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 0x58d53e9b67690e3c58c04dfc17a2c1d836410eeb87a25c27a32d67de4c83271b. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95c32568-1cef-487e-90fd-05035b79a48b.json and https://artists.proofprofile.net/proofs/artist/95c32568-1cef-487e-90fd-05035b79a48b.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 0x9c2a62d989e7706ca8b93bbe4c392aa2ff9d6bb1ab4be51617bbc98dd9eada0d. 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/QZGLM2446523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdd015e4c4add02ce5dd975c1e37419e1db0a4e45f65c1a8773aae543503797. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92558364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105d17ef1acd2314209f8a6d7ba16237f1de59a083d902202d9832cd17d2027f. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/GX3Q92563386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b734eabb26afc03286daf4bcef5df572ff277a7df6f44509a7f506e9b1b13b1. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GX3Q92565107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a02249d60fdf59508d76ee46c00f2726e293be091380d132facae935466e713. 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/QZTB32581070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c69ef5962cb10f8b41f9dbd4122bbb9b9ccec601650a33a65f8b1a0e284322. 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/QZTB62525854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1019ea4ab2bf539b487a00e417d7e0e17d5f1bf9c4a60f2f5f2a4081f92f09d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTB82554133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb7ab566679546599dd1fd422d8f878cd5dc8e3d8e3923fbc66d33ecc670320. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTB82554942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31ef06c7f95a2d28c54441283c67ab1d07e475786f426cad1fffd1cff8d70cf. 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/QZTB82554978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefae4643d2d01f4bf07cdae33deed23ca6e8e9974357cce914d7f061fe5c11b6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTB82565205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b69f70482b19ee9a1cf1d95140e44d48f859727436fd5433e028ba7a675ca7. 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/QZTB82566805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f3ab5701f41cdf637b9d532869d5b057c6a67c1bee71afa817c1cf89f6fc5. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GXH2J2529097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2466ce25dde34a047032acdee2c84ef904ae1bc607fea429f32d85e9232f57a0. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GXH2J2527610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc025611cc405e5639279e5607ccdc5316c70740759e7e374ef6aa943f1f67eb3. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GXH2J2535209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb5fb4baac4a52f930bd7bde2d4fcbb61de345ae900fb86c70b1ee6c59dafe1. 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/QZWFG2509806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf368ac128bb8d4bec00b83e82d2ba069c7593df2c723327a9a9f1e4fbdf9e74. 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/QZWFK2559554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa17762fa7c4575a84476be69ed81088a20383c79791b408f8123d1acf9d628. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFK2557944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19c3b27b9cfb9c16c46ff4f4c4b75de90a6758cb8de009ece3e3caff2b05f6a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZWFK2533089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d63e1cc21c21acc714ba51aefe5349ffaa5f19e5a73ab862ec3f7091f41ec93. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZWFL2511164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa674036b4dbed4d1f89292eb525f1a71a67e31c803160f90c323922b5a11fa29. 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/QZWFK2570794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bb53ecfae73200ea0b2ab2d156f717f228468fae20eb5738c85e5ab8ff4584. 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/QZWFK2570795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e8439e7a52a3f3448c5a47cd81d34ea054622502496a0faec446c130b5338d. 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/QZWFL2506421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d8b56daecc01dbc628c2cb69de02066e23b50091ccc8ec1887d61380d6932a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZWFL2504125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e16b4a15d031cfa7c9c45d1a0da40f42161269e88bae69eb7ae8d52f55ad34a. 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/GXHAF2513539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4832398f1ef31b3a3142abf969e7aac13ce0514a20fc3fa9206bfd036766d5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFP2534434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f33c4a3af176a3f4910943a2419070143541c9f31ae59c435f13d844c8185fd. 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/QZWFP2534411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4123751a071e06709f7043dd69396ed968a62111e1d74be707a7993da77c01. 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/GXHAF2535723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ec494a8be3429242f088b8ef08f9c8ab18705be73200f2d57f9c1406cd2b82. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZWFS2533266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5bcbc5dd0d464d4756bb1a9028f1eafbc862a5e2177d8bf0684408a250b32b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GXHAF2547194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264b56cfbd5103c2a996339600349ebc2b5ce8dea7812192f483b0e7d3065cb6. 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/GXHAF2568564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6905ad4184ab314b35412379fec6bc366a71660cf8afcb176c1c05ab74dc08e3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/GXHAF2582699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4d79b0cb863caa87590a8530c5e53ea406df574980c7b537fec3bb410698ad. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GXHG92552887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd13af87d515aea70e51750a3a854512bbf8953d30dd6e784929d9aadda4b2c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GXHG92552891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc4cabdd2c1e5a36fad2e8583de8fb4352b530b339b1cb8df2a257e67e7e4e2. 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/GXHND2550574.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242cdb2dd4fa5321c061c67551f7cbc46eb35438cc8e7add102995d910971ae7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GXHUT2527274.