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 0xe363dbfd0d0ca97c509dfecef9856eb234ebaa26af74fb58758d0abd741ad15f. 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/dc8e36d1-07c3-4a33-af43-20633c0ad2cd.json and https://artists.proofprofile.net/proofs/artist/dc8e36d1-07c3-4a33-af43-20633c0ad2cd.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 0xd2cf4433f32a0d0494101144086fb416f40c22499a89ca233acc6d8b7a98a89d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZ8LD1722413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faa4cb93c2679d453935acbdd072bc3d814c47398e1c20e611d53add8da3d70. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZ9Y21711762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0d4834926f1fc7c1f335844cee08b1af3b1dec0afd0d5131895ba91ef9833b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZANL1763148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437421acf4ff850cba894cb49959d0dcc1c003216c55e1b43e37dfe9f862d424. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZCE61895283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5e7c69740a995baf60d879fd2968d3d6c34dcec7e3c86bc861d2e705cd5ab8. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZFYY2078533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9590fab57bd321a1147688939b2cffbcccf2b0c480bce3b06d2e5106efb68b35. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZFYY2078534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c434275455b3431d650e361cf06f48bf1d90593e253011e386c6075b0688bd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYY2078535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b08c266082c134e99045642c7690053edf2c09302c9e5732f82fb10243067. 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/QZFYY2078536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0807cf8499ae595b4c6af40f7cbdbf921cfd5e6ded4b26addebf8fe2036a3efa. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYY2078537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9042bbd433f96711e20b7530e00ed4b2715b49eb7a6153faf4ab75dbb55fd124. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZH5E2221050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa8faedeb7c7d90d59198ab73ad8e61cb1d416a82c4e07261dcfd4e723b1d0b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:24Z), 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/QZK6Q2322863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11cf995175adfc004fff17120a7e8a4fcae211ce22621de865e13c2544a6082. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6K2494268.