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 0xcf6a1e4c9a2100ee38410f99d11160b24c605adbf0ba0f4d26b5114aa3035556. 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/1a02bd5d-1430-486c-b65f-a91c3e7cd2f9.json and https://artists.proofprofile.net/proofs/artist/1a02bd5d-1430-486c-b65f-a91c3e7cd2f9.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 0x20fb674c48402b05bd99c9ac976860393f3ea71685498c4fcde696dce50badd8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2390786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb1655253078f66ed479c9d4f6117de45f19dd821c1eaf282cb29f978dac678. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6N22336517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21e79d61e94a17f402da4061c784f44a2701930fd91fcb0f9d4820229b5a70c. 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/QM6N22336518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cec5f25c269a3514407c9f42f029cfe63e2542dad968aa4d0b317eff2dc14a. 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/QM6N22336524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58648f044b977825411ed6ed02e3c3b4248829ce9cbeb8f7cd47d154d9b78b8. 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/QM6N22336528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625b3e321e0d889b7205992e7f59d0af0e13ac55f433438b708ec67ca4bb89b9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2361148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0a2d6becfc5d63568ba3bb6e6b68ff8db4ebed56a54f36c86d10376339db54. 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/QM6N22336531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f06ca04f67e8d323ebbfc6058fca4470550d6f6eff773340e5bd3a2e73d8cc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6N22336536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bd349c47f615ca13bb83fc37889fdd2b6cf0ccf9c907f3621d287cd9635893. 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/QM6N22336539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e360f26faec4f0a7877bed86d682b1d549590818ac967c91cf3e5801dd14c9f. 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/QM6N22336541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe886a41ad9d68c0d860680d907ed03b88f19c36d2a1aee38475b351c6fa4b3b9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6N22336544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ea4cfdfa724973499792c25495545e45fc8f6ddfac294370872fa245e21e59. 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/QM6N22336548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d882ad77672546f4c26c11c6c38164a7f2c6b3d5417323150d811c12d3348b. 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/QZHN92095150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe95e9dfd957f6988de28e2cb4338a03444d4e681064fe4a15b133fdcf5be5a. 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/QZHN62085548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722dfb120928f141ae8d9235a7f23be09981df24c9c6ccac0167cf96483dd66a. 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/QZHN92095151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b3a691a443e2c43a95499127aee6772a65fb1b243d1a9da6a85b5323c36fb8. 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/QZHN92095152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a58ab091e74d2ff0018990604e927cc3cf6a8b798f90481fc71c370daaca93e. 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/QZHN92095153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f9641d741468d025c00994c4d4bcd31254c3108fe31ec03fec772336602f7e. 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/QZHN92095155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b61493709d67cd47f779c55bd6425988a3e3f2a7e4c32248794b9248a2804d. 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/QM4TX2406907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb1655253078f66ed479c9d4f6117de45f19dd821c1eaf282cb29f978dac678. 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/QM6N22336517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fb674c48402b05bd99c9ac976860393f3ea71685498c4fcde696dce50badd8. 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/QM6MZ2390786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625b3e321e0d889b7205992e7f59d0af0e13ac55f433438b708ec67ca4bb89b9. 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/QM4TW2361148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43bc53bcb9c8ec6abb34db2774bbb93ec075508612ed09041ece73f808e096d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2227875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8751892f69ff3aca555afe9ec2b62699bb225301711a2800fd650e51ccdf86. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL2201318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0a76db39fc0f2769a0e4aabc2cf27a86b569ba2fb96cacb14228397e862980. 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/GBKPL2282223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5e2947bdd42d9f2dbf23599d7cd5fd72db577c3aad82557aa6d08da5ee8fab. 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/GBKPL2201315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1b3d07d61c8e8b7eec22e166e44c38296530b756a699b7b85365476f2d881f. 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/GBKPL2201316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5e2947bdd42d9f2dbf23599d7cd5fd72db577c3aad82557aa6d08da5ee8fab. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL2201315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559d5e1dd24f5b0077b734d8a62d21c1ffd11c67eb0d157b65e210266cbc2c61. 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/GBKPL2286542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0a76db39fc0f2769a0e4aabc2cf27a86b569ba2fb96cacb14228397e862980. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL2282223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31311b960c6fcd95edf789081f4cb043a26789972491a13e296934db3214955. 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/QM24S2107256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccec05ddc0bead35f659817e1a0888873a9a57884620de1e6a0f174e53d6205. 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/QM24S2106427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93450cb999c45dfa6d48f47d9a4c600fd60c0baf08993930b64002a4b3d89877. 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/QM24S2102941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64cfe5a9485940a73e210fc239a8e38f62125057152cb015a58eb57f837ec00. 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/QM24S2102243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa3996a013a1e0c1ff5c636dfb04c060ccf19b3370cee88a2d8efc1a54060d3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ32139642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9476b86aa1a0f7877319c2a9acd2bc54418da364891564cd1bdb5767292bf5d1. 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/QZMEQ2031195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2c58426cc8dd260df6619e74f7214ab9b6ff55824f94b59889deb1ac11dbe4. 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/QZK6H2084998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4514d873079e7cb5e2122324defacec8dc921d49c6ed6611da5a3b724edee1a. 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/USHM81915043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af1e1bed0aa526eaa538bc6ca9d03b09499be70c1a3d515e8c5fd997f18f21f. 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/USHM21816122.