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 0xd4c4d270e8567b81761e47a2b08b94147cdd03938b3fe466d773f295fd5c450f. 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/77452a12-67dc-4920-b827-878796cb39a5.json and https://artists.proofprofile.net/proofs/artist/77452a12-67dc-4920-b827-878796cb39a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Twinkle twinkle little star (Canto popolare)
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 0xaa83807fc6701c15f83bccf128a2d08f52d02a3012e0aeb2f8aa29216d95c08d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USHM21181191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89904a72b0177c9ceaa0d15d68dd68a72153c47d732d32f1046e7da0bb59952. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM21181193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4328f14bcbf46c7dac67a7f072763cd0daed4580858cb8d2948a0daf905139a9. 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/USHM21181194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e9ae98ad0e64e9f4598f274125fb73f85862b5fc80d13616224a97376fe9e5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM21181196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96a8802cf989076fc66957bd57b98c24a88e21fd7568870475f33a1896bda0a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM21181197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb51e7f7384c84b23fbf0d3a582042ff8c4f7dd40118cf2ad18a5b3b5038bbe4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:26:48Z), 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/USHM21181198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d1a02c989e058416116f5a08898103266a0298a4921dac64bf8fadae8d26ad. 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/USHM21181199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2a4e1fc1e8d0ede9191f32fb764bf35b69e3bb4e545afa7a5e0c5e91e5e19f. 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/USHM21181200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2a14691b3d35d5db19c5b673953c4b4d43866d4b94b39a5446491c8bca8f41. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:52:26Z), 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/USHM21181201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b17b5cfb460a42147b7033d21f4e868b6d3452576490310c5368795b279268. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USHM21181203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0dd0701c89e066d0410626cfb7e8c7956f4d6d2dd95a8ee78eb0cdb68edb65. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM21181204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac761ea86e91858f969db56a825961efbacd2ce61360b73587bc0f78a03b4ed. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM21181205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64f00073065ddfa461f7326497038adeee62f0ab6a1c1409dbdc1ce219d80ad. 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/USHM21181206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1361feb7b171d8ee41e287fe27c8a095997ce75525722610a7479f9a1999d0c3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM21181207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd40142a05997be1dd06d8d141e8e6924c6d393c79d4f1837967c2019a7b05b4. 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/USHM21181208.
L'albero di Natale, una ninna nanna - O Tannenbaum, a Christmas lullaby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c40af5b317efcaf32f967c0e13590690f072e717e36acaa7c472e614f270e29. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USCGJ1210102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3ccafeae8b9b299424fc4f3e1dee9693dbd31a7c84099b00c951504fcf1419. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:03:11Z), 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/USCGJ1210105.
Johannes Brahms's Lullaby (Wiegenlied - Op. 54 N.9)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4b3ec5cb1a7b4c98ee44644d6f890cbe440799ec49343ac875ba9229f5f6a2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ1210111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd0e4edac39aa4150ae3f9e32fabf147c3315c7aa380159846e595839b1fcdf. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGH2235323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a4f7b0534dd4965d3f90ffe4d4473c7d70478aaaeb18f8feadab1dad886be0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USCGH2235329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10592d239a547c584f1ec2fea3f96044b9ab3f89dc5da8aef057ca74af25eeb7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USCGH2235332.
Ninna nanna ucraina: Il sogno passa davanti alla finestra