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 0xc450a81e58224b8c8b9cd92ca5b4f41839d358d8a94d87d00618bc40bcda489e. 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/49803bf6-e6b1-4770-8370-ae0e9f154109.json and https://artists.proofprofile.net/proofs/artist/49803bf6-e6b1-4770-8370-ae0e9f154109.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 0x65d47020c8e528a219e8829d2085ac0f9cd20b6acdb9c98ddf024f812d3cc5d8. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:15Z), 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/GBKPL1415746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54354e8020fb19fe321e464b85e9cf8250ccb776dcfc4c77a551312ef4256c15. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBKPL1415753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9adb63f1d679ad8012c0818f67b483ac8aa8cb1c4f66220b29677cdd27407d9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GBKPL1415759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d301c87bd34e77d42f9079fc332a8b022dbe04faabdb0809af9eb5512b8e326. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:50:10Z), 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/QZXLZ2383857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c57c0f4ade1e25166c6f6706832e5b42d5b914cbd78c166b86b427497055ae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZXLZ2338508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e60c155db1dd4b80a3d2a105f049227e841737c0f24b27be70f573df2549106. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZXLZ2383861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ed68d16500662d5876277d39c2e62358da45602308fafeaa7fbd0c9d0fc94f. 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/QZXLZ2383862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba9353ea92c44fe04a346c2bdd18a2514724d92331cba8228fe7609f0aeeb86. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZXLZ2383863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345d8394e471ad461412a36601a4e216b2ba258957a245448ce23d36bf724b70. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZXLZ2383864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a98c94b98253b6b7af8e5e5e0d54e457141ef42f43fca40954d04e10d28ff21. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZXLZ2383865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd088597b784dd43a2a0bfc49071a29d6012927aa8b85358973f0df444ad24993. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:38Z), 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/QZXLZ2383866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fc230a64e920047bc2856ac062677b1acc48b3b3667fdac27f38102344eca4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZXLZ2383867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde08b04d967e015c0508365edadb49c635eb11f4618c81e9426dc5cee921b3a4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ972327924.
Allerhoogste Heer die alles draagt (Zonnelied)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb22762428adea00ad6d21bfa152b71c8ed65096599d6963937f2526de0bd75. 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/ESA122551800.
Samen (Meer kleur in de kerk) - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709a8a716313f406da0e0c52b3a5d1e0632b24760af2d4edbdb4d4946bb89e89. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ESA122551801.