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 0xbc1d3a39b2d6e3d540ce753253c7e3038e9e92e4984477ef8464a4db8a548c6b. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c06e433d-b914-4069-86fe-2e2ece9fcfc8.json and https://artists.proofprofile.net/proofs/artist/c06e433d-b914-4069-86fe-2e2ece9fcfc8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Los Colonos (Original Motion Picture Soundtrack)
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 0xc65c78f4416da05a66251e8010be5f0a055d7ea624d12e3900cb501c06db2dee. 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/FR9W12414201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b66fcdcb3ae76834cbb5bcd99e954e23c9e275f95da74c8faeaff28f0f5b85b. 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/FR9W12414208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fc723fcfa9ca3d3bf37ed7e2466d88166405671774d3cc766db484ade7e023. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR9W12414199.
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 0xa444be1866de4a51e47b9a87f7f2a01fc8271eba923e1f808c55399782e60185. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR9W12414200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bf91f1ecbd34ce6b9f08d109a5b7d3ccc8c6a4c70737f0192d1b8ff551328f. 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/FR9W12414202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6e789058375a2bd5e50b181c01b64a900b568eb6413a6371bf739fc19548cf. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FR9W12414203.
Au bout des doigts (Bande originale du film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbfd39670a3acd59f16cb5494694ab054357783331493357ad2b7bc11132e4c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ811812031.
Prélude & Fugue No. 2 en Do mineur, BWV 847: Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bf95060066cf3952d397910f6f0de7daa4e3c87f41d658780d9c26134aad75. 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/FRZ811812032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1bdd47dc364df0519aadf31488d8cde64ddd3f0ff3d867891ccc38275fc0a9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRZ811812033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266dee1a3a497b8c987a0fc04bb73c280d95534161cbba0ede4d5c96f2a9b3a5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ811812034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66badc804e5e85d4d6c11ccf40be4916b5671098a5b9af0dc4b048f677832b3a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZ811812036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3709327abf78ad3d48d2a5698c7691539fdda550a774d3064978b85d814900. 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/FRZ811812037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac156e61401e94cd5c156df0016d911e6858184a72f0ac8edb416a41475fd181. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ811812039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f8647293269c185ee6edcfb0d10fcb451cb7aeeeececf8dd38b8ad9c86ab29. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRZ811812040.
Concerto pour piano No. 2 en Do mineur, Op. 18: I. Moderato - extraits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f7dedf8b80035d4eb28c03e192fe8af797815fc72466ecf48b68139fb21795. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ811812045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bffe58969472b5afdf2ea6408fd02b5665355a67aac8e14e1b554f5eb2ac526. 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/FRZ811812043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d397d165efc978a74fe664e7ac9ead9062ae4756b3e51047d2a80137e3dd9fb. 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/FRZ811812044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa409234251f7cd64487cf4c82a66133dbf4227d32a2525427a61ba27d1bc88b6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:58Z), 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/FRZ811812041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8581ae41cbf5b2e142409da1fa1cd7f860e65b172364965d54ffbb3711644642. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/FRZ811812035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f555107f9d50886c13c495123b689c0396271df443ad6089b6de9ffc2513fb1. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FRZ811812038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf469a73ba74d6731609afa1275a99b6b1e1c7f3a07798212abbbe286ca2310ae. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ811812042.
Cinema Through the Eye of Magnum Photos (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42deeb4ff2b9ba006b30edfec7ecfdab1880d0acdeb1a46e834a5c57a2cbf495. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9W11702732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb2c5547ccaf4cf9152b8ea9de7e8dd42c5f2a794114bed60b249910c4a2c7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9W11702735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2119a04fe7b5b2fc1d2affc6079cbf96813cc880aa3ecc8a371a16d44fdc290a. 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/FR9W11702740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4b0b71c73da23f8d51f97739ddbb59967541f44a0b7e4b5615c758df65f841. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR9W11702739.