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 0xa3828dc1e5c9e851c29e177263368f29b57cf4b616588776a9be2f08ba2f7294. 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/235dbe9b-79e1-473b-b21a-88d944f943ce.json and https://artists.proofprofile.net/proofs/artist/235dbe9b-79e1-473b-b21a-88d944f943ce.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 0x7ffb2e93c4258258165c4ae86afe0b4cb73bf84adb6ba8a659eced0f41fc065e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE66N2386845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bc31f811b07040f7558b9e7bce7c183ecd44c07cc99874e05e9a4754820e59. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE66N2347088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef291b6608a22fbe7d85e9a02f28d7c686e24d44c59b428876221aa22284bf2d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6A92371162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccadbab824f93cc83ad65615088b121ebfb80ac9d3ad43ff6a672ffffeb7c764. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/SE6A92332425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc821edb2ddb5436cf4e535e87878c81c90d6a591103ed1e8ac0beba7ee732024. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6A92355067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb0d8cef7abce5d15de55375a81bdb018cdba160de753cb578c6ffb3d95271f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6XW2312935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757703710ad929329763549fa1ddc849ec8333a06ea3cf93f379484dae93fb4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6A92361272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba16573ada9423a82b7a20b21ccd8092362910b216b110149c53a3df0831bd49. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE6A92351894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03b1e5590f8671b8561eade36e6a874799f6b3b618009e86db6def18439adc1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE6XX2327258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e6035bcf3d14045fa3fd313230580e42b9e21332535d09e9201cbfe7fd5bc4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE6XX2303415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd654da24a9574d392bb0ac38a2d47f5acec8ffd8736d80bf2b3c278fba1164a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SE66N2305078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41fe0e80f4fc1dba8efac7d0f3d303d4d5246e9995f805e866e9c09a6140e9a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE6A92355688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c84dc48c8123de14fda474d484b302b0b79039b9e2ec21f662af8665521911. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE62M2389417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1658205ea8a5897a95e3d73262048df28c048cae01e8eb877847467bb3c83e3c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE5752444023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb0d8cef7abce5d15de55375a81bdb018cdba160de753cb578c6ffb3d95271f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6XW2312935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f79b030f27864a91836cedd22777817fb3b93defdb499df5341bddaba14acd8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6XY2214976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf26f91c4941980c5a01b4cefbebc103aa7b7504541e7fc01b6af9436c248726. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJX2383223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7079b516f2841866cea9cf6a703a812c5c8365893e0d5c32dcdff800da8e214a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZWFV2492967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6e27dd97de937d8906318affa2d510a45925bfb24bffbbdde4bf255e72a7a0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZWFV2492968.