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 0x7de75693b902e94bc251f950f927ce08b6f67747419c57cea41ccd787813a9b0. 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/679b9a3e-d3c7-49ff-bcdc-90b52cfc5cc4.json and https://artists.proofprofile.net/proofs/artist/679b9a3e-d3c7-49ff-bcdc-90b52cfc5cc4.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 0x1ee098457c0949824912b4457eb4db6749bf3c8122fc1d37388465ad29ef439b. 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/TR0011400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642acb630e067598ec495dc9e73531447363e88514277e02a8e388877a5568b1. 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/TR0011400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b2b2917fadc9ffe2e20dee4ebd4fe5f96770d1291eaa2cc015ce5b870049f9. 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/TR0011400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf0e7e5899f24db40686c224a2ab74299e870b6bd847d541741d136a0fc239e. 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/TR0011400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc5cea26ee7b921eb15f6e0b4847612009383c8e77b559474428d5014d9187e. 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/TR0011500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327ac8474438fea12ce37675b3d018f2586f21d2f914c6f2405fddc0bc719d8c. 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/TR0011400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed349c2172ad6cd0c205ea06e52bc301daacd8ce53ca21393a1ff7d8b1a7cb5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TR0011400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83378b86fe4a53dd1ae24b735e48f936764f4cda899bf30669efd0c8d3645b9b. 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/TR0011400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8478a10038fdb2b52e2fb31a55f866181b9e684dfe6840500714b6d79370da. 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/TR0011400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa219a4ca26d119db19d25d8f98957baf8eea2485baab2aef1600f3b1dcc46575. 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/TR0011400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec23e9ff6d49607b8acfcf6833ffd266c9eab45d1b5d3314b14157a7c91d5e25. 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/TR0011400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd159b52f88dea7536de7c18c8a6751366b729f46dd31c569f31e9e1f429028b4. 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/TR0011300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2785863e1b2ad8cc38bd7c21942914a821ac5906cfa1159e5d7815c2680a5965. 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/TR9491200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5953a15685953536b225f331ef7bfdd7f0ee8a09d7df666cbeb0b20cf9f214. 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/TR0011400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71891185ab01a689df3ce761a62400dc2618dd212193b6d5a862da26e4a9c893. 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/TR0011400227.