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 0x1be0473eec48f9062975f644956a445e859e4f7feeeb57e83d327d13c86281cf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4430111-a7c7-408d-8743-0bc88a98cbbe.json and https://artists.proofprofile.net/proofs/artist/c4430111-a7c7-408d-8743-0bc88a98cbbe.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 0x058497e01a0f6c9ede3ddd98661c9dfe18354cf8c2acf8be5a2384aa267069ec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NO2DY2100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc4bf9203dd7f97db10a1f45ac106d784fa8e9959a83ca512b5d6478bc9e154. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6HN2084169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a9b38896269d1cac271e90cd34d5bc622c96cd670169c67c8e4753bf5d8616. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5752067076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc4bf9203dd7f97db10a1f45ac106d784fa8e9959a83ca512b5d6478bc9e154. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6HN2084169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dd9ce436d7f070424e78d3867726b3bc9b1c4acd6f78afb0577ceff6974751. 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/SE6HN2078536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ce21845b66147c3fa063a495f3cf1ba42affa0d487ca1651f4df5bb18ce413. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6HN2084129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f3213766549dd9c9bd331c08528295f03e39ffe08d7a4e04a33ad64a77760. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZMEM2492551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe013519f26582da62122f48cb11447961479fabc256e23418109fa9720ae1e0e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOUM72200277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b62f53a855547541476cdd7e61911d36f46c7f9b154e39f65987c394cacffb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOUM72200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f812f30bd0e8704c1ccced79ce4908989e25b302da123fc674464e5a1afb89. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NO2DY2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f30aa136e06952e59498764a01aaa102993f4e5a533528e9f13bbad90b23e1b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOUM72100174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3c458eff0eeeacad0dcf246e070d0496759fc9632d16090e7b631df7315d7b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE6QE2012270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dd9ce436d7f070424e78d3867726b3bc9b1c4acd6f78afb0577ceff6974751. 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/SE6HN2078536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d38c110b6e0da69edebe4df58bd4b5c5d28e34025cc7314749b9b4c70bdda6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6A92021439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eef38f42bc67e85abd164229f8d738804b4be8ab3f59668cec4dead84e1beec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ52074376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98416a9d24cd0bedea10e024e566c56e4aa29b834a41228bb2b4a10d40535726. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6SA2012716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdc1193ac6c948426e4ff2e41fa38ef4e2300993c29974b62147ffd17ac8a04. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZP7F2202233.