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 0x3634437764a54cf1ffd48e4fc2a4a6742b1ba9ce58ce628e9cb8e4cc59495738. 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/29a8114a-62ed-493d-8512-b70e20588158.json and https://artists.proofprofile.net/proofs/artist/29a8114a-62ed-493d-8512-b70e20588158.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
It Was the Best of Times, It Was the Blurst of Times.
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 0xc2061a5c8ebb38e266a54308ed4af2786f5938d9a947211f3a8516328d824262. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAEB1902767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c62e24fc4a078675126946a86ff273ba390891b739f759a9448a2120d9ac546. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAEB1902773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f96111a0ff7ada1408cb99bc0d722cd24b02b441b9a48e73555b0320357f9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAEB1902776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe215b47f316409545966a875dd6d0736b095ccf070a8695d4a4f54f115a09b7e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAEB1902777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47424d3d4ac71e8bbaa8b80f20ab5de8b3801d9429f76df6f16a2263b517272. 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/TCAEB1902779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906261c1e663becc3df367ed36818dbbad766c6aad5ac3a0c0662cf774afa7b0. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAEB1902780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d10d4151687a80c86043e918c3fb6b425673b54f55d2051a82895cc7ba17929. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAEB1902784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6523c9e3828c9534da2a2aa3ed9c21773e09784a0ac3aff8dedfa6f8a88f223b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAEB1902786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b7a1df7830b7b4c894f5a622240503d4b2b5e0c65adac9dec3b06f8b8d2605. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAEB1902788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c96eadb56ff56125bff371e9edabd0117efcf91a49e35f61ffb9c15ba3c7b3. 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/TCAEF1959791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d01e817012e9ec7f0eff27e72fb2731f382f77ecc78eb7ca501107f44da498a. 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/TCAEF1959794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b6e98e93c54078255144327214ca8b900e6e3db04aace71d15c53c297c44b7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCAEF1959809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906d52cad5a12aa478da107fee4d78809156ec9992101586440d554efedc2553. 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/TCAEF1959799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaaa4a28ab482e724f30b0051cd66a553f18849b8cf3c14b7b951c451b366a6. 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/TCAEF1959795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2850672ab0e3495592a167a912ee1953809d5566d2475da1753a9f0be2674922. 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/TCAEF1959796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68e8fac2460796bb909feba5ce7ec42d4bdeb4f8bfeaf8cfe42a4abcf56bc9c. 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/TCAEF1959802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbababc4cc950793865133bd4fa5cdf8953212da337c2116e6817568f2328f745. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAEF1959805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf972715fad918994f7526e46eef82f8b12c86c1ee959d22562cd3e2282c35b50. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAEF1959811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac180905dcb40b6a7c0990447b93b52f18c125f1e93432db3c4aab2d843ac1a5. 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/TCAEI1933619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc622223979216ae12766ac6324379738f69fdd039551c6aafd16c4d78671e2b. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCAEI1933621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668d16eef6d1edee150ebe28e543742a13d8d3fa41df4b0f4d75a96dc2f2b7bb. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAEJ1971588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27487e250ea31a408f72ea232ac3acf845ee6a85b6415a55d2269d73bae00a9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAEL1988994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda51c7b39bb2511643ed46171a519b8a721d3a6e822c3f5af7dd2b20ae510128. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAEL1988996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f363e28b884f0cb1a6286a14cb42fd9a06be154598939f80561d2e3bbd6cbf2. 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/TCAEM1970971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6655f7624fba12d0d2327f3486cc3955abdbdb975bdf280978c8edff64618781. 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/TCAEN1927879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d946d554e2d69f0c78605d5745bf9397efdeaf734ceb515f7dec8936aab0fbe. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCAER2009786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd916a1b7d59048b1ca8bb0ecd2d26ccfea7cb2f4e5f89df59cc0df680acdf9ab. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAES2039571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717e2fc4d1cccb605a4747139a54418e7cae132d38fa9d9616d453c207577f54. 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/TCAHC2386317.