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 0x84cf2fc19d4c14a3d89ff59c1591717e57c9508cc6eb02e719eb7a070010089f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6273f96-5c81-4f4e-a68d-c004f1a76ac5.json and https://artists.proofprofile.net/proofs/artist/a6273f96-5c81-4f4e-a68d-c004f1a76ac5.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 0x8828a3272b1547c7b0c9d9329bd7411421a6fce4a42d1577e05a76ae522d6209. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:08:33Z), 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/QZDA42225368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d96dc0afe94e44aaa28bdea402ce7e3b399f730f74aa365c7465bd66bfe0858. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FR10S1993988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65357fd3fe70274616edc439a816cdb016976ec763b312221f69125a2b935b62. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZDA82242264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2347d20b1be7e976b372eac2f01e3f3a4865a127b9b116f18eebce45ad119dc. 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/QZFZ72298661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dda6136a8ef1c620a461303bb8a24e1e6613f97a61d06b732b32d990d1513b. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:46:17Z), 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/QZMEP2217333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538fb0ba2221ef3ec4171174282972556ed284d167ab7326e5637bf5e5ebc612. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:37:40Z), 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/QZMEP2217334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5f70f3b34a03bda74070a6d813d556f43940c8e382f5270ff3cd381c15c936. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZMEP2217337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037a6d314aacde73d8a54146f4a16c1f1d8e7231de336ed2fb417af74a626e45. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:51:05Z), 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/QZMEP2217339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff61809b92407c46e322aedb513a4cdc0a088509efae98e35cf326267632896. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:14:29Z), 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/QZDA82340282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3875016b6183578d45b8c130278dd80a8a451119c51f1036ac561c8fe6de4c. 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/QZWFN2354672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa7709fff9ee509ad908184a3c9b2e0f411dbd0e8ad49ea6003a3e491902552. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWFN2354673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d31caab97c19d6c630279493f843938508f37fba4401caf9bc0a51e88c6beb3. 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/QZFYZ2428772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe0f7c32a3b36c466f38fb4f81359e02a986f0976c94e1f76a1a950e40b9968. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIF2422641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7e26053201da21ada3d4926bf2252f0fd4302843f20491903fe7d74e288373. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:44:49Z), 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/QZTAY2456183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7b85099a205a6b33ff6f5883f14ece3af9247cc1d278476e7ce3ee131f2ebb. 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/QZZ7K2489210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb3502dd99f279c1f281d410e6880f0e91b90b19b15f8da29f3034eb75d7223. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7U2403909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a172d3f302aff6ccdbacb6570810b9379bf1031664fc95a858064e14926817. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBC2553007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f88685a280d504fffcf0779b2a3bf96b80f99f9cd869c0dfda5ec5cf160c376. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBC2553008.