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 0xa0efe7142edba971a21534b3a21ea35b0c3b4bfe483917ba4539fdf81b54f530. 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/6126ee85-a7a0-458c-a5b6-bf4d5b2b6c14.json and https://artists.proofprofile.net/proofs/artist/6126ee85-a7a0-458c-a5b6-bf4d5b2b6c14.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 0xb32355f38967cb13180cc63b89a3a0a7d84981337d9a390e13c7ae1ed9e380bb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:58:41Z), 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/UK3AZ2028318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9198c7924bd0c25636aa856fcc0d0d24a4344be0c36a50cf2ae2c8efaec8793. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:44Z), 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/SE6TI2166167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab452549254142027cf26567094e36daac299d5a220fd4605e656de98542ab43. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6XY2157034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b83407bfaaad629993b8d8702980c0fb36a5502040b43b0da332e7714cddd7. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:35Z), 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/SE5BU2231651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3979d855ba8979403ee68d73261e0ec97a4531f398fdd796e0ef1a6f56929c6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE6HN2207720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc6258119fba75f7a9871e65e4d70a1e99bd1e5b03404c927b36f7cf02994a6. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/SE6XY2337892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0010e17f176470ba8c2395ef8e7269400769dd9b3bbb200c0567cefee0ca637e. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:10Z), 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/SE62M2236138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8133b7e061ba93da2dcd4a513edae54deb1b2e6d1d726975435de49e1ac1e478. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE5752335829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde856031d7f0fafef57156c26d643d49fe44138a105cdb8509ee4c8d4dc819e7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:52:45Z), 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/NGB242300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccc3f312cb2ed1c1655ab6c8c0407c7ff7e3e21fc9c67481848f2ae08b56354. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NGB242300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0ed85be5af23a8c4db63f046b95f3aef898906d899c79bc33787a2f5d4eea5. 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/NGB242300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d424deeddc509c1d7e8a2277b0dd72855c41689b15eff9bdf4703b7beb1d1e9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:51:26Z), 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/SE6HN2444145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaee3e4870a82ccf29e9a03ddf927df95adf6ceaabd57774c7f5588142765769. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:41:09Z), 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/SE6XX2595790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440a5dff71f7dd4581d5f6594c1a51bd0938fadd1af665334f1f3ac7ccc44d94. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:03:46Z), 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/QZQ4X2500395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb279b3ce9fe3f97df7bfd2b7d5b182682b8123de6b2d9710596a2294bb70bd. 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/QZQ4X2500441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f22814fc96279cba91bd7a133111487203fba8ef6814eb9b68cc09f25ed897f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZQ4X2500443.