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 0x2c71ecedcdfaa1ecb875c932c94179063f37a8a583ed672e60762e07385853de. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a51f922-05d6-49fe-a28f-44a5e9ac6316.json and https://artists.proofprofile.net/proofs/artist/1a51f922-05d6-49fe-a28f-44a5e9ac6316.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 0xd505c8056b34c46c2f98ab6fb37fadb751807a72abaedfd7ddd13a9bfc4cc51f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JMA272008140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf50e461d4a5ec046046988b97bbe8c61065945d8f34212d14192b7f68c4fe06. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFE2004276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d715c62b972a75cac2a9d27b02e69dd39281324de0a642eb25ee0f0abff884. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFE2021917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f23bdd1396523c46fabf64d47f2c5396a514c5c77e86b853483cf69008e359. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFE2021927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ed9bdabbc1aa382c3ee1f44f9adde5ec717a04d804c68c031307fd4dd9ed13. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFE2021945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3169926f3e131a214b5210d768baaf527c95cdfd75391befd979b0c58b2a354. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAFE2006368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1878cca7d13d9da6e409ad05dc92d62e081a20c2959c5b7996d974856b46f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFE2006324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037dd19e32539d34ec9f2d6d8b5292268b36a57f0175260c5cd0100b2dcd1311. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAFE2022477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9eef0d0a4553a2293b6aa4d81c43642368e0f2fce5a89243a3818ab5df2747. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAFE2021904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a019243b13461211c151967af0b8e19b836c60e3165db0479c73fa643c12fb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAFE2008792.
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 0x5ef08cfcf43e40e984c12942170cb627db086e589f79ca22520b8749b6e5705d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JMA271801279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90655f0b8c2c2c7b14f0bf111b7cdd3ef251d744eae28b258997ba3c27f5a746. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/JMA271801280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07817b53ac02ce2f71e53e08c4fd25031b341e863a4d22cf77a3f6a765d98c7a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPYN2102871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf9a23aa437b327200cf67c9724f45fd1f6fc4a30c74a16534443832fc28a0f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPYN2102873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfa680480e6b48535f7786013bcceb51591d91d13e231620bafbafab6e9abf4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPYN2102876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb8e5738ca761acd7ba1a0d87e92090f6bee1296a6ed8dbf4e2ad272e0ab265. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPYN2102877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe259316d4bdf25f967f8848f034feefb205bd866c29b5508efbaf170663eda62. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPYN2102881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce5169194b02ecba7557d96f7ba2152a7a54f9eb7367389733fe824a2551917. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPYN2102882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d4da1426625d58c9c02a732f96132107880b4c702068c8f43a4d1a492fad20. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPYN2102885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d206f0d57c343393795487dc62d5924d2a64ac29d44ff7793351a4d49b03bf. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZPYN2102875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cea3b72ae330aadfd661032c72ee179bf1ece3b085c97225deed84a0a10164. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZPYN2102878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd03c976101973d95ccbb1e94a89f2c141ba8777601298924987cba0cbc48ebd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JMA272002180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07667d06cadfe72534de0296f5cfa61c891a2b57b426deed864a9093c6ffe577. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JMA272002182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf535b4de268c81b4a85b7f19161638298fe2938f01624c64b5973d6d8857862. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JMA272002186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb488c1c8b958edf04b6cc5a0bc96cdb8a0ea2e0f9da750564e5f1944519f59e2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JMA272002188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764022fcf0d01bbbff4fa0f0ec1592dc3ca802f3527f65aee3eea53b6dd7b7d0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JMA272002183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178c939133abb3e3d1db7f4b59b41cbf45c1ce0bd2950162f0702201cd14d636. 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/QZPYN2564450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c1ca09ee3f6ed496a32534da427fc3c2c81662327a8604e65af4a1b3dde3ef. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZPYN2564452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a972f1499c489f8bc0f84bd392d583acecae60f393837fe010cb0c9ca58ee22. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZPYN2564453.