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 0x2807f3170a63b048f51b1481bbbf7d8509de959f42f0ea33512c9b0dfe71ef5a. 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/6a3595d3-15b4-4ce7-a17c-c4efb782d8f3.json and https://artists.proofprofile.net/proofs/artist/6a3595d3-15b4-4ce7-a17c-c4efb782d8f3.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 0x61b113bdf94afafb69e6a51fffd082a2ae0e849eae1a8d0c89afd2284ca77409. 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/QZMEM2269655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c42b49f9fd5a0bb11f957bfac5c1fd1846efd619b83d3fe0a463274dd5e71f4. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZNWW2243065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3564f3404552306463925e20b79ce5a7393b129dbfd9c4aa129891be90ca2299. 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/QZFZ62350627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53de3c6a56f9aa5b249aead36c451af0c8632a732a6edbc511173710dcc47485. 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/QZHN52333896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0077343149bebe79224497386264a3e1ed762c28b791ff2d26e2dcef11191f13. 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/QZK6G2344386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde955fc973e485047f57250f39b7854b35075430ae2901636bcc935c8caf5b5d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:23Z), 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/QZK6Q2401331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfaef3dc6818d9e039fa63b768b0406e1e9a96de460caef8d2e53d349d36aae. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZK6Q2401332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cfe7aa5a5aa3ef564cd15dc30c70ff7ed52938945662849270a3f5010bd817. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNWY2483704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288f02518e209830feee6a473e4e9ccba7b699bbaae318ecddd83c615abd3b95. 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/QZNWY2483705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf932cc7a169234d7cedffaf7ad04262a649752544f32b0dc881a8e01634a98c2. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTAY2452023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9353ff6e877024e78f3b95718cb1f211eb203f957756045867955a95e4ac6b72. 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/QZTBC2495328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e4549b6419c686254217f10bb034a4e66408b262db5d550c94f4808ba649c2. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTBC2495329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974fa7f0db1eb937ef08811dfb42bf9a7b67273a0090f0907df1449fb4fa8490. 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/QZWFF2462885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0d5fdcc46841e68417691f234d55235611098afa1d3b6de1d9a076fe2dd9f3. 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/QZWFQ2456344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760a5d888ebb23c08947a37b2aa57e963c39184719e36af0f055be2aa0b4276a. 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/QZWFQ2456345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26629e3abc827f16ad1a9856762ca9f83cf2257966bbe171d9d2baa06f337aec. 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/QZZ7M2419315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac5f44a8e23868c3abbdf104357cc02c574b26f979c6a7139ca7bcf67a311f7. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZZ7M2419317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe9b6d7be41db4fe33ad4b3b5c83da42ace568298d135642e0978d024b64583. 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/QZZ7M2419318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11541aa43563394b9fa2780e9ee21f5414228205500b9bb53401db2656950f55. 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/QT3EX2515860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1ec6b17597d857385bbc0ede2e20b274209bb42f1d602010de6708dfeb6910. 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/QZTB52360611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dde99d520e46aec07a6c62df424fe5b5a36efb085b4d843bd1342ce1e09846. 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/QZTB52360612.