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 0xc07cbcb17da54ced40ad6761270128f543f6057efac463bada0270af9fac1f9c. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fed35fae-cdfe-49d6-8c14-e868e996adef.json and https://artists.proofprofile.net/proofs/artist/fed35fae-cdfe-49d6-8c14-e868e996adef.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 0x9c879594babf676e6ce1527cd2c444a262b41ad17a8c0b74b1918ed6df6ecfa9. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN52533169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789cf6c608740b35e1df2464e96f81644a7288d73e0dbbff454a3ad0ffd11002. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:32:28Z), 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/QZHN52533170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7824d35b282b79abfb77da815c5d7d68e1edc512f0e2a6702cb17398c4bd15. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZHN52533171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185cc7de68dc9132db1ee1eff9944ad64f467e1530a686ce4db7d40bf206dec5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN52533172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ec3f6fe51eb8c66aeb79bdbbef2eb3ac8b15c5c42892bd361216fcf44dcf75. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN52533173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a7304edebb163b381608a7bf257069f33807d5955968f6dd430f7f4e1d0128. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHN52533174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5637c1d84f48f6d41bab32334e92381ead225506b1b3632273d793bd72b4d8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN52533175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24746464d7c270b57f20c512b768ade44a6c0deeaa66f141530faa69ad04bdec. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZPLR2519413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dcfbbf73f0f531f544e5ec0e8344e3022459758e81f982a071f98d2c729da9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZPLR2519415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5220db07d3f5047a7c6d1888fee8f3519df184440a0847fb19a73e1d194bf3be. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:29Z), 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/QZPLR2519416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cff223cae4f7f764b9df9af590083f61514c9ca2a7cea10e0df10915aeb7815. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZPLR2519417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb555f264b5ad94d066dfe625e2418ea6b20e45fe8d6d70ede64aeebc6e79ce28. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:04:15Z), 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/QZPLR2519418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477c844862c684f06497332011bb0ff36ddbf3f3606683934b9d41ca46e1832a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:56:46Z), 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/QZPLR2519419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac51e551c460a5b7e2c77f192283c901f9b86986a9372ed8eb8d9d9c5e00fe0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:12Z), 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/QZPLR2519420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee81677cb8599dac8891b24477719a0639540057e40287dbd7bd76a58c5f2b34. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZPLR2519421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f543aa2c42e834df59872040aa826925a0bc1b2065ac1292edb0bf9496b039. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QZPLR2519422.