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 0xa2cd708dd781367e8254d6dd3a4b35f0bc861627686c183edee1f6f9385b243a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1121b039-0b3f-471a-ac8b-89268ff470d1.json and https://artists.proofprofile.net/proofs/artist/1121b039-0b3f-471a-ac8b-89268ff470d1.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 0x9d14142a0875b283579fdd755c015f6a08e7e7ef9f8de65247b9d28c751eb494. 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/QMLNB2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89aed23a81ad81f1acbf1f00febdacfd97c6c02fe7e55fe6876fb89e9b2a9d1. 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/QMLNB2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6358a56553c02da2ae4153202ffc1a6a351e64c7060a5b1c480bb66d8b12e93. 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/QMLNB2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250dba0dd2687c43f43693b3818b1fea20e3e42c91f9fb14eea2648708bf8f28. 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/QMLNB2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9065d53cee7be8d562d3b29b54b903d150244c406fd04ed154ca763c838c2e. 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/QMLNB2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1074dd159c4516140720b82b2c78497bf97dea87750f5534e3344aded5552e9. 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/QMLNB2100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17883fe6f02d12063ed8a7f108da5fa4a920b43b82b02afce24840d69469dbf9. 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/QMLNB2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86f5c5aec886c26bffece9541108b034c7de697504e778061e8851e8676779e. 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/QMLNB2100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd24f80f5f95562861995685143d43a42037b9cc9d77dc1cfb76577ff40ad052. 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/QMLNB2100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e26171be95803636eb700e96253ba5f2d6a33a8129c01232243a5aec72ebdc. 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/QZYXP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbea71f16511998c45f7accb03929753f0af5218f69c3f6737f79b8dd778f62e. 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/QMLNB1900075.