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 0x30fcae5b9b3a62f2ae1c2c619c3c18c52c883835d446a5fcb9ba9d6414ca88e5. 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/6e5a37cc-3552-467d-b561-4b3462beece1.json and https://artists.proofprofile.net/proofs/artist/6e5a37cc-3552-467d-b561-4b3462beece1.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 0x91f8bc8aa6963f8a13450db7fac3a107148ebc4ffb8d51d34149ed91e7f40bf0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHN32462062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a07dedafc205684b1c1d5ec82cdf3c0982e4e52faeac3c25611bb6fe38a665. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN32462063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5920925cbad7a5db95d73b2a320e017b5d2753e3d4a9e2aff7910e0bb7861a. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZWFX2465508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21ce8319fda262b041cdd2aaec74545cb79851952a499851078ee44563d12c5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFX2465509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561779befd173b7b90c0c7e0e5113034c6a3c21c439317e0cb2ca9c50faa701d. 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/QZWFX2465510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0b34a29acd28515f46395a3ad6cfdf17125ccd05e7cc000b20565afd447f1e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFX2465511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d4278b1cda265c6ff4422fbab1fbd5ec25c190cdc22d67dc03175be160714e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFX2465512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034d9e7ba9885583a3254d8d18ad19ece0fa6d09619a6ba39a017118cd60dba9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFX2465514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f49f151321716a43dd3d6458e1e6683a7da4e95b2b88e7b882598e936a21cd. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZWFX2465515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545b6af8ab58811f0f1ec4e3b2d27c5709db69f8a2e54e671a1240cd078876b9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:05:23Z), 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/QZWFX2465516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7179a18873b800e6a4a3fe210ce8d65daa3086381aa4175493da35acbff22daf. 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/QZWFX2465517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313f3c240d99d4f96ebe00167714ce560aa9816e7f29c02e70f00b154b13354b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFX2465519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c4a73e2ac44eed23100324db36f75aff15ab807148e997b9f7b97350209fad. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFX2465520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8773e1b6130b6f6d46f602d0db455cdddb4e49773d70551d1b8ee4825018e938. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZWFX2465521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828b131f4ed80fddb0b0d9923ac6a39582e1de066fcd4ed6233fb7553b707259. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/UKTFV2502266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b5660bcc3e1ba2be0d1691cc2ce55621f2597185047d2d95c5addde17d6732. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7N2576024.