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 0x93141b78c0b634d1d4ad9e47a5f38cb26bf938a563f89b2097ac59f6a76d2cca. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a3941a2-ec59-40d6-9183-4c3d0b3d394d.json and https://artists.proofprofile.net/proofs/artist/2a3941a2-ec59-40d6-9183-4c3d0b3d394d.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 0xb8abf0e818355efaf2ec073ec370b443cf288d5209b61e80d70ad5e0c5f8ab35. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWFF2588241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5429301327126855ad4503d2551dc910aa9847a88656517a6942582f771094d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFF2563148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3752d4fc58df1032ffb091c71f2989e8ba8a503c313d0377c72fb5476bd34b1. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZWFF2547218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec49fbdc30726711e539b2b4b3549e2391f94c33673b759926f28a349438f3f. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZWFF2588252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1628a690909ce3ee3a6c139274b9380476198c998e81b80f601c4986370ec768. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFF2586576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f28c1f4ac3eed9c223f11e99a9c137e4746217eb317f88e17225f887acd9b4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFF2563136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca16034c76ae979c58504d4a2f1dbb54cc3b34dcf4be536305d3d25a11b8edcf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFF2567593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3678413eaa3d14e3b807ed3f3974a62da441dbca0601bb62f2ebd8f74ac5751b. 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/QZWFF2588265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4555bc23c1821e9c4394cb16c5dd179cb57469aeeb5ac11ead9dec7ae5ad94b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFF2563218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5261ed0c7cd4425a329f482fd0b0e67b459260ae9480e04744a0ba26e87be72c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWFF2551349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c4b7d186e1478e4a6d69e6ee1d3e9eac0bf7d04f64c2feb86f734cbac5969e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFF2557903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1806d3f0f2b071d2edc3258b9ee422320aad0048b0e68d3e955eb8e16800d2bb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFF2548845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0bdefeda6e4d1d1db0666da60912c7a8289bdcc77e4ac449c1e8c0bbd060d0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFF2555986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd236cf0698a3c7d33200efd96cf56af6cf6b44a6711496400a15daa60594758d. 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/QZWFG2521690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf352af8c8c17ac84ce443f356b7de8b6af9a949c726911a0656d768db529255d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFG2512444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4497a82303332f63e57ec45afca4ca156a6811fe5e5c0757adcf8e5c9930b90. 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/QZWFG2510349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac82ad37316de7945fd316587a0b1c65478d7b604a1c1eb84ae5cfa0e2bc3ff6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZWFG2521688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d838b1d67343380d87a797516361ac923ec36719181b31e44320e0199d895ba. 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/QZWFG2512445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835efa715038dd253ceb7d3110a1508fa157b1ec1bc069da6e754da2b5486875. 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/QZWFG2567531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e21a2c673a694ca08c55b124782877ac9e2e3f5f9679983daf75052b02f7363. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZWFG2570582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7202a4dab52383f5374e52a00a64b50cb1037694bac510ea2523e825bfa1ddf1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZWFG2567500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe2340f05cb2b53ffc1511ef997984100bab31dbc7f97d28b858aa793e4d843. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZWFG2570591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5ed7a0afd1b5bae0a3ff1f304a3a692e3f771f726e15b9a6173d5ca176cad1. 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/QZWFG2570566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b2be3680ac1398e9c5cd4859e47894650b020f55d850a3767297614d2d4839. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFH2530383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141ab56789e4e25f254c083b45cfdb51d49cd2aa77c330eedabcc8ac00b0be9e. 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/QZWFG2597932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fef8b4c0f8740c8cdb6498887c0f574049bc4181524ef711248fffd13f4f28d. 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/QZWFG2597952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe979a23500d25ef737dfa3eb0e1608c11277df22df35a2823782feb0532620e4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZWFG2595835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b05ae86c7e73c70e4ad1823a7804ac1ac28f7e55821011c928a710d525c0e7. 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/QZWFG2597935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61630674b9ab5fbb6931d0c8f9dd80b4224724b76f0d28b347391fadf3b50efa. 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/QZWFH2506274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8342a342ca53bdf902f5fe417343a75a2b7311b0a124fcefc527b874bd6085d1. 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/QZWFH2528538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9a9355c529a79576af30bf9f41caba2389ea32257ff1eb679cd75ccfe0c14a. 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/QZWFH2541335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cf4e01dc4321085744d17a6c94ec213b5577159443272cf32a1472a70eef43. 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/QZWFH2577158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2127483c4459aee6cf6b958e760fd3968452adff5c8f7e77d42e6e0e3381208d. 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/QZWFH2530387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc73e5ca342fa632fd8d4f0e1a7d1792dbd4ec86d7f372355326c4db4b21ef8. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZWFH2577191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22d5170fa6c189989854fe8a6226837b0d847c104c4289d60fca01097340f74. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZWFH2571034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539b560b626a195fdb65ada833927ab87100492cec1e94129708f2fb58b9e9dd. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZWFH2573620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760a6fde9367c2c1522e63e8e0982c05efea13b350f116d28e7c34930c9cb4e3. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZWFH2590573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd819791644a2a56c9dbfa4a5ae9d3c3e798ede9c26f561c3ae154902eaf4fcc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFH2588650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd66d1c1af32d2b933b93bb8bba6ed721ec723ce00580b0cc1cb21b69985b03d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWFH2590624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0cc1c76f4478ba633044e90571f4ae15935d4ef35fa0289333bd563239710c. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/QZWFH2590558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5884fba5d66573415acbe8518ee7f0f05ae4550ed6555407a63a608a59f362. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZWFH2590587.