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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6205d26380761c76b0ac12825c7a6066a46b64f178b6ba85dae3f843d149489. 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/453f4a5b-4d8e-4d29-8264-210994c291c6.json and https://artists.proofprofile.net/proofs/artist/453f4a5b-4d8e-4d29-8264-210994c291c6.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b5a35da3109436a08988949562eee16bd1bdcc3025aca44a964fba2514356d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FIWMA1300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe2505e32bec97ecd9c004f6558884e00685ce106a9d599a4c17453fe3b4cc8. 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/FIWMA1200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f69a761b0d357d665b78b21e8efdab6dfaeee3fe55c06d89e10a7d503e2e28a. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/FIWMA1200328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c08fbf13a581f31aa7209077f78a3717ae049e66aa8d078355ec4f9ea95d70c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FIWMA1500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550c2da87c8623d1be73c31fab56f368ab9141cd23177d7431c5709453ed9a61. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FIWMA1500122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45272701f60d03c728f2c8efd525a424cb1a23ab1549b08cef5b23b2c8376bb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FIWMA1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6eb9bbcddb19c9442cb7c785559d75022b390bf9a386eec25acd443c7fc3cd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FIWMA1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cd5c8fbd9b145ec25dd767864cddeec33f1f7293917fbe3d65de0d3bf1f7cc. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FIWMA1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe673747839b53decb77de125bbc7640e49621aa89d8415a6dbc32c92d4e43757. 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/FIWMA1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38af15dbf826870b9846fb9623e5c4520cd2003516337b514a8779af71c4e92. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/FIS502024390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0822ec59a2d16ca2c90114d8cdd55a1e7613d744a2265cd1bd6b9a1a906e9b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/FIS502024393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb0f7e9ffd7dbc76e592ea8d02a2b22fc683e96f279c2457d601e05c4f3ae8. 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/FIS502024389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67747d42316e96836052746113451f4d5e934757f307243a4dcc6bf69563836b. 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/FIS502025406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd1277e38d14e4318c551d8f0e1d61da162a01a02d72a5b863b0d4fc12ff39d. 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/FIS502025408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f67d4eb117939f75a93a8aa53060502575b31be9aed107e263a2db13ce74773. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FIS502025409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57804d5cbb9fe25fbd6fada9086fda65d69f1aa7f2fde4b638a38286927d3ee1. 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/FIS502025411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cc84bc730d19783cc1a27e9223365c5161bcdfc0a7ba45516af3e377a88638. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FIARA1300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd295092e6f14fc99392ef9bcbea766349928945532a662cc48ca82eedcf7b161. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/DK6KA2301402.