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 0xa24cc817464bf92a7827cb61a1cfb1daf52a6161aea16abd835bf15b81e9a6a9. 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/4d8baf3d-f036-4bba-8175-3d8bd0051dbf.json and https://artists.proofprofile.net/proofs/artist/4d8baf3d-f036-4bba-8175-3d8bd0051dbf.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 0xdc327887db30e0388643de02edc8d0b0baf787170501bc8f87d6a6d2e4ca21f9. 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/NLDP10800288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fd9a8896ce0b01ec0f632802b428ec89d9e953ca3dfb4909de52e194926871. 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/NLDP10800281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c781f4932b3b534a9d0ea64e373c28f1662b4ef98dbbdf37912285044a8c4d. 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/NLDP10800291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2fdba1dce945d37c822cf6982895a80ee32ac6a2cd3cb740bb831a8624e27c. 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/NLDP10800292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed76253803c48c5d3412486dc024ecce8f3ab9cd32d2a98a2cee065ef9c0cac1. 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/NLDP10800293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4ed08174a95124b4885a593ac589b6f057c54e6dfa13812c83a01949cc5ddc. 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/NLDP10800294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c3014715e730fc1b57fafcc58a33c8387556648ab5e37450f61899a5bbdf03. 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/NLDP10800296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673839e50f4af8cb2e1c57189b503c4b216d2c3911d30263022698a23512973. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLDP10800287.
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 0x6a157547d27f373103f27c99ad047fea0af9196cebb2663963dad6499b37dbed. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLDP10800289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c80c086b45a6251b884fac5593636e6b0dd7e0df34fc7af42b3e34f08f21168. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/NLDP10800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fbe426d0355653ba1a9cd5aa28e974aeeb9eb09aff30dd3399fac4eca0413e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZHN42056523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fe17e4184724b31ca7a2bd0310691c63a0cae308d79c8ed4673218c88efcfa. 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/QZHN61960577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa638123f55426c1c1a2a80c41f0242aa2dda8dd6ac5beaa1291acbac981863db. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHN92020345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb5519b00b8da2e5fe06421f5cba066b588cc0e84d1abd32f9116e275931c6f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLDP10800297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3207bcb3a068aa5a9f55bc961ca8d803dcc519cc42f1d91efab15e006bb0e2ce. 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/QZWFH2326252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4143c22efe128967fa8736bcb871ca44ec8d5e6370c88ca076bb9f9cc57aa8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:15Z), 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/QZWFP2470718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80af51958b159391de6c0b25f08d2e920ddf8cecdf3dc89d32eeb460ffbb206c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:09:20Z), 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/USCGJ1794764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371bffa517b72dfd91487d68bc515e1f8caf6af56e21dc2f592ecafd7024f9d8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGJ1794770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4e56f32e0716e3f91d98f3d3652e000b9502dc7ceac3a4014e69565e00a85a. 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/USL4Q1992233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60798c7e13cf3e8926c4af8210b90ca43f1355e07c6f9777398faf9f55dc4220. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7L2487875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeec49bee303ba77dea9eae4182c1b6671ad471a6256f95e2c9a25a81d16dbf. 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/QT3EZ2438172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29fd8af5b9b9053580542f4c7b06ccd8be0bf0d9cbab546e1f72ee2919c9bb9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT3EZ2438174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc428aec6133832da7d47ad77bba7b42d1f8cb6424f2c2b660a6490c84751f9e3. 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/QT3EZ2438176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4143c22efe128967fa8736bcb871ca44ec8d5e6370c88ca076bb9f9cc57aa8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZWFP2470718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d658d63982ee881ff6a0f178bb91bd8d59e075ffa10936d0c3a22d2301b457. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMER2546770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb76d2b1dd9cacbe8cdb0ba30a22416178c60ae5f269a176ab753937b9a346f. 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/QZWFH2328496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c24b4d1e368a55d1875b4c1c1207104f82b49938062a46fdd70891a4454324. 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/QZWFH2328501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c502d149478de08f6cba5add3c0be517205628bd9dbbddcfba699b1f743d71c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFH2328513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff89ca78e685851fb7343789cc196737108bf10702756e13ca5e84b5f00ded1. 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/QZWFH2328561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb3c6d34d5985bd655f5a4c4b16cf2af8bbcbe173608424464b14b92705fe4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:27:06Z), 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/QZWFH2328497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe828a00b773e43d8aacc1a5eee3d62d294de49fde74e6bf0d96f05bf0e6a17d5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZWFH2328495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b601bf5ed48cb6bf4bf1e5150d66183d20a7707c8f2296b7bf41652f209981e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZWFH2328574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dc0f49036d2f109b8f7b5bd0efec05a6ac6c10ed797bb4654ebd5bdb514970. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZWFH2328498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7471c0558695ece189065d792ecdebbd497f3ffbfebb7f8d62f58f060beac49. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZWFH2328499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe3e1798bd2182d29f79f1981304b69e9e368d2c02f9733980942ad09f59d85. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZWFH2328506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6378e94595dfd2ec95a0f375f38818007be4448bef4776283c279b3f44353a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZWFH2328508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7173d582426c768c324fe19fe115a96073b0ca849bbf18a7019287d90b4b3a50. 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/QZWFH2328523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc6d5064f41247d7ae6fca88814db34ed87ee94445d1b3a04db51f9a0485003. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZWFH2328575.