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 0x8f014e102baab76b7b96c5080423fe42abc38c3395b44a859e931acdbf1bd1d2. 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/33841d2c-c300-4874-b7c4-47ef66e8144e.json and https://artists.proofprofile.net/proofs/artist/33841d2c-c300-4874-b7c4-47ef66e8144e.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 0x6cfddf5bfbb879760132afbfd03f77b374922f9086042c9eed59a20ee67cc175. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BEZ351500248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc049aaed9ea0ca94198321dbf906106510deafa9e3321a462ee250ce1cbb86eb. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/BEZ351500250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858fd66076e7a5f1bec59d073f85fb25848ed0a5988b773ae53487f77581c3d6. 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/BEZ351500251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72ac9c518440f5f22626063ffb101e9eacb77e0f9c25c44c69957169ee9ada1. 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/BEZ351500252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ca8afa434087a2563d5b94cfeedb8a89703c69923d9e3917116ccc856c6ee7. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/BEZ351500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d67fc9621d5e112f8a8b0bafce267feb871d7de0006e5e3967226caa55ed13c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BEZ351500256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19a6a927b04e28b7af3359b61278cf2bf872550a2ec092e1888383e11d9a69f. 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/DEVU52486617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7548918f3826bba1a89ff82798081deec20d16fe4939721e4c5dbb8ef3387f0. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:28:01Z), 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/DEVU52486619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0648ccdd1edea6eb2583fed9b730dcb2d0ec6b32f12ecd11800881f2edd2c8. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEVU52486621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bacb6c90a9d892bea9fced05e8ece16b2166e27b957ba5ba6793fbbc10fa681. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEVU52486622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf498bfa613e4e804eea6aa7b0dc5357d11c0340bfc982e3b13c3ffb1a12c324b. 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/DEVU52486623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a6be817649d69c3d7b3bfa94c981300b851657eb2b3571282c16cdc8d23599. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEVU52486624.