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 0x7a8a999ae62cc802178e4f45549c57f35dc11360774714f11f194769ce66d5bc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e45a22a6-008d-423a-910a-0e3e2dbb4cf0.json and https://artists.proofprofile.net/proofs/artist/e45a22a6-008d-423a-910a-0e3e2dbb4cf0.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 0xe6def7861d46e14c4ffdebd1d01747048823ccdce6d7557dac78278e0c4f685d. 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/QZ7R41950225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcdf002292f0cb14193a69be85dcdf41683bcb43d8fc771ebb03b5539a18a20. 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/QM4TW2385129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebee9ef3441a37db2839d011d508817ebcbdee1813ad78e2c373164d8879f21. 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/TCAGQ2234700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3511c412bd8e231b44380ef64063aba56fccb7cb0e8163013508e974238f04e3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGQ2228626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b7404cf2761341fef81cdb16f65c44968e35387c441b51e436c2b58a5e3650. 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/QM6N22463788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc710080aa02a1911a4ddaf8fc77ca7c3ccb0c913993ef4056e9763d456641353. 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/QM4TW2100838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3d1218264662d1dfa3c5f4d120582c9d3bf6ba83323a6238a5d21c30587c26. 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/QM4TX2106812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ce10c8eb2d750cbd103d3b94d0692af17871fef4fab9a1ee45dbf55ec7db25. 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/TCAGQ2228399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0abda08c22cad925f69afc779e327f773165c181f34a364132982f5af4051c5. 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/QZ7R42050352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1867c67fbbf2c6ee19ee5ee616e344e09cdc9a3f1e4e753c6d5355397adfc94b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ7R41952108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b2463adb0cab4cf348c8d3bbd52dd0478f11e92ca6bc2b662bba5f50d6a91e. 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/TCADJ1754804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4ba80c9cf31d2db1776207d4528c36771ce0417bebaa55e759fa65f8512960. 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/TCADI1711536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92c3a27d144a5b6f87ea65f0f6a812b30ec0ecf786a7ddc3566d34c5baa056b. 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/QZ7R42050449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6a30bbbbd91d60b51a9b47c896672fd5e19ff0628cda31ab309147e6d2884c. 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/TCAGQ2235085.