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 0x9532fdad09ecedb282595a5fe34998dd67344fcbd26ee4f10054d2a17967ce9b. 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/76bfa609-4b18-4fca-80c8-2dee8ca21357.json and https://artists.proofprofile.net/proofs/artist/76bfa609-4b18-4fca-80c8-2dee8ca21357.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 0x65a7dd7bda9a950d2493c31a411d89a85c3faec8c625d26e87f2f077033a1a58. 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/USA2P2109071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d5168dc80cd612de5165bac4a2a8143404eb64969a0a57dc657c4b83004164. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USA2P2140335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e9c638f3ade8a421be33345ff37eaa046a2c13c2a8e51ac14e8ad748c0d2f5. 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/USA2P2359102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b45e03a3f94e2d29818a7306151cfb8c998e5bf40d12632f17a0bb71452a7c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:38Z), 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/USA2P2359103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182b77c508ce8fc59d6be1a76ed94a7f428334df9a3e452f11ff8e116af0cd00. 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/USA2P2465979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35678a0c4fd7a267853af2ab0ce1d73dafb2f449e4aeec6347de4a82e09dbc55. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USA2P2465980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3327bdf8c4dfc39075fbabb3ed1304226b26063769f186cc22f41d432807a3. 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/USA2P2465981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79bc690d82c95fb5607a2477d874b25e320fbb59de98ea8932d6b54536e1235. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA2P2465977.
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 0xdc2b2f960a5f131b23344051833cb6b2b0f94a02b977129111f4e4d8e71084b2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2474999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8658051763e8944ce719f3d0f9adc70d1521806234093a0829eb113a1e43e95. 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/USA2P2475000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629cf932a7a322f74267c1cac6d3dee6a05025df732ac54c75b8e50bbc4de50f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA2P2475001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ddf4a52728c131ebabab6ca5b53e22323ad7e262ec6ae09c7571b9ea380e82. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2475002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e495bf8e2347efa2d6fb9ff5974d9f899b751a9231d266ff128873f269efd80. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2475004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44199a9e3f2358eec44b90a3ad2ebbb4845cda6a4edc7c39489a422b544365a7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2475005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec255b2cd95abdd89658c94c64ca5666ec18bf2db6c12249dbccecc58736df4a. 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/USA2P2475006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5ab1953012160b6fae8f61aeb8ab3d739074a58d69e1d8f8bd15287376b895. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USA2P2475003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eabfecc6beeed3da66a94a500a4de127d08733ae2f91fb181c355773ddf833. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA2P2535020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfac0e3e86cee8d0f4f251dee965a61a12e96d482e42befc3e63410c9c5a586. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2502590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd960c52cd5126c949f743cc037a8c0584256a2e7f04cd60560cdebfa41b29269. 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/USA2P2502592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b2c4b3c780748c5f8eaec7a7b26235e74c5a58bccb76f7bd675d2af07b0c69. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USA2P2502594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa949cc237147147059d705496cf100c81bf368dc6e97444c66adebb3ad7b551c. 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/USA2P2502595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25a504b6480119a663a10c8dd733923289f95196fcb44312d3b81de6e37961f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2475236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc7a98561e44fcd3adb5f6559f0df2414c56cb89fcb7f0e5b8623b780c3a66e. 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/USA2P2475239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e584ef4595d2c6eac096259c8108da3cd3e29af09e565f83d1dd8df816ae3f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2475240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee50b0e1287c32c3932d85955ff8045f28f46bafb29640672d7622d785ca3a3d. 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/USA2P2475242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240a30e9d715a6c0487f91c79cc9caaf1c60bcf09789256a7a6b09323d9e873a. 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/USA2P2475244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48006faccc57ece802cb6385fe9ed53d000213b8c705609b1e09bfa3289e9aa9. 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/USA2P1939242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb0516fc170694de5fa0e9c266b9bae4741fa85227087900e5857dbd646e43f. 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/USA2P1939243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc686b19406faeb34d24566147777a3c04bd68ec862d80ed95ab1feb9efdee440. 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/USA2P1939249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9d0bae2eb9f902d8828586fbfe2a660fca9d245baf1a24e6931fb3795b771e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USA2P2043983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd016b8134e52926e49499fc5bc18ba7074fd1adeb4009076fe9352aac7567ee. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USA2P2043985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b068f0a34b5c7dbfb33417b9c13b137d361bb7cd1091fc5687ab0f7e64eaa29. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2P1939247.