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 0xaa9d8ace0ae984be88c6272ec6bc38438ebaa14cee867b5f0df674a63f7aa6f6. 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/82f34fe9-ce58-41d8-afca-7b542f721672.json and https://artists.proofprofile.net/proofs/artist/82f34fe9-ce58-41d8-afca-7b542f721672.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 0xfa3947441af95b9fb33eacfc70b50ff9d099d9c0e156e3dbd889272c766add81. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DELJ81605688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af082a44359faa301788154dc46def54edcb5ec61e2e232dc39999a301d85ba. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DELJ81938491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f687e3d7545789b6c1f4741a8bfc5a5e4d87d246e833633ccc7e6b3f35a6d2f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DELJ82085823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1345ba1858f343a461294c0c524e013a8db6819a2435e93854bea094ca63dea. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DEZC62167184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dec637222bbe647a848d35053d3d96c2fdf9c9dfc27ebf81bec7bfd445a3524. 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/FRX452226533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bc90d62cf769e5ec8a3c172dcd851af5ceee594ff156528bdb0c71d463ca6f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX762227222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568a95b08d19a74eb076703b349a2d3c9d01c11a843d2eb79fcd08249cb34300. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEZC62364952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d0e99aeac61ec9001589c7d3595169534a9e6901dcc30f214f6bd3d48d453. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DEZC62499998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597e03b6fe989cf7e96c59d999b19b1b5ff50de5c74512a555514335157a6ab8. 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/QZTBE2474813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e54e8fa4503a35e13c128096493a464f287f194864eac76f233c535ffc5669. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTBE2474871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bee7a01ddd25c9c9675ec27c20dfc1c4885adf122103e94afe0a24ce2bfcd11. 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/QZTBE2479414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d76d19197a1166db43722ce3e0adf1c283b275d3ce71711b4dca100dba22ad. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZWFX2462025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0452550e1251ad4fdba34c86d64a504545986dd96c93f73b6393080966aa582. 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/QT3EZ2484820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32895b65e038c6c9be5d32e83a9ada82e1251a7d97a400594bcd90817efbcb4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZDA52522677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1416f7f94aa773c15074401b5fbb973e56a9da16788dc018acecc31867b77c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZDA52522678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325b0c29afc72bfa7f068555fc41ed65e2f494d1534fbe9bb51fca8b42dc079e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZDA52522679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48d44dcebbfad085a637cc6cd2c6e013770184f6c7348a8306895e7f623e503. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DELJ81605689.