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 0xdd56eab09e80f8439feaa6fad5da160f89e19969acc26f1066cc0c6e9b5bab0f. 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/80640f6a-e61a-4b37-a4b5-b632a88c12c9.json and https://artists.proofprofile.net/proofs/artist/80640f6a-e61a-4b37-a4b5-b632a88c12c9.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 0xea68a985a1b20672eba5d72ecb3276716f6e52eb8e3bd1f24be2005c2381bee2. 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/RUA1H1944866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0b9b857b985665ea654e45a4598dcae9891e65dfc39ffb057dc5bfb559ed7c. 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/QZGLM2001782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77183047296139e7f34b0bbd5db7b11700f458d64d12a8c89ee792ca9dfd9085. 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/UKEX32110736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d1115947d79ac1ed26a9bdf5a9e5524b232754d115f935ddf97ea1102c6033. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AEA0Q2132198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce166c3d5f81dd7732488560ea0666ba5a68c332478bdb6e6ebb38ebd5f2c741. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZNJW2164588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba57dcc33796d10619cc6f8a9996fe01312cff4f50bdd7eac5eb2f6757a811aa. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/FRX872231167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa849cf742be3318f95ef94b63a352dffdce958558f666f6a35a71cdb6a4f5a3f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AEA0Q1727885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53a05f887546a23033a1d75d67da214ff96f29701a41dcf8fa39349414c47b3. 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/UKEX32332491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8193677c5f8d5a47942ad8a6e1f9d15351a4d2fff19fa9d1303dc25e8f3504. 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/UKEX32339416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf110c20911526e2d0c7389ea73583c3de1a0522e9abac1df54072ac6a1420c43. 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/AEA2Z2482673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c150371ed214bb449ea0a59bfac99d72dffa0e9c9f1bf966add32a2afacf07. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AEA0Q2494499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5b29644e21a9cd39119b054ff86f766aa8599a51a77cb81d83d5ea9e6640eb. 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/AEA2Z2511700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848c6c2f3b27845c8f38b5d0dca015c60323c4d44e43cdcde5cf653681d49251. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UKEX32462531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d132ad9c846fedbe57278f3f91b61bc575bdccd19db37134f468ae59ef89b2. 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/UKEX32500733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902c06da5363ad9d88e9fdb01bef32b6a3b75f9e97a32a2cafa4c95187e3fbc6. 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/UKEX32500368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca6c6c58fe93e8a4cc1d90cde1663e677392cbd0288ac1196023b0cfca34dd9. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/UKEX32512509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5a2cb8b0e465e15b060d4daea0f911b30630ccd9381c8453e4aeef78c18c46. 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/AEA2W2503949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee3c0ea0c0c04780d9b0e19ff4e93b006a9cc9682578f2c901f66cb8ab77fc0. 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/UKEX32515686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d54c6b1c07294f032ee996d6cc6a0e9f5708f356c5492da4d81ef0f25ae435. 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/UKEX32520558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb402dd6b7e3e14fe3a167fb3c311cce8fa425738203e36b70949ee18c7aeb156. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/UKEX32512215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3915ab0a3913298c2a19a82504f5b72c6ba7e7ea7f3bec629b56158f9b484b5. 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/AEA2W2542681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e798ea8c1af631567da6a748b2fc7cbf4000ab3e92c06f66ebd5a1033166e95. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/AEA2Z2546274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132f740f32d38deaed99fbc3de67324d90cd19c21f65914562c0a77bd1a26a49. 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/UKEX32538935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe709d3cc88ddff7430a4786e04ba4ad24f4a7047384d6b05cb104a90f31a7306. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/AEA2W2584252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecc50936c1ff9c19561ebb59b1548c480c417b3b0d5492a4a77fc931c337ced. 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/AEA2Z2547105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eba0684014eaacd2755095c6c798eff329e3d3097aff468e5e0c70408e2102. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/AEA2Z2553902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b31799306d50c35085c4c15239d6f808cf3a39c0dce7b5c2056a213b0ad58c9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/AEA2W2597372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608dfb0464197f3d5ae5a2ed919fc8fa1fd6f69ecc52f785045e24e628f0378c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AEA2Z2561044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331cdaa1a27cd644f1aa608c09e9c6c73c3450a7142d4b8e88440e0e92e3352f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/AEA2M2501029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd28b0a62f45e56a3908eae6a41d07bb110abcd0cd232437f77c560db9716191. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKEX32547912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd1c1fc4545261da668c35f7cb3a6bbda8bb52dc24d147af8cbfad748c7fed. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AEA2M2515129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7271d7f58bc9b1c9687d3ccaaf34215426cc0d9b59a02c757d4aaf2582825b9. 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/UKEX32540075.