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 0x922f5f998192e8daa4319727894f21c5a484d431656c83cec47146e40d54251d. 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/fffc813c-08ac-4910-9fe0-7fa18b8b8746.json and https://artists.proofprofile.net/proofs/artist/fffc813c-08ac-4910-9fe0-7fa18b8b8746.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 0x6c2f7f459efd681ac34d4e9c99b9005626681e9dea071a4096fe9ab374dc6095. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:19Z), 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/CH7812049539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb302bbdc28b5a79370ab2d08a5a2250d662b62e7256c3fdad62c648dc7bed729. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/CH7812049540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae4d6bb63be62b58c7eabacb4118d07534d00eee6cd21550e32bad87de46ba6. 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/CH7812049542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adbb804c1c6083999e9fed46e749d13bacb7ce74b547918a5eb8b96f41a81b0. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/CH7812049244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab520575f6c23eba1c071ef7d9a537662e6d2c6d113430b31d7583979484fbde. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:40:51Z), 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/CH7812049471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11b7c7dd5878bdf8596f231e91a6973bd3b85deccf20a44ec6817eee0d3e358. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/CH7812049472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19203ba105168347b2cd1bb8d6ff0b31180acde64aea96f0c02ab2f2eb09781. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH7812049229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d120b497778cdb256ef959c7bd9963661ffc701cce017030b377fb60bdcf97. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:32Z), 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/CH7812049232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987859d1f27c77fec6c682cbfa1d72fb64b170ed9c34ee2dd2e15f88e43971cb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7812184140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c163ce6cdcb54f51aeaf7a3263e68f307d601f391c856b9d1931fb49e0c1e49. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:51:21Z), 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/CH7812184141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d03e2a214f0894b5a060e3c842d8ab8dba4d84c2737acd246eb9b588b05fa19. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH7812189281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9603ece24538f49ed4d39381b7e4e7ee3f451a4fad82a9b196516e05ee7552fa. 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/CH7812197973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e094b5f7fb598baa6e18569571b3a6503af816c0b55bcd4fd34e3d8d5a1cece. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:31Z), 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/CH7812197975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dfd8bb2e4fdb95531a550b1a2ba5947a51aa322b2e91bb171b11df59e33a22. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CH7812197978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb702cf6ce3c504275b083838fbad5660e2ae7de49f3046ecd8eac7d9a218901. 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/CH7812350729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80309fe7440051359316edb0fe4a7950357f8c7ebb464e8ceb0eb9ecf1cfa113. 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/CH7812350731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef445fac33ba53b286f8292af9c4b7853d24492c62074052050e8b8a992f756. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH7812350736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7991d2d931a67bc0267bb86181f9cd9488218d79d85431f620a647e24744977d. 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/CH2181500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24949df94e57d2eda85cdc73a15abf755706e9ad10ab19d467fc5c81c9f67e24. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CH2181700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9935b476f031082b5aaa0945d695577eee51a26fe93315839de3e069d4f7fed3. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CH7811926441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e679b32941423daa6b5b12be6e15a5670e3562ef99ba26bf2c9084fed5a281. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH7812063522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de0cac42df3a42c7cabb6d87f66fb256288801692ec518ecc53a648ba541fb1. 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/CH7812349801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed13fff12a5b2a47f05aff9338ceae996cf8d3bb0488c87469d1fcdca299095. 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/CH7812347826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d4a8d3ca8acc22a9124f1b45db2d73bed28d1328da2ceac033cd603966f23c. 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/CH7812349800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d44a67a1e7184e40a0b9d4990c6ea8ee60d8da189afe205bef6f9689cbe508. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CH7812349802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113d80eea74da90d2e70de4899358942c824f4d3ddcbbc15af30651c4e164768. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CH7812349803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dcdefce1a31485614f4a192ce9e9b9b2cc347709709904ba17ad4d7616b084. 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/CH7812349805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb612b6b390129c202a1316157c1a092e98a4ce12f9fe8ae7997192c672d11488. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH7812349806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dcdefce1a31485614f4a192ce9e9b9b2cc347709709904ba17ad4d7616b084. 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/CH7812349805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebedce33a43611c625003ee4d5a47af0aeb91721f847d7519b15fe950f52b33c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH7812529218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280de333aebacc7ae810c61f3d1f27af4418d70527cc1c637645ab8d04040a95. 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/CH6541746922.