thumb|Persiana Jones, 6 April 2007. Persiana Jones is an Italian ska punk band formed in 1988. They have appeared on Italian television numerous times and toured countries like Austria, France, German
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 0xf5f42a46b9695635bcc330a827220bb18899ba251d045b549b4ce07be22d1f13. 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/f5fc8431-0d1a-413b-bc6d-e2445a5d5618.json and https://artists.proofprofile.net/proofs/artist/f5fc8431-0d1a-413b-bc6d-e2445a5d5618.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 0x31fa89fac22524b51f154f99e45b4e9ecd929f40d621b41150d77252f347d5b5. 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/FR6V80702974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142383bfa69034c131bdf5ed23fc96f3bc18351a43f04cc5f9dd6d2530a2a66a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:11:25Z), 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/FR6V80703035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d4334f98d0dbf6b0a1184752ddf8638d09310e8d9ea3517ba2ac2b43341fad. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR6V80703039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba8a8f44fcdefcf2ac568fe9ce0286acfcb5a59ac91b51d12b3f36bcbe59747. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6V80703052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d2ca9788eb57b144c21b91c36aa8d7b3596782dc2bb68938fd08719078c633. 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/FR6V80703053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15121c25b6ef7d30c14b905924f748ca2fcd0bd90c7becf36ced5c479de548ee. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:25:39Z), 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/FR6V80703060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2863e73f7329b5404b49fb0a8df6324611ef5644d4169cfaeee481b9ff3a771. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITL970707002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7aa7f1a35a562f09d05148d9a046cd541866e3243a004673bce1159a69d285. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:21:14Z), 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/ITL970707003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811d4fc88cd37a0e078e65e43cacab223ec4db4df82ec126ef167b382e61de65. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITL970707008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b057323cbc2a27179c72c1b1a26e0a5e140bfe0a687cf2441287e9fc765916e. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/ITL972323003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f111b2c101d53485f389604841bdef185692fb2f31aad44d3401584527c1a8. 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/TCAHX2474433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf603746d88dc7416f247009a5c98d2389961d2b4a3250b43f0fe8bfc2bf262b7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITG370300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9385f15a0242264c9227644be4594623ee95b5753dfcc2afd9b88ecf222c95a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:51:36Z), 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/ITG370300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0e784c965edabdfbe0a96afabda55af1b4099a5e7cd01ffd1a2e38093c218f. 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/ITG370300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c3c0288436cfb1efb64b2f758c5ecd2c8fda5ed83d25ec5bf9998a8cb8142c. 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/ITG370300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3995251380eb1b056d6409adc2f03070de61d8b6595432b2dd8e06d1694ecffa. 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/ITG370300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac8d2b807d70b52b611761b32affc55f1ebceadfeee8b2537626c4510082462. 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/ITG370300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac3b568528178ee27d4333928134754eb9b1abf569d2ec37b099f29f411c7ee. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:30Z), 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/ITG370300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b306d17060ae12925894018f6f086b4ba0a1712c17afdf0f5ecf0a0a034aa2. 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/ITG370300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc727f8c3618b35cdc2cbb507a39213896d0cc955fd032b22cd7549f634f9b4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITG370300020.
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 0x10df67e5eba87ff3cd35bfae3c2873f34b6170775b8e6996d98b47c4689df147. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ITG370300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5ec8c87d9fa2a9d7db73aafafc3e49d42b03cf336de8b528f76e5c9d8f9f5b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ITG370300022.