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 0xd498b6e908788508ad20e774c846e7936722ba0184eb13eb10955cd35bb18795. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/306f5cf7-2325-4fe2-a73d-68a04a15551a.json and https://artists.proofprofile.net/proofs/artist/306f5cf7-2325-4fe2-a73d-68a04a15551a.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 0xc1fd08249c7aa6d40198141a0130e6fad43b3d3b67cd17ba647199bc8a98aa68. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QT3F22487327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b647ff63f14993b389c666680aca357f120b7b0e48c2fbc2941eed92aa89d7a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT3F22487328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7485a8d5a81441be1aefec90d399a26ad76d7a3209491e43201f0cc604f580d. 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/QT3F22487330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b8bce78081529eb0375135b98621ae683a89d6325ba6ca3f46ef448a83d7ba. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYZ2564396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d751a0924f4e779298bd681a235c4b1a4650bd7e83ea194396c7116105f2d7. 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/QZFYZ2564397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b5d4d63ffe73ea3eea0267b3f3d79a790fb7ef4ecf50cb077b40ab985c2a3d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFYZ2564398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76434a28c7c7c7877931d1cce6853a2fe422608aa6f621fcffae58c5c4e560f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZFYZ2564399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7534d952d5a1f6b2ff71399d77c38c29e29691adc58019e7fcc02d3f1a55a0e5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYZ2564400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e84dec4b4aa369387dd8a4ef431d2a0356dd1a6f7f60fb0caa5718723f662e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYZ2564401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5649462b8d64753b7f89d7fec32bf719519afd6924ee1432bb6943347d16fe6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYZ2564402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63240be1298e2cb8214bee249f6f31eeb0920da7d6ea7a4f2c674dfd3c5a36ca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYZ2564404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff6362971e152007ad14dfa3135429944b045ef98fce9cfd21f7d2a24d7484b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYZ2564405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c2381c5cc9c9533c71325f85b704e9a45c57b4a433a239893be944804e7283. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYZ2564407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ce49c925866f4696607dd5e0abeeda935fe9db3c207333650a9a8c0b25c761. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:22Z), 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/QZFYZ2564408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a15984883c9d8f4ebd588911209ce127395aff3dfbb170767217b64905ff1d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:23:58Z), 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/QZFYZ2564409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec171f8c18c1f626bff5de21d1a5f2506c9ffadb850d927c53bb440fc16a0579. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZFZ72561701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97004c93bda9da9b73f88518fc6cbc2ea91281afe4cd80356807e345b673180. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ72561702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f12c17fc993b1e21fcf82d04a44235dcacd3aaa532ddd0e69af5887a0b04097. 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/QZFZ72561704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f926968242c2ad1f585ff4986563cb2727568bf608a1f9fdd6d7e24f94baa1. 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/QZFZ72561705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1593dcb1d7ea3d2a85ccd10d0de59c14ff7f23e9947265aa2a3dd2ee08f3cad. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ72561706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3352ce268eaff838d7f65eef76c87b1ea68d72c8b605464f96ad4cbd974b1912. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ72561709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c84b0625f59ce0c78f6c9b61e0d8619b02d1e93f8af45e7da3986eb6e1f4aa. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFZ72561710.