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 0x5eec09850024ea4938350514dee5de6ff516c61e1d8e68e59e690bca92655639. 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/307f1585-c8ea-4f4a-8c46-d5131d458975.json and https://artists.proofprofile.net/proofs/artist/307f1585-c8ea-4f4a-8c46-d5131d458975.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 0x63b2f93f6659b65a344313d8df1328ddd0282add0bb43943672bba48f99f4fd7. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/FR6V81505390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c2d0bee1420ac2c9a4aaae196b043399a89f854a02c2fca941962821d5b5e8. 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/FR6V81491558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2386c76050315433ee84e35fdc3df7490e94f0ca3e6e7917c605cc3b89d27686. 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/FR6V81491562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04beb48504f43a237e1468bf76eb7a18668ecf0bddb6977b00d3aa767496c49f. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:36:37Z), 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/FR6V80056713.
Partenopea: Best Neapolitan Classical Songs Rearranged
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dd49f045c68bd632e9fad37611199d4512d278072e558d12737074428085c7. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:42Z), 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/FR6V81103057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1407539de2870106fc08b68ba8ca957f70813fe0edd11d95ab7748a466e939. 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/FR6V81104736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e9ca96f2d8f62041742afb7b19573d08c5f15a7f0e1f500ba65c4bc54d04bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR6V81498346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7ec343fd8d98267afa83bb0ebcce6d87f2ce393cfca3105f4a3ec0b174bd36. 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/FR6V81498347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe885dc65b122583f3b6ec600fdc0ba089512f1c5964afd8560385ff3c861bb91. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:36:23Z), 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/FR6V82323623.
Cenerentola (feat. Lino Tozzi, Marco Ponti)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cdda30d4efa47e7c010b22628235ab20ca85bf645649781c43e83597675cf9. 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/FR10S1653567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec85d98df521af6f5bea3ec784f8b5cb6d71a727454c784cf64bb625c3f51ec. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:15Z), 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/FR10S1653569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2e5804f9f2f2ce9e3e8f92617c348b378d9025cb55db4537975071f17b3c9f. 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/FR10S1653571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3a9228ada608da68c127d9956bfc6c988320089da5aea7f09494db63d6e678. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ITH471804102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9372e455afa02e4bd4852b247632a3f75d3557fcaab19fef44b402d200819b84. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITH471804104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ab108e26d9c9527d9f4a035931531ae6b1d5d8a709f5d3d7b4f0774d7f9872. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ITH471804105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc776fba820d8cce47de89b07591e526456d7913a0b730ac9f4cef0c774f5781d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:42Z), 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/ITH471804107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4bac92bc785e8569755e4eebadee3d256a7fa1b05cc92243738984c3ca21c0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITR631900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba7cfb209da51eac6bebd7af7b01b2c530523b4d7c93ba9868593451dfa6be5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/ITR632000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a296989b38c5e057ab6533c4e8dab1803da2c922923d2d9adf928654dfc706. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:50:37Z), 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/ITR632100251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305ce0e3b2b159d53e179e9899803ead2159ffb34a6ab685363d02f280c5c412. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:09:00Z), 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/ITR632100437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec5a7b1dff75871ac2b20af1d5fc682a971daa15c3111e8418ba35f749243ee. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAGQ2250935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf08ca2fa92738f934a4ff9e129415cb0413b7998d95ddaf9d042f49e004fdb9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:51Z), 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/ITZ0X2490042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525275a24b5b09d9d2675d90221083ab13373805e62430029a6657da954dedcb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US38Y2414183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb07f0393eb1093e9128bb19e26c9fc535a2c0b849530bfad1de78f4aeca6714. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:47Z), 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/ITMF12300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9657944028d2c3f42b1d5c000d5a9f73bd1290a243fed68bbcce58c23eeb04. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHU2436549.
Petrolio (feat. Emiliana Cantone) - prod. Stabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ff14182b0f6b1807706d2e2fe4da43b0e87be9ee68bd22964ad9e2130a97e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITB002000098.