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 0xa9477e06d0a2a8e8e0e3c1b6b1bbbacfb37c6ccfe4845c894ce0e2d3c73219ca. 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/0fd0c5c4-174f-49d8-94e8-a7d49d31bc4a.json and https://artists.proofprofile.net/proofs/artist/0fd0c5c4-174f-49d8-94e8-a7d49d31bc4a.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 0x610c4e233c02b01dd51856e4985c7451864953ac44e6979875eae0cc30085b65. 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/GX8LD2438974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf310dd10052193d90b53bfe74ed326c898afb09e8332bbf6b235d835e47e7bc0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8LD2462848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e0b46cc5948cfca64087039615a81c38e906ec0ada61ca8fb25f10d8de6e0f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8LD2424745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1e271732d6e3eed530bbada7178fa7911dfcca9a6e1a42c3cda7250e3043d8. 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/GX8KD2452896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a654a2c425d74a4fb09a495baf2314ce48fa6c23a889d8557d6fcf6194a147. 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/GX5MY2388173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bbce8c4d460a73584353070b760e85c5b6cea5f5baa6c49c9064f4d8ae55bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX5MY2358338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22bc4d7429505d41951029d3aac7c1d71254b0da644b2f2365659f23959e920. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:22:39Z), 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/ATEK02355879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cb9c060d04eb8f73599716038f4b77b059e986adff71941ef5c6ad6003685e. 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/GXBDS2335816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5611eba46d60a0f116f8bbd0ba19b92aa2293c95e2de34d0970109fbfb9f056b. 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/ATEK02356000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a2a5d80e73cf2a51bc1c826947347581e2d24ae6493176cf8ba216f1f271d4. 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/NL9KQ2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf446722b0d02cfcd99cfd44dd91100e1b54099c65f572fbf225b390cb92e0722. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZWV32321026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7ae8a67f6fc0e5e089b60c37cd561bf7cfa16c7626fd37cdb12d38021c35be. 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/GX8KD2348829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3f6a5739705dad54dbbe722db0ba3ee7b5a00717e363f46762b86d45ac3227. 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/GX89G2369082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f66ad1554704f2ed71d8139f2d0a2f9a71c8e26ca68a5b34c77b5a09f287060. 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/GX89G2351930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e4fe845541155259af6c70b0b3de2800739425224f10ed093896f79b0bb461. 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/GX89G2392227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb697108783546947e6433e06ed7f928709613bb48dd51643c62ceba5e0778e. 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/GX89G2386681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43096490ead20f5474f7099e6dd48843d2ccc6d96a99aab84d88465dcd0e840e. 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/GX89G2364598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0b408832a2a60d4b45e2a81659784d2d16faceadb8a7e95eea53d1ddced7ad. 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/GX89G2296478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fe7bd10ae38a2b863cbe9a3c729d71c57cf7c71a2d07df9dd8af70ac1a9622. 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/GX89G2296608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b152b27a9cd9eff5eb84fd99b7cee6fecb76972d8153ab40ba61657196c9ef. 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/GX89G2296602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fb1267331d2dd54bb9c2e5973c7f8d7c28351fd94739127bffb18897e85c5e. 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/GX8KD2201415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9409490e5ebd99e0eca1375255923e6d102ab046950b589b2e8b3b9287b38f0b. 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/GX5MX2230931.