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 0x8a770717effe06426bc63e08fd12b1fbc2db7f6d3d5b5bc78add7d177af115d2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8134cd5c-baa9-499d-94f5-2f5c3654e237.json and https://artists.proofprofile.net/proofs/artist/8134cd5c-baa9-499d-94f5-2f5c3654e237.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 0xc595c596519b39feb9780bea62232f60c0c32b1d5b36e849bebf4a9521cacb78. 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/QZHN52585880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d14e098f4bc042a85ae9d37c5005b83e3baf96a0faeff36d11258fc9053aa2c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZHN62505063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e931a2f1597ed0c0ce53ab7b0a6580bc91ea609a87358f47a1de5b6fdb5616. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZHN52594215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0be0682543f6ffd58369d40a9b0d35698b35f6bf56cdb8ddc917120eb78ab5. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHN52598545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b4e3db3c836d76ce56ca334cad7343decdd1d800efbb116a8b95ceece2924a. 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/QZHN52598549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e06e54d7ab6260d60cfed70bfeb7479e1c6b1655ffdd96594d63bee8976cfa. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHN52598552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6a50258b9b6cfc780e2fe4430328bb622a0c316cebb748c40340cc05f18c94. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6M2599231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31430d268832ad8003b0f334a47b8652637dfc92ecd03920272289d706d9ba9a. 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/QZK6J2572736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908be1d6c8cc54d2e08f5171d6b10cb7e4ab7ee738e27192f1976ce3abb53e4a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6J2575229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a9a2d8833faf63bedfd4bec0c06e6662c40eba16d600925d4585ce675aae9d. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZNWZ2540599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf248a378e66e412e2987b390fb9b44da8a96236cacac782bf991b262efb340. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZNWZ2545239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9efea1db727c8e4141307883668132b3667989a8d637006087d812f6676c50. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTAT2556371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802d97095a43ef1c3001540dd3939a5fe84647a1d071a4a42dd7e86f8b58cd8d. 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/QZTAU2557554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971a2c3f1098afce2e3c0b45bbfa4840c278867954ae996fb752154755a7cf41. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTBD2518056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9102a06039abcb86bbf0c192e83d1a8115e09d0630a76ed15399be1eb3319d. 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/QZTB72555302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce4cd846971609fc3d3b0ec14dafa4ab0981b3e69bb44ca1f00112dde9e1f94. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTB72557509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb20679e9b01588d2aefa25e42ad8f83f565de98915fc7fba2901e49fd67e3b5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTB72557548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba0daf60cbae47da3dd9d25d2f02a6bc619e69cc5ec66744550df23be3c82a1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFR2523211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8f77731936245c241d0f2523fde4be89698906043f13b5006ac6099bd3c209. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZWFR2523212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217f3b67a4fb30537984758fbe71eb57a732b092e1a39d25715abec1fed5f492. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZWFR2523213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa468839f9f0e3fb016f26474a146facb3a2dba209d0aff7972fa729a5e854a94. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZWFR2523214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45482a9d4b3e19b6473dc01fe1fbd4b57da1496d6a7ed445c34842053529313. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFR2523215.