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 0x4c14a87db6b654cafbd488680e55be2387385b50cad352220814f760ff36d482. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67963cb6-312b-4d86-ab1a-81ee9b2a9e8d.json and https://artists.proofprofile.net/proofs/artist/67963cb6-312b-4d86-ab1a-81ee9b2a9e8d.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 0xff86326f9f49c0d467ae6171419768e9a6e5b5a52ba176b0c208edfc017fa93e. 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/BRVWS2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e57702450b9a4f7e93e80a9317179280675dfeb0879961c5b07f3307c4b2da. 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/BRVWS2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd1376c44ea534ed30508bd1baa9c96877aa54e28a79e8ea3fc58874baca435. 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/BCN1R2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66268fb3f9841b7a3570da3d3ecf91db2348c92da25eacbe140789689115f394. 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/BCN1R2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66268fb3f9841b7a3570da3d3ecf91db2348c92da25eacbe140789689115f394. 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/BCN1R2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb565edf518e4096f2c718816185d04caef351ac8581c6ca4c7fa3c1196a2801e. 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/QZTPX2316527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb789a3922c18342374caead85057abb616086097e3b0743dd9dea1c89919e195. 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/BCHIP2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c350f454f183fc0beb0b45ea76e18123d83bace3bfd9a7968fd8f26cbef19d. 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/QZ5AB2097427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23863ddf12dc86865d19ceb5319cde87734720982dc47cddf0fa1fde262c2292. 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/US7VG1995725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ddbff8744cf1b5707705431aa3d1d83592911bebb29c8f5d83f6493db64df3. 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/QZGLS1977699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b72dd5d6b95cf85296cb8fe382ae720e12155cacf2ca1d18190b8a5bbf3811. 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/QZHZ51938223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a65a5e6323b0f218368eab1e906b8219121c1d8c0846c87a7ad8b370bcb1cf1. 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/BCHIP2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c03c0023d8c23d48f0d94152d19f5d843f075f9fea6d779da82c677deb86cde. 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/BCHIP2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9934fdd35629b422cf1b617941b89858d0e1fd39311f5c2dc006158dc8a1eb31. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:47:43Z), 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/BCHIP2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d86a655824988d7783aebb704f7f544b00fcaab8d1607ea22e2901ffdcc1a7. 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/QZHZ41950398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0f2913143190935214b8e44f3023bc5dfc61aee6b67b56fd50366d1a76de22. 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/BCHIP2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe581eb9f8882348b385c64da2675985bdf83a33770afcfcd19d5a932bdeb4dea. 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/US7VG1971172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fd0db9ab5ed32bd2dc75bd1847c427c1952fe3801a0e09d86400519a38c614. 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/QZHZ51954928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d59ec8ae1eef1b08dd02ccc9292624bfecd550e9775fd5d6cb976391defd801. 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/BCHIP2100035.