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 0x56ed7eded74bf47864507dab80beec06c2ed0ce84c60efb52d9b54e3df0dd0d1. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/315aade4-8edf-4ea2-96f9-1035f2c454da.json and https://artists.proofprofile.net/proofs/artist/315aade4-8edf-4ea2-96f9-1035f2c454da.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 0x7429b8cd825aaa34c636496bf6f47a0f08f342bb1d7fba52b0cc5e30966861d6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USL4Q2440147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfbdfcba01bfa0f925bfb176a5456ebaa3f8007aabcaf68192b9275ec1ff178. 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/USL4Q2440148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6501e06001f28463184305a97c1fe8eee42f18df09ff1030c08ab1242e303e42. 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/USL4Q2440149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a096318bbe52c8a3f21c70ac6c8d5be446e18f2382d44cd4733d1d2fdf2dd95. 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/USL4Q2440150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88808f233367d11bb0d7b86246efbab640a4f4eb88b9876db4b0784eaeb3037. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USL4Q2440151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f90901fc5fa20532de5fd95d0db3112d999784bd0294a549f921fae0831baab. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USL4Q2440152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaffbd0e96278473b040b6a6c7a9cb764f31e17dd2fb86c4ddffaa1d7947cf71. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USL4Q2414094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a04bd4dcd947486da3f3d5059a1970d143467af17e4d96da40dec74440d038. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USHM82351033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49483f592e74c16e24faa2f7bd42ee634906e082b9e9d6c76cab5e855dcef7eb. 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/USHM82351034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835c49214b7b554f107b1dabe29a22874b084396709854fe3b25f9a54263dad1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM82351036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d5ff25bb466b3ffa502d88ff35bc642c83c6780e4d0a2cd85e56bb3a6ce912. 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/USHM91801638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cc39c0a72e5b2f3ee9c296274e149f0f5566b241eec9e9d15770192c3880e1. 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/USCGH2125487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e321db791c8f8aff083fc58c677c89307714f1d516fc0644accc92f708e8d8f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDY41887874.
M'Shalem (Il Musical Sulla Passione Di Gesù)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc74019e1de7bdb03d4388c3acb0aa1582a0cf506b2b956bf3e707ac2e4bd36. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USDY42339405.