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 0x4a508552a90e3df2bdbf90b53489d1105bfaf614a90593c36baaae2c7c70f3e6. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e24ec00-de5a-4625-b6c2-5f8374cf1f73.json and https://artists.proofprofile.net/proofs/artist/7e24ec00-de5a-4625-b6c2-5f8374cf1f73.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 0x7373f31a85d4fb012674816c1fa411d865a7cb4a733d8a9204a2b8af93c9cac9. 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/QZYFZ2334935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f287339e482f7e24e2cbd9661b64e39c3a254772db92f56ef2ad93b0be91e0f. 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/QZYFZ2334936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f71fd9c791dea3909ac76ee500fbf073bf2fe28fe0dba102da2ecd4e5df23b. 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/QZYFZ2334937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee419e9ec3dc4a8f793e718eaaf3b9ea2dcfe0bbb5aff1b669a6171b0eca7f57. 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/QZYFZ2334938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841fcd0826938ab3779bbaa5904bf93cf318c807791ca8f880c790719d78069. 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/QZYFZ2334939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a0cb52ea5e3c00424b524463581190f164ac1a82bcd9b626ee30baee719f56. 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/QZYFZ2334940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825574e7d37c074c7bb4c6eb8dac8ea0801bcaf5ba88a3b56e095aabc5be0b3a. 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/QZYFZ2334943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dece08e7ede4dc700422cd87f15b34d2923117a2f28922a6f4a206ce5823d6. 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/QZYFZ2334944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68df00b56d027e05e1b19a88ad9a539234d9e142dd51fe7dbea131e997b6ea. 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/QZYFZ2334945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6535bfb2468a20ac75cbaf4c2c9768d42fbaf6764e7162361f8de9dbd5788899. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZYFZ2334946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388e3ea0acade65dad2a1b5f24a1f6b2fb57f718b4bda4ae3acec6cde7f90cd6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZYFZ2334947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62c688bd710b0796c130ff77baa95258802d0b4aa345863049c93a5ea8e9d55. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZYFZ2334941.
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 0x664334b72a19885a85687fad21e6a1f4103fb241ab9c04dde92fad0a7d201f9e. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZYFZ2334942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48608df594f3f75860e7870a7997a44f71a16b9a07f864b637b5a2814bf074a. 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/QZZ662415110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de517ea10a0af7f49ce25b0f0fc785d1efc5dc54d34cb78b9aba1dd3d1e7aba. 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/QZZ662415114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca500ff3f6b8356c65fdd5f9338b342b2f06cbbd729b36b076d9500037b5cf2. 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/QZZ662415115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f51563670cb189154a1e0fab336aa6283c68c8309a132fc73685aa2b5a89c11. 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/TCAGY2342950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaabc05a7b57590afda39a70b75f702dcd3d74c19c15cf4e6492cb89f2c30fd5. 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/TCAGY2342955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89b42e4e9754ab42c4044e31c8e01c6969ad0de500308b5d7a14e2dd5868a51. 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/TCAGY2342971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace9ca8a3b7bcd235ed1927b29e6684f48c6e02c7f16ed16d791cdc37681a42c. 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/TCAGY2342975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b5f45641edbf0c4395b0ea2a1f22860a60bf2e7a4466413848fa7a8ab0def5. 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/TCAGY2342988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02e47d1180908230a65a6fd50185338ed5f9955386774737a69163293468bdd. 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/TCAGY2342991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05172507eaaa265e2f66374244377be93fd0efff341613de72543b9b9968200. 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/TCAGY2342994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d48ef2588485596c02ed4ed5825c131860292bdb8be912243a3a67cd0fb343. 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/TCAGY2343000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d708219a529744fb9269892107b9dfb0a58a2e056022ec66803941b1bb98e3c. 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/TCAGY2342887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa9f4c34acc0f561e55c8ec5dcbf0a24f1d69661e3eaa9a355e92c5be9f7048. 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/QZZ662415117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbb246b7a908e4c8a29d09fc13f247e226beb6b587d8e459de0a222b5747e3a. 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/QZZ662415118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fa6243a2f124118af906657298456fc3a29d81cb2d2d40e1b50c7a89f1dada. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZ662415120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7359a2f16988dc7ce6dfbb19f8a963e50dd2d6a220cfa94ed63e287af5d3b378. 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/QZZ662415121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5487b09c107799d703adfcefc066772b06f6e9f7aa48f7ab93b6c1847c48d7ec. 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/QZZ662415122.