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 0xaa724f5f2ad8042ebb03f81b0bb7f75ca659e1ae45936f103db0d6bf907cb201. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dabeca93-55aa-4c3f-afb8-29beab5ae635.json and https://artists.proofprofile.net/proofs/artist/dabeca93-55aa-4c3f-afb8-29beab5ae635.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 0x75a8816ad4af7b81005e2c186613e9e0a2bd1c1ffb149f4440bafcfe8a46bcc2. 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/TCADZ1878793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a21f567fc340f38a92fbad115b913be0f6015e9b2907f24540c740a6419eb7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAEK1961047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2084dd1c3c9608ed1fa693a5853710d443196ccd260bfd2f64272646bf8b7b6. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAEK1961061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeebbf15f74b02f349ef53a6d3d33ae8011da0aecfeac96d86adf84be3887e2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAEP2042481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b40cb5d6583e4d454cefda7fe0f581263abe7d02c8f5f5f8062668a58b58e64. 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/TCAEQ2060649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648304d851bf5294445ba41fdc2ee1f453ccc6c2395f561b6781919e8b3fb121. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/TCAEQ2060658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf539763809471704cf9cf578750a652770db87b3dcbb1ec5803c8384665e018. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAEQ2060660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba870b37ae641a6ae3e547833e08ad9b67cda7b0406ee343f4e6f20da434d48a. 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/TCAFE2002067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd065fcc8cabfa543da574a9bc69b9f3fafe82bd7e3c51f0f4bab15b64bba650c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAFE2002104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58407dbcb5e84c7ce2b813fe63f5399a00e51e38b311686d4f3fbb6e7e22a190. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAFJ2172869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e82e3dc1678ea541b8e6621b3b79662eeb454543a856ec3b0795473fe40e06f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAGG2244058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45dbd6590eab3f377243ac6fcc56d729a1e124682e01aa101feb4ec8d868d1e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAGP2276969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e17fb0c7dc09a83b77a7a3b1a921c92c927d84632ecf9875140d6e4c76aee85. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGU2305819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f6d7e12515161e6609c8d6702e1512b3cd02fabdffb0e1c1fcb420e6cef4fd. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAGU2303540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9ee8f600e27be71f468817d6a7d9a191854dddd73bbf2fc7b86025688f3c4c. 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/TCAHG2382283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dee30d948d5f946aa2aa220894e4102c920c85574e0a1aac9e25e71fd6d4c6f. 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/QZL382522149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b633cb5f7946a8dde914515f63b6eb1bb738fc6fb8ade57139efe7b136bc744. 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/QZHNA1941554.