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 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 0xd2f4b39137a2446743d826caa7810fe283a528404557b3faf69b4aee56c01220. 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/7127d2f8-e409-4caf-a272-ab856f76dbfc.json and https://artists.proofprofile.net/proofs/artist/7127d2f8-e409-4caf-a272-ab856f76dbfc.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 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 0x31b92c783e0a37bca1dcba3323a3d8c806ca41d4cb3a59047107e44482f18ee8. Chain 2 (Bitcoin): anchored in block 957536 (2026-07-11T07:16:23Z), 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/USDY41613595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6786bad80ab0781c231ce99837b514ec1cf82256628f323f01445af87b7480. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY41613596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf093a78df96861723c5918c4613c09fbe1e7e6ecfb9deb2d1ee9c52cdd9cfe2c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/USHM91661531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff143a0bc6305be9e30689d305dc34156ad430903dee3f695a8c1347fc588982. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91661533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cb14cbfad4cb73919ce7032e53697baf45d3228250770633d8fd1c9cb4924d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USHM91661534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7506011c36408cb1f4886df1c47fc86b002fabd626d4f1e1e7ca8a4f12b7b426. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USL4Q1756526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde50b276dba8624a235fd11c942db1a5aad3e2b517731d3df56c11069096685f. 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/USL4Q1756528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb431d75ac53270554821ab2d39bd5bdc9473c7937a090db652bcbfc4276a51a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USL4Q1756531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d15315d20156451b0e9d56360cab9c7ae215155a827cf8a61b8ec7e3a69c04. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4Q1756533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6550778de433bb0e711ba3e142019dd68d35e7fc624883ed06b0e4bb2572f30d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91847397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43379d2dceb7a4780afa604499b77f98dfa3fb215bbcbb07e748d039001d84a5. 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/USDY42098133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3327db5c342ef4b8b436730d52fb098d71fc9e3b8bb13913f45553b6d7f1af56. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USHM22019787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9c396991ae69f660b915c1acb74364c5df785071e7808ac9dfcde7740f2ae2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USX9P2036015.
Non Si Spinge Il Sole Per Farlo Tramontare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5097cd0862509ff7514d32a20d37e8dd6cd851a1703e9370d0c33bb453d0e71. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USCGH2205918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874b4c85de5389c5d311acbb9f72392546dd0a5d36a87c03c5b75541ef09e2dd. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/USCGH2323025.