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 0xe6bc70bd9dc97e5b9730e751ab74a316b74f90d988e4e5e6506e49c727dcd94b. 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/4b7502b2-3208-420f-a0f7-7e670513b91b.json and https://artists.proofprofile.net/proofs/artist/4b7502b2-3208-420f-a0f7-7e670513b91b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Sinfonía de los Bichos Raros (Banda Sonora)
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 0xbb145f46e0132b981ab3a4cda6af0715442c9e5081dc00723ad70502c6e8bf2a. 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/QM4TW2376832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb781d02fd34ddb5f9655ddb8527e81c3c41a0fef136ee500a9f735fe169ca8ab. 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/QM4TW2360997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792cccf76c7169e25399f7810e7990cd306bb448e2d82861f077db22c43ac4cc. 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/QM4TW2360519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7d92a718011bb558d8d8327ae0aafaa11207ab81c8c23a18196d38921c4d27. 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/QM4TW2378425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac217f092947f9c7a593f705875164ca43f33397e314392016ba7e3cfbe74f79. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM4TW2360470.
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 0xaeff31e3471dad5707ec4430c146b4d4d895a4740c28186ca3869dfb98e013e5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM4TW2360752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7ce5dd22e49a9f4ad482e9f01ff493d346f668bdd03a4341f715af9a2aa5ce. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM4TW2361103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1190e288bcb701ad07010d7438bce5cf6ae0ed244643b37119ff666a53aa7630. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US6R21371983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8dd05d99051749ab509f4d9f3d75742757d369d83cb449ee19410fcb1223a8. 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/US7VG1828612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f97a17a32bb4d28e50e0f43e0eee36cf18bb64fcc609a3d7f6453e558b9e0e4. 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/USDXS2204053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4342fdc8c6f4edf4ed2ea6e11c71effcd9bc8d5e8f140075f2ccdc0aef881daf. 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/USWL12501085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906621ada994610fe30e2d8d31df8597f467466bde60265b60c87262b68c0592. 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/USWL12501086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52102db935af12b7956287cc092c4cc06f3520efcfb288355890ccacb33c8ffe. 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/USWL12501088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89209f7a63f7768f8a1e3626bfd4f47c0546262bd6678c46dfb67a61dc6d044. 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/USWL12501089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c470205b9bae1f8f12a4816072b83bb10ac5e1d3a1069fdfca4fe63354fd593. 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/USWL12501090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fff27f69d48592c6ad81c81d6302ff2bd003a8267a10daabf659f6ae4ee3abb. 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/USWL12501091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee9e6a706a983af02e9e9f71a6ef34ebe96a01817bee4125af9141a118cfa95. 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/USWL12501092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6cd9f9eead7bc23cfcaf29dea9d151fd558731d812efd05a5534bb2367c5a6. 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/USWL12501093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65841ef360e36b1ad35c694ef0c2126b4463020cc169561f0bace088750d5dd. 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/USWL12501094.