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 0x3f97ce2b839e734afda437bf87dd5fa759d1b6e802f9356a7970e8f47fe930dd. 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/ae1ec5e1-7acd-41bd-aeae-173c65bf7994.json and https://artists.proofprofile.net/proofs/artist/ae1ec5e1-7acd-41bd-aeae-173c65bf7994.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 0xcb594c24b9ccfa33eaa38d0f1d85be90113cd41834cfa43650f2befa584bcad9. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/DELJ82077497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87530b61f841b9c2765453a93cd27eaf86165403c37afbba06aea7664aed9878. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DELJ82049901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116a9ab83d8af1cde3f3ec84f37f643bbe06944a86a285ee3ba61723de298e66. 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/DEZC62167137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcadb0ea036e61406db358b8607ee76e5430427e3a2c85160b3258c23fc54df5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEZC62160891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4cb4f48dcc10c08a4d65604a7cb5aeda1c2a0e01ae8217c2427ec37354505a. 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/DEZC62186446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7d8eaf5ece86fb50b14ec9a2d838281b2887fa5894616ea2a3ad4a08b1f118. 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/DEZC62144314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7df915cf937a3b4aa1382ea753a1438608800fd60f0fd9d3e0d4977bf1aee7d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEZC62144315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202a8ae071bc7a5b579f52308431e3123c82599e7a2dea729814ab64914e481d. 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/DEZC62121744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a970f501e91ce1fd72c02fb55a5691fd763a4efbfc152716fbbe9e13ef1c57. 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/DEZC62141902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805149e9f61dcb02e91a0e2bd5e9b479ad3dd793afd648c39157f76a3ef6b990. 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/DEZC62125954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07a22fe3f9d15173b36fb5f42a1acd1a060751d735d35a05d35a9bd6e13fc00. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CH7812195626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3bd078086c2abd487d3f1edb5488151c8b338812039c4ccfc6829da5a0713f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEZC62144319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5a9929f8294a295d6585668052dbdf53db0e018b18501999bb3befe4f5bf6b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DEZC62108296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6a4f4b7079c857ccd915829dcf168560d2aa8a6dc3b02727ac00d257c22df7. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/DEZC62144322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc6d225aaa13921f3127af8cf602b3b5721c1eae6651e943033c13be0717c71. 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/DE1CZ2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81655924107b41cde63261d17366339ab3c1fe4797a54851da80d69e07a71d51. 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/DEZC62273326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06b6ce07c24ce460e3b7abda9e10e0773c0a8d7d433904d04852a64f569aa2c. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DEZC62273334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c03a97ca2d3cd2a5b430cd00ecccf57ff4b2dea1ca377cd55622c6c913eac0a. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/DEZC62273329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c4954f995d32d05c5b61b0706613da83e339599c80322ed4b51252f332a221. 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/DEZC62273330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57129d0122969512a5c9c1e914614ce6a4a59019e0e249075779ada46493e15d. 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/DEZC62281868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972b1d641cef4dead651a741ee9b17ca52c6651ac0860cfe26435a0ee05b0eaf. 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/DEZC62204898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a85b012d140be35c4e4c8f901365afda3f170d524dd4a430f85f0caf21df2f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEZC62341969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377ff3fd9a1cc2301c32ef4b1ece5ac3ae43ba75f5dfc974a0ae9e44c16f3b3e. 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/DEZC62356480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81678987728c406a4484f789ebb96d7bac7dbda2320eec1f95858c2345d8f277. 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/DEZC62351294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5af48fdfdddb1ec8ee8f9fd82886a06de583cb740c230bf71d907d1abd555a. 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/DEZC62356481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6311014c9608bd37c5ffa460e61ba33cd203f098d7559528638cc64a9d74718. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEZC62348445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1f6d6bdbc5fb5462c7be93d3f5c0281911eb90dffe6a8ca9b617f253602ada. 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/DEZC62356483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae14f796adedf73e5e93157ccf8deee7a76b80ddde750f34fbe57f0bae5ba508. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEZC62356484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd66471d9f31c4dac239488c62998b0747ae81f7e035c79dee0a7ec0bf2691c1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEZC62356485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277de998b8e2c965aa6ea9f24782b905b703ef8143c27e43e7c07f7d06b65160. 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/DEZC62495299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f99b8dbe731ef6cfd85447007d273634ed9c5bbfd9b9615febbef77b097fe38. 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/DEZC62499327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95423e60677789297f7b21a1c4d97672a99a28d70097837d1ebbb0542b6dd55a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEZC62499328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6417798bd5ce1096acd36f7af2413cd4b39fb952bca1277a9bcba6f2d4f8ca7. 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/DEZC62499329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ab3b09c1bc882261bd36d199d0d128172b7f5cb75afcbe77b98199844e70b1. 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/DEZC62408402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab2a419d6cb400efef2845ab8aa2210317f20fada0b065356b890603b201e29. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DEZC62408843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1864ddd92fb26f690fa06b7b286eb47fb8349ed274ab6d44e3146f702f81c28. 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/DEZC62403018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f89d0f6a74602fb900cba546db26c23566e301e3ee3c14f64d4084ffc8031f. 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/DEQ022271683.