96d73ede448a09477a3ea78220462fd6c04eba036b4f5954e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:08:00Z), 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/FRPHM1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ff369183470e22ef4590634dd44991ef75fdde89ebfccc7a43ff1425a15422. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USDY41653336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cacc40eda1137747c22800cfa30054311bd94763c2283eaecdcf9ac8b26e165. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYZ1912050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3204ff096bed790aebdb6c68820e10d86da5c0ac0650b911e888eeabaa13f6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USYBL1900358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d99e01b45d378659876329b7ea4089d9ec2f8bc0c127fc3fa7c56b01523d76. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P1822432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28739ca78e14b2b0deae572cf12fe6681d19294c7b48320b7f39ff3a884ca090. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R1889136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f2f223dd8dac3c355401be621a60a3419e5c106155676d29d8b58cf5aa1950. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEVF11700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdfbc3314061d60db85e194e89706d01aeabb4c4b732defd94366d333542676. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMEZE1883358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1387b681aacab5c387df1257a61ea87c99bb89f7d873c819b0f0ae591047f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEVF11900559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032eb9551c731501359a6b6c65085e386acbd2dfd588e5a7653b0d107804db5d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBCFB1700502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79c528598b4ac6ebeb93e72bca46b68db60e20d74d9bc98d33981abf38e4400. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEVF11700137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a378a23924acad99e7071fb32d85f54c27031827b88a0ae28210585b525ae9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYW1998934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2695d6514018f86a3bbb68b5fa19c124af85652c15d16578895acb5bd223c78d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUFYI1600902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714227fc854f4fe5f46dc09e168c0900561034dd2e7f8f7844d0496353e3910e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEQ121424599.