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 0xbfde551442b5db0854b24358ff4a00bdad0e8b539b9c299fb5bdb5f3d3fc1077. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdee5895-42b2-4546-b1b2-54de7ce00ade.json and https://artists.proofprofile.net/proofs/artist/cdee5895-42b2-4546-b1b2-54de7ce00ade.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 0x327ffe628205470f1aadd23901f3834e4b8872a075ca105ff7092c636cf2b404. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USL4Q2255209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b0a698167181e2d4198a6dfb81d47ffcae633461912e01d94ef38654a0d76c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:43:26Z), 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/USL4R2238255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31994bcc5ba6fa39fcca051f8b68805d76acc3cf04faac94cc0fc79d686139b0. 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/USCGJ2397598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb1d9f4da6b962488ce38c31d3e11e4a8d143614741214f8004592380dcac3f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:23:34Z), 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/USCGJ2397600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3bb8f01bb4e366189501a86638aeb09e66dc233eb9e4a4078dad247bddeaae. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ2397601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b94d1065db889a6bcf8569a75b77ae5dd886e4f0334ceaa8bb79c116556075. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USCGJ2397602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4af68561d92efff237bd22e713e38e21d7ef3b9a6b73d8127aa5a09f46acb6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USCGJ2397605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcdb868c2b02437adee9fe010489b9d2b64f15d1c0da9c2e99bdd0681f48c8e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USCGJ2397607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd437f7a63739269c346283b2eb1c7125716062a54b75bab801a9f27d3990c69f. 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/QZVEM2374634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde415223ba194bc601fbe14b473097d7706c77e46bfc5e6d8099a8abafa33ef5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZVEM2382123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ae674f6746ef93440bf825be84108f19b6f8dd7477ab8886cd8ecb9588a7a8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZVEM2381787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4743c1339ae90f4adb4e775431fb33976b1f17980cdae6cd64247484c347cedc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:32:22Z), 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/TCAHZ2451783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91663e1b7653fa0e576ee6c449c9420f8962890885df90b30585883668333c0a. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCAID2474757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8112097e15ec308692f5e4f66a277812ede214831091f7f78689570145c309fa. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USHM92494916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b63f14c5ffd3baa3ab3abbdb0f1a5565571aa7f66eb93b442a5c81b8bf1f96d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:00:13Z), 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/QZWV32452514.