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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a8f2f8aafc00d69445553f3f56321217f09e1254463c2fae5ccd3e1592250f. 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/54604348-a7df-4eb9-87c0-9b419421f5ad.json and https://artists.proofprofile.net/proofs/artist/54604348-a7df-4eb9-87c0-9b419421f5ad.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74acadd76c6e25a849f1d17f8eb0cb875e8d71779b1bdd05523c657fec84873f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZWDE2462472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd9b4e2c11d790d2aff6820493a2758e532c528c56ffc35653e711fd48be11c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZWDE2462509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb357cb40ce6ea0679936e9e42f435c0a1ec514e46ebdf6c9c6812535d14624f5. 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/QZWDE2462542.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328ad994265ba1d2f8144caa6506dea62141832f2f3a0d0a60645c35b94ea3ff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US66W2300616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912dea9cdaf8785946a90f9ad120a9ea153abc392b9857b46cdda398b767aca5. 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/US66W2201016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcf752fe7d9ca1494846915c96e127769cae7b9450554e9cd1d73dc9c3977a1. 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/US66W2201014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea11f8fbff48e36b03804eaaa4ee9f4c4e4948a4ff69090db6ba692539d3d992. 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/US66W2200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd87e39df802b8bc33858f4a15b4aeb66d656e0a376093f26d2c49e087f66e4. 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/US66W2200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5465c74302843e8f5d343b055c636c38b81d7de4370dc87f34579ce74436e6fe. 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/US66W2101351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa014addbb0a7028b4b8c113d33fef31bd48857bd9d7ff10cdb8bdeadb91ef13e. 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/US66W2101199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cb59806f7a820c1d52f0ea54664388fbc610abde4bbe03d9e1c3baf7f24dac. 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/US66W2101200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbc7dbe51b381650cd6fb10777b0a71865c0a0782bd7daddcf2c497e42bf1c7. 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/US66W2101201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe24c20ab470159ff56c0f3f4da78a9140ef8ae377f351f3f74e6d3683916f7. 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/US66W2101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda4d1dff6d197ec2c25e4ccd75a44c0b548e7f268fc5cbbf66db522c5a04d19. 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/US66W2101203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe1f84a9d1421e09c86a1b5dea718c88fe0c0e2ab9077bcb63675f689e81f1a. 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/US66W2101204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ab866ec66524ec4597c63b86f07c51a28211f4ac1382304e52e76f9804bbe1. 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/US66W2100843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e88ab3368369d864aebdd3e62b9835019d3eecde92667ce1b97740e508c6ec1. 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/US66W2100845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac75f8dc20e52e4afb13b9de25a48821802e089db74cca743f79af379f64c56f. 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/US66W2100485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e50ed6c1526cee533d8127b55c5320ad248d616f9edd62cb7af586b5ed83f7. 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/US66W2100486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995f45f3839141ee6e0cb9fb8705f9eaa13fdf49005c983793872881ed29c372. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/US66W2100487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9800fc3c31ce501c8073faec40aa9c598bc0c9b59131ce3c83641b10718b3b00. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/US66W2100488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8243129d99c1e0a57341b6a4d266050b52a592991afe1f128fe11b1c2e848d. 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/US66W2100489.