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 0xdac78e6cb3a418c539ca494d4ff0ff48995068ce084adfcbbb30eb4e93529ef2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3bea4ab-d96e-42f1-a646-643aff615b3f.json and https://artists.proofprofile.net/proofs/artist/b3bea4ab-d96e-42f1-a646-643aff615b3f.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 0xf589dd50b904c2b9b631fc5fe7441256fae436910de76af28ddf9335f6d1cfe6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIY2469084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9417c112565583083ac22802474490e3d01e7bc15c086267314f0b0fb09078. 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/TCAIX2480923.
Memories (Best of Farrokhzad Vol. 1) - Persian Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8677dc32f67d4077b19bc754c520b4af404689118a1b9d66a0a55fff5d05a5c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:01:06Z), 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/USBMF0223501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4653f03e7ce5387ff76b1454a2640b6bc10440ad4c00e9f8882b8431bc200e7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USBMF0223503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedfa80b583e5657be38f8017ec611158d6661521aa16d07a6a4e6728943f730. 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/USBMF0223507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2133e2ff1aa15590415015b57ff1309e344a61a862e870a9af892ad5b80b391c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USBMF0203503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c914d9569a0ee9a87045b724bf49868b17c09e3d69f5c4a28e09eab250ec68. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USBMF0203508.
Memories (Best of Farrokhzad Vol. 2) - Persian Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb36cdc91234b48156bf80fac1c9f4b6c08ced20d5fae88a95b7794759c26139. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USBMF0223515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc317ef2f7c300b37850658a561b57d1c687df38b3b3c74dc6b2fc898a7bd43e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USBMF0203518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1800aea867f65bf907289f61ecc2c5dd1c077c4f01e8f804d09ebd991c1312c7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:09:49Z), 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/USBMF2139511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244991e28c27858722b614cd713c57c727c4298f3aafebf90cba983dcf154b2a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:40:53Z), 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/USBMF2139512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a38353e994e08f00eff91878fb006d7173709a10641253aa226547a19eb5ca4. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USBMF2139513.