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 0x8255a56db43cd043117db5d29f3a43dbaf4bb313f801604269ce9214e2232fe6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bc07f09-6445-4658-90dd-99fb9ff4c63c.json and https://artists.proofprofile.net/proofs/artist/6bc07f09-6445-4658-90dd-99fb9ff4c63c.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 0x7d65ec9eacc7cf78c55c7bc26d93c685c7059ca9ad76734d27cb160645ff5570. 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/QZHN32419681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bee8a8eef71acd53f11652c8ba66bff0c154ccc5ee6ca747a4190ab923b89d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN32419682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293fe62b480287aaec3445e05dc4e2403f498b49ffe80116df860e118a02ec2a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN32419683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0a5b4d6ca7cde135a2ada63818b88598821548b440a95734e2f1ba16906902. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN32419684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293b59099c8400896424f31c123d67684baee43733480807e9753320018ae995. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN32419685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b045edfd7363c3d5979e27b61e2f35653b6b0e88080fcc9be7f6418b1197ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN32419686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa078a0f227a68bbab8b300f1db1d12c7390095acda33ad7a7ed514921592d12a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN32419687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58f72c3c8a8925e4009b0b491995142b91ac362c6f7feb2efe9b9aa7aaae961. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN32419688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2214bfb7aa83164b79af79183e325a03ce5c8a9ec2aa0de50b1cbc4b351da4a9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN32419689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c356441ce2ac489038be405617bfdad7bbe213eef78792f879241905b4859b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN32419690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6294593910718c18872c6220d47eeb9cc3d5fc57a2dc2fa19f79c0775bc6ce. 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/QZHN32419691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd653c1805d79ca79fcb3ab6b92032d3513129e7c574361524e8c37da69502302. 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/QZHN32419692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd63c96cdec17372556ea2b30ea96f89e171772e889e5d2d33f5ca937bd62b7. 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/QZHN32419693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db45f5f4e40bdf82cddef1bfd64704100cf2b2f15de40b7a24303cf6a4557aa. 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/QZHN32419694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd405d0105bc3ab7d9942341706cc74654fa02cc59f61c6ab2a69e0c1e4aedd. 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/QZES62240842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abf5cb900043f7171f7e20735a11c6f2582e6e27a038bed59e8f94390dcc868. 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/QZK6F2233624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8644fe43a6ba6e0bd52f60af93c00eb38947e5f81b02ea42b217601ec3efc2ae. 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/QZES82272682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e82cc36e9d7bc0cd2584c690baa66b8f9f9a61c64cb79c279e033992f0c4859. 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/QZHN62203449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04a507a9b657143e6602fdc96ea9ecf14eadd6d1dffbcc2b471f673996f516b. 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/QZHN62203450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb81d2573dbbcf8ec1a1e8a182b94f8acee547e11923c3639743715ea139efc. 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/QZHN62203451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64432ed49b32299976bc1e9f74bc90c43f41686cfbcb711ce653997f4417c3d4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6F2233623.
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 0x138ad3ea0188cf7d45ca4dabdf95934b6c6e33f9a915ddb2298c710d63c7668b. 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/QZDA82205194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74474f5d2d8cfdae0b41a76ebb66743db13f2ce2dc09ce0e5efcc78853a51b18. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZES62240841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6a1071c80d460b700f40e7c768e8023acac919492ca4b8e7813b560b5fa1c3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZES82272684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b29b482fcd7f02b0ce500f73f60e16669dc2bcfb172329a0aa6f03f4b3e8bb. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZES82272685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef822dc96e332b79452d3f22858e53cac2d79a6cec9b6722d31344fb7e82a8ab. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZDA82205195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa50a1a98dcd2d2746a83d5a23e63725170e04a07baf91becabb3d7b20061244. 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/QZHN72452132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e55044b3d23f5eab0b4fe6f77b5a0de115b0356a8cd3d2806ea54d307bd939. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN52407844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f7dcda29c806f5785ac63cdd674c57a052103ba96e546c8be544839a995238. 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/QZHN42498079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8d8036713f7feed61aeaea2915dd44cf3e2bef1ac1a29203b3a84995e9fe0f. 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/QZHN42335245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c9308f5dd210370c05c30d556888a8e234aec5830bf7b0429bdaf90433bc45. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN32356063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942d0f50f2b2c57c7f3a34ea7cd41f3982351047fde7cfb084fa91d0cc4cc55a. 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/QZES52391862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7d621dd80dc2c5fe8891b0279ae2d34f37d41215dff279bcfb8379d4ad2b89. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES72119762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b275621271aefa21b22a9a2ec168f31b78fe2d4ba7461faab87ab1dfb66c1c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA82062429.
B.C.T. Ntra. Sra. de la Merced Viso del Alcor Sevilla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ec90125dd2ccfbfa0ce2a73779cf8ab9658283d09c94af772017bdf8c3baf4. 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/QZES82489727.
B.C.T. Ntra. Sra. de la Merced Viso del Alcor S
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19351747969a6ca9545cd106f1ee76a34aa117b715c5256c91994b3ce5296711. 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/QZES82489731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b9d3fa94b22fcae2f87fa555772343131ba3b7e662ea0f96de597fb9a116ee. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES82489732.