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 0x8d7d7206942d8661eecc6f352b69d94b33e83b560f88e708e6414139664fa9ca. 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/91c42935-c4b2-400c-af65-306f64f0f614.json and https://artists.proofprofile.net/proofs/artist/91c42935-c4b2-400c-af65-306f64f0f614.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 0x3e86c35b915d77b10e385ef1ad42d6e9bd74eacb7a85e0c935d9adea0dbaa3c9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DEA451208310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149956c866a40ab53996f1291be4386be4233fa9c1703d9894491a2d3f28c1e0. 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/DEA451208330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085649cfc89c3a2457925183b0d6ee09ca7cd0e0c4475e874a0b3f8f284a4170. 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/DEA451208410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac876984392718e118cf9c293ac6736c044c303d8122e179e671c52c57a1313. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/DEA451208540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8902007864a79b925274da02b43011ab4abdef1bdb0360f4dd95caa5beaee054. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEA451208550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9668aab060c43adf810da15e329e72d2c84eec73093c9414c8d0413439d0cf89. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEA451208580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0661054674806777b9f2538fad5389d5b96eaf7f01a846e478ec41580b86536. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEA451208610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f21e2ddbccc3535a7ae60046b3548e3fa4147d618977767e4374510c7b9c5a. 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/DEA451208640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d23eb8e2074c3c53d6d53111be957ed5a6516f7b189227026f466a72e6e1607. 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/DEA451400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cddc2a4d66ec9e17d790c6deae05e40e1e678735c12d9366f0bcc8ce9d2ddb5. 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/DEA451400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde038be3a88c94fc51a632689a32856414fc098dd0b8ad605bda4dcfdb751fd. 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/DEA451400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeae5ac38ffb1cacdf8fab15771e552d8778b7bb627fe85ff859af3e52cfa751. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEA451400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de08fddf4f1a825f37b56eca8264e0a6b2bb2bf83e4b6445f4330cc2f30b0ee. 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/DEA451400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea65878a27a50171e69a43b3f521923309021fbdf050586facba9ee5856eb997. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEA451400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d7801ac93ef5dc564405924973967c0fedd9a27d3209003824a73efd6939aa. 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/DEA451400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e68515a204466a88e9aa3bcb5b4e6ce2f0dd8a05aa4f834b1b8f913cdf99b2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZ901502134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b385cda5901d9b2426cde65a3e94d378de5fe0733b3c075efc249da9af56bff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEZ901502135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914068044cc8c2303cf100107e6ed6a280420bb8b301a21501e21f3277858698. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DEZ901502137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0fa2cf04de1ae833c5d3b4ae4e13d588227647c3bb7dde86b43b750fa0afba. 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/DEZ901502140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55a5621b31c15a40d00d6a5ba16dc154f73c7be1dd99d4e5a4d57860854aed7. 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/DEZ901502141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07db2b32d37d6983eae8d53d475310b4448f9efe4d1496773187311459ec733f. 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/DEZ901502142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696ac99d801f838f7bb93fbc144f4c3c6473055f5736929f07eeb2825e23d75e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DEZ901502145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aea71538508a589845bf2fa8cbba7fc20916b01bb043d19f8beefce26760c99. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEZ901502146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7a2398045323a006d9932bbf9a01046b98bc605082760fddbf18888bb83cd1. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/DEZ901601146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026f8607ad8156c73955646dcfff9336e4e6b411a9388e374434137378707580. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEZ901700766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494808c9decaafbd1cd2c2cbc13bfee08c23266d2ada311019a6652b7260ab61. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEZ901700781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572433aacaf40be9ec3ad93edc3263d86455ad53e591e2ef0b0d4fa5c547e729. 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/DES371900243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5208464e3cd1c46f2f9e7be2fcdb0a60e635cf2f7e98e017e42c552729fa7a96. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DES371900236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd974b8fc5f6ffb4416cadc7d770c084e19f912da95d33d1edc7914c79a85e4. 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/DES371900237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0cdc1a27dab4ecf22844e714acbf663898b8c0d9919e35d028b235994f3276. 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/DES371900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5015e04ec191b7c93aa08f445f6d0f89762b1059a29ada194edc6ab56940861. 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/DEPI82458463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08afdff101eff278faf55385513477884c29802455e533ec6e753458f9357d4a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DES372200758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5054c586123a13b9264c6f7bb6d07745f8d6856adf4f6d45886c2095410dd9. 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/DES372200759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3fe76331af8e3ad26d1f766bbf5097ce90a5d2accb53365b7a12e5ef6b92d4. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/DES372200761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599df09fdf056a480876105e30b18b860b9ca264606086a33feed23f6a0b660e. 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/DES372200765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c61c41ef6ebce063c85188eca418f565298da6d5cdfa7b1cd7b59509167f59c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DES372200766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff1dc5e21fb30cd751eb0a6f56a8405352350f2cd26f72da3b82817058b42fd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DES372200769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6798d24c24de01ca596a3eb80d7b417d82fadaa64901d86b120786e32dc96f. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DES372200770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525b8fdc666a76a8bd711e75f3cb9d07fe01ef5731c27803f26f2e392a8b30d5. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/DES372200771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18f72093fa5aadf6fbf2483f2b397d178c63bf7af6de415b6e94e6ad354898a. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/DEPI82457629.