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 0x4568c889f28c9f9d3cdbeba96a1b95b3c7232c7db736530920483944b7a1e266. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73b89407-fa72-4e23-b8be-43e4d209ca24.json and https://artists.proofprofile.net/proofs/artist/73b89407-fa72-4e23-b8be-43e4d209ca24.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566df801d3dc87696d5f79c8fce97c18b3ae839bddadeee2d385346c52edadeb. 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/QM24S1905758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7e207af941ad0101136f25c5304a641de5eb7ee464f6c4ae3537d317b8f503. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM24S1912406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26d621b6f7335677ca9f5703207f5d6e499df31f47de2444146d7191db62ba1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM24S1912405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13db6a2d5664ac0ed7702465721e349e07bee5e57b342c3041b83d66ae078e0d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM24S1915854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b4935d79fa3061b20094a407329592270764cf851341f8b545b88e41adbf0e. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QM24S1917163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72efb766cf2f7c244d19ac0389784ea57bde7e3bb384926bfa9c460cfc6ebd09. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM24S1919881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3b0c9e7bb5149017408ed4bc93edfcd243256c0dd7e91ce2c9ef50925208c2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:02:33Z), 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/QZFYY1922450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e9aeafbc98b5881b24f7b9a4ad30661c09df770d35cfce102c2ad8fcbf33cf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:05:30Z), 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/QZHN41956150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3a9b020f80e636bedeb1201093e608aceb4f7a3cd8abea2673789642f84b0e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZHN51910371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc857c4a3d70799b888db2d9edcea802647824610fd5eb660926d46c5399d618a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN91956784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2988fda4f31d0df6521d96d847cbb51962cab7f8a5207853378185bf187b95c9. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZK6P1987375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8927f88de3824e104179ab9b96fd687abfd9edfff629530ae60a482a0683a1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:43:58Z), 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/QZFYY2073156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06548c3d39e7697fcb65e85d72b7ed23e80e7f3597fa61973b91aa54b00fcaa. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:11:11Z), 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/QZFZ32042418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa922003c6a6f60a1714326139fd387be8ea2174758e19091c074f69e2cc95253. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZFZ52023457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d7c154bb31fa29dd5636e373d6eaec1ed2041e08b48a9790cc877a0cb9e3dd. 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/QZFZ42194427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663826a6791a0fe689d928e7d196a5f8cfba4717ddeb2f37f27288edd39e3e39. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:21:09Z), 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/QZFYY2255783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4814b5fe90f255a5ce09553e2326ce1d34e981acc54912902df21eb28c922a56. 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/QZK6N2270047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3f5a456399b2f5824df825942d55c9e49f83a138b2d2009f0e9ef91bb88fe9. 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/AUMEV2363311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09c62b504c3378890c9012350daadf69079fb3ddc6bcf6037c11c42b222d9ac. 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/AUMEV2216406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3523c0bebfebf5b8d08cc23e1d1f3ad1e0d93b981126187db9158a879bcd3d3b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2491069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e6c98eb07d146264871f1e7f9a9b8cd5c398bb41fd82a2f41a3ec893c379c2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:04:04Z), 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/AUMEV2360702.
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