Bandiera Rossa (Italian, 'Red Flag'), often also called Avanti Popolo after its opening words (also to avoid any confusion with Le tre bandiere, another socialist song), is one of the most famous song
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 0x137740461ffb82daa15e7c8256a3e0bef2ef9c7fdf7f74848d85e66afb750fde. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e96a8ea-271d-4b02-83ae-c0dc7cab6818.json and https://artists.proofprofile.net/proofs/artist/2e96a8ea-271d-4b02-83ae-c0dc7cab6818.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alla Rivoluzione Messicana (A la Revolución Mexicana)
Lunga Vita Alla Rivoluzione Cubana (Cantos de la Revolución Cubana)
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 0x79d937662ef2e7999b4a8aebbf3a9bd8bebaa0b8627cc88f1e7e85e0c1761782. 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/DEUE12176176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd184f0db9257aa85d2ef21691d632b2bb60c029c19c34e931ba6f13f02c51fd5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEUE12176177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aea5ce5f7f4019928f4d9c122308a219e510e68a6cf794f19795821ae91662e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEUE12176186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10689031533dde38999b9572be28268a966324238e8e70cfa7156b4e920d17fa. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DEUE12176197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b94355335f99806169e066b1d4fac871f6680484c7b450a233258994ba56da. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/DEVU51811265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f9d30fe532649b43c2c3c19ca5802689767a6235ae0cc88882cd35238ec16e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEVU51811268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89da5612da30c04972847dda5789d5337630530db6797d9de9b442d55217bd0b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:43:23Z), 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/DEVU51811269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56189f72c6788ddf9b61dfcd796341fcbdfcc3bd165c9068f2e35e1cb380415f. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/DEVU51811271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72921d9cce03e7ba8c392dcc27cef3e81607639a3becc3dbdaf74a3de08f0df6. 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/DEVU51811273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3ee990e625a85040771bb4adc5c3482752d77855b978cb16f840553b4a7847. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEVU51811274.
Venceremos: Canti Per Il Cile (Un Canto por Chile)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64b2fc63e123e0fd920253d1c2cdf92e031826268b6c7b38342adf3267fdb77. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEUE12176062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb8d0b8c6c5ae651ef67c578c0fd4b0acaf2f7d7158ff34619e27a7c77f675c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:08Z), 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/DEUE12176063.
Portogallo Non Si Arrende (Canções Revolucionárias Portuguesas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec0b9b8e3e4252f4280696a2c28df9c9bcb146e3536fe76f0c0969b3a732b8b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DEUE12176222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66de56cbc4548d596c20d27321dbe32f71a4d1e8c7190721afe1a6b55f2b173. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DEUE12176139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348f249d69f56dc212b6876fb2eab08af23eb0b80c3ee84a3407907fd0dde425. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEUE12176235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688134129b172215fef57bc0a865999770f7225193884c4d6a79a01a5e9c676a. 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/DEUE12176211.