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 0x8031def5eb394629e32ea336443d286369992954092f5e20882e14ecf014c7f6. 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/0e069ca4-9c3d-48ff-ac9b-d6427abe6f35.json and https://artists.proofprofile.net/proofs/artist/0e069ca4-9c3d-48ff-ac9b-d6427abe6f35.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 0x6073407222fd7e1438d165b068d6bd7b172dbbb51d1e0302bbec9cf50763c185. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHN82482818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cef08cc1e3fc4f7bdc2d276eb9a3b2f1d16a9c07e1951ea362498dabeabc645. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZK6M2406310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee1073296c4b607754284e1f63933a0b0a9aa91906e54c92393660936a82620. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZK6M2406311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3dc7df4d6d8083cb0e7066b34cb87cdb6c5a1320d19269217038a4e9797b07. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6Q2445293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee43a36911d18423f1c2056dfaf3d8e6089cd61dbc0b232d05a9333f7bf80ea4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NL9KQ2445270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad6ae7b5e8f7f9c293b9bf5d0e70d5cc23e22a58134fee5d12fe70f2dc9088. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NL9KQ2445272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5342e81ddf12d6378853acf6d230ad80d3992bf725c09a36fdb674d802c3810e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:03:56Z), 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/NL9KQ2445273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d0ff6e747fdd5a28522c2bc0377e3dc4db66870c7e8373e8d58d4a66524fbd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAT2467342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5b39fa7476138e6f5f90d2d2aeead737f35baa37d3835d884588127cca45bc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NL2J92401416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2630808372abbc3d506f9bd8ac7c1e5c0695488bdcfd49f82eb2a55dfb4bd8d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:45:54Z), 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/QZWFG2453873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6367eb439d8fe600a067d8b1ccb8e1593ade8cff3d9c0c0a7080638c7767c16. 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/QZWFG2422604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e2566e849579eb648639bc9fb58f5ce1d5e7b54f8d9c4d32fcfb9bb8317e3f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:27:45Z), 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/QZFZ72560442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aab602f45753d45fb6cb40b6cbf96aa5326f39e0782ed6ada7e4795f2208a59. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:50:51Z), 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/NL2J92510789.