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 0x67cd36613fb4a1825957fda94b38921ec6b2ba6dd054ae67e487c7a8a0e6df70. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a39e324-3654-46bc-9554-30c29d75b57e.json and https://artists.proofprofile.net/proofs/artist/0a39e324-3654-46bc-9554-30c29d75b57e.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 0xfc360ca42814197b6034e790644fdca02f49fef36d37765aa55d08f7d7b059e8. 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/ARV7X2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdebb82c5a9e0b13c5ea056f8ba000404e842913e5078f8fee70411c9b85d380. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARV7X2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8347ef432c4032fb3d907455eada3ea5906ebc90e71cea2049461dd2a58d89. 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/ARV7X2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d1aaa4431c29f3ac13fe24ce6833f2ffc61feb115f183a089411c86c071b16. 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/ARV7X2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b8d782843cd6193a8e5add93efd346da9e0e7c495d2a7794f740421b80a0ba. 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/ARV7X2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc360ca42814197b6034e790644fdca02f49fef36d37765aa55d08f7d7b059e8. 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/ARV7X2000030.
Todos Mis Amigos Lo Dicen: Estudio Bulo (En Vivo)
Balada de la Clase Trabajadora Votando Neoliberalismo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4032ef7b2b7e1789444c7d837f2ada4fd58e15f479779f5109a115389247ef3d. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ARV7X2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cef598d8cfae963057b024cff0d5922106b5c4996d940e371dda3a481d7558. 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/ARJ5T2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2238e79bd66bb38f6cabd0fd7ea3d88a9b1bf36f6d67b7d04552727ea74e2677. 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/ARHSB2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec19109fa12af469bda43be359e72cf399295324ae3295ebcc363f75deb74ae. 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/COA7W2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130439d0501d3588b2d5a700279e624fb21a3fb8a2ac245665a30079d4616d8f. 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/QZNJY2471967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd98ce6b85c0d7cd05df7904ffa1fb090c74322f50808f37267bcd9221e49e5. 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/QZNJZ2486866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89a1e140ddb8233d90fd466a1862664ec8d2c356571d3f58b5de6a8ce0a6e6b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTVM2476847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc811b98d35a65fe5ae7f07999020ca615f4d42a125d149dc4f7d0c870aae786e. 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/QZTVM2476849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbd7a8f83d56a80b3e23dfd0f12a3a28e6b8d796db93cd8bf753382c860961b. 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/QZ5AB1933432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cfbd94d45b821798044bc08c93a02dea639a2b0e66a5d82acbcd4895369fdc. 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/QZ5AB1933434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6190dba230a36eb60ff0805d667783725a7d8e2dd4f32db803edf17f17e085b7. 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/QMDA62392976.