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 0xdd405c341a5393c45f3178549a8dc088b0c22eaa611f73d6ada07dfe8704b4ff. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aea69c84-b1fc-40ea-90b4-1a154f6366f8.json and https://artists.proofprofile.net/proofs/artist/aea69c84-b1fc-40ea-90b4-1a154f6366f8.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 0x2b657a0bf73a477c227b6e8a67dd17bb101739e32b537e7e8cbdc3e729064576. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GX3Q92386683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf369f9ba6cc4bd75084a20173ca60640fd5e34f04eddc7e26a5d90478218321d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GX3Q92386684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1eb28462e53110d9511993bf9ba73072d3c2eb43c114db3c7d87f3f25b3f9f. 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/GX3Q92386685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2972c51eb0520aa1f1e5ab9fcea441938cca7f92ebc9f9859b282f8956a20b0e. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GX3Q92386686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c32ced5deb7e48cf7f9cab61ba29890bf8c82fb41a35847cd0165eab1b3053a. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/GX3Q92386687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88bc4972400572bcfa024c780d385ca6f6dc60a2c4d93305d6672566ea86b14. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GX3Q92386688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a3242b9ab7753d095d867ad6a5d32b987b5282ff9e129b08456205e5c4f4b6. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/GX3Q92386689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2a28f5b38d74316e10e70f332a1520b31737b91d1919a22c38a8615e47b662. 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/GXF9Q2586414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd36ebc833a78f5864f1f867588e3cf21cf82993ebbbd91ed3e56284eb859b73. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GXF9Q2586415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb33756367e485e57713000191ad95d990f3fd43cc246db970e9c1b664c0a76a. 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/GXF9Q2586416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b08aa190a139e9e1a4e6f833f1ada8c6073082a692760c5247131877961aaef. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GXF9Q2586417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7dc4b4c42a6e4659f0f07228ec9c8157f3064639638bb6ba5440ae9ffe66f1. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/GXF9Q2586418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb14d91ec5d00304ae3cc4eec2659e8f82de6e4c9bc638ff6015492950577be5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXF9Q2586419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca2e32eee4cff15e669928bd486cdab1af48fb885dfda8bd57728aa2e4c11ce. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GXF9Q2586420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00200ea9d258165ddda3351db43c92fe28b8721c5ccade281d3c91c10663a02a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXF9Q2586421.