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 0xb7ee593cbec6f4a541a7e9920014cb0a57bede0cd8d9ea9ca4960fe13146de81. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e529f66-ed8c-4335-bfbf-e53f2536ddf0.json and https://artists.proofprofile.net/proofs/artist/7e529f66-ed8c-4335-bfbf-e53f2536ddf0.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 0xc85279167f6a73a651268ad36ba7a4c6a7303b51e2c8380e348d591b1fd425d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA4E31100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a069467a8170bcc15a0d07a485e5db981e707cee75f95991cfc6e17f3c4a17d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA4E31100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81299e95bde7bb9dd745c0a7aa93c0e9166920010d14074b1306e701079b30e4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA4E31100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff8781d00ddac716126d96f567f7b5511bf955769da6b92cafccfd5154d59ff. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA4E31100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca9620b93af661d90759dc4d6b2e6cba4b08f5066bbc30a53df4ba5bb16a1cd. 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/CA4E31100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed7092e7f5b98175e795f2d0c31003feb04a62e386d5c634810d812be42d110. 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/CA4E31100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45774e2f0b577d26ae389af6907abf98d852188a29e465bf534229f06f5b9df. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CA4E31100001.
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 0x6bfeffeb5b074278b51330aeaafbb426e8b823a86024f1130afe426a8e3bd0f3. 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/USL4Q0706569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa570702af63080afa3cd88429ad5faec676b4a6ac4799f5e03a37d978ff5df. 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/USL4Q0706570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b13145c9f65c973d1c10fd9a74e083caf017431f8ae473b24811904b5449c90. 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/USL4Q0706571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18c3a26201c17caa2c4107bda2b174e60aa4bcf4bc71aae6e3727f215bbb61f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:44:43Z), 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/USL4Q0706573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282c5da51554b48341dc475a6ae993012e1d02090d7993d98deb3e06914eb631. 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/USL4Q0706575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36df44406359f21e25f5e1d2a84b7b6efe38ab0065fd7ec0bc3abb476b84450. 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/USL4Q0706576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0177ef44cb097abd4c662032a2a7b28c20c61a1d59c2ad55f99f0f2768b3235. 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/USL4Q0706577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1278c622f38324d9456f69d1c0b34496c0dd36d291604ef552b4ec0ba6a5b06d. 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/USL4Q0706578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ebaf8c8a73b58377a549190e74aa6842828f76eeadde79fe4845b45d9aba15. 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/USL4Q0706579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf650b5e1263e1e5b2b967fbe2046ab0f95d832f3c9a6bf10c2323062b3ea4d1a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USL4Q0706572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cc67025da35b0a01f3f30de7347e3d315a2a0e56a8721440b593ece2d6b0e2. 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/USL4Q0706574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4241179f2d2c81638b35ceba0be0a856b5fc7238848ea003e60e059554e8f872. 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/USCGH0554491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96eec7237c4d38b35ff117ed5979a7b24fdcf527410de58c6d7376e9ea27888. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USCGH0554492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a21f9bd8fc73e1df47310694c3662a26f129e8fe924f48ab7ec399179db390. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USCGH0554493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf43b0bbd47a1f5eafd6b02fbbaafeb01a3d97ba0047a57cbbe24f97ef5e45fe. 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/USCGH0554496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39112e70ce34f409d37962e814495ab6baa7e53eb4841c0c013629ac32862d6a. 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/USCGH0554498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c9a3be236ea54021c628c21d6135fd22b993a1c87bcab1c301ab4940b7024. 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/USCGH0554501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b44ad45fba191ea2c21cc90e94b9d959206892316cd29120b8b475c6d925bf. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USCGH0554494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e37221bf3d47b807fe7c13514ef313de35c28c7adb003275e6051ed7ba2301. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USCGH0554495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b407aa6b84408247a1e37dc418b8faeb9f1931ccb908798c6a2683cb4f43d58. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USCGH0554497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1589e1206c5528b44a85cdb714431a9a31e8b76f9e67b55da8e6db6be5745a62. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCGH0554499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341267ce64bf7b420b85ad0c29fdce7641e02b6ef559b74106de188030c182a2. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USCGH0554500.