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 0x306afa2b65c8bb22f472fd27cb54554045ebf2a2e04c74e088c4a15ef9ba2aac. 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/4d2436b0-c8ec-4167-b29f-5382517b22a3.json and https://artists.proofprofile.net/proofs/artist/4d2436b0-c8ec-4167-b29f-5382517b22a3.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 0x8145368806d9278ce5c4a479ac6acdcb4d9032a0a5dddbcb0073ba757cff7b1b. 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/QZW9N2223098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a8d9adfea11e92d68a2e7edcdfd17ede66b9b0fa61a75fbfee4d0254aa5bcd. 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/QZW9N2223099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b58f48244957ae87242c2e7c8c9beb197d2d4ab5fb9fa1fb82dfe7feca93f4. 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/QZW9N2223100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2205ced304f27df6ebd34db5ee981aece5af0158bc493e446c5437fbe8a3bb9. 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/QZW9N2223101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d93917a1bcddbde6433e82f94461f180c9f9382645f6a3eb4445d694a26b0. 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/QZW9N2223102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4d30f7bb83782a885b49d2c748a4810e439fae17c5e746caa884ccd3535b63. 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/QZW9N2223104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5722b45a559b3bd3523f41fd8d4086fe84625d579c027c5d98f95947735aaf5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZW9N2223097.
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 0x1ef4c1d9c1b1dc1ceace6816ebbade0bb6f53ec6a3e520d50914d32e17c019f0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZW9N2223103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4151ddb4fa3cd68ccc5fc9902fdeb89e19556341a8c79a77ebd6fb7e8b8955d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHZ32277386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56ea592d959aba558d405de22381e7da702d1d7d05c9516b23387943e442196. 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/QZHZ32277387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef438bc1a28fc8f4a0faf53bab39021993c86edb883b7618de323f44fbdb482a. 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/QZHZ32277388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d853ed0d2bd16a5d42935fb4bd558d3a2ef4e674e08c5c67ce5b3429abaafa1. 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/QZHZ32277390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aed370ca3e92d5e9e3b86c4f3aa577e143d4dbd9150b7aa922c41ed33ba73e5. 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/QZHZ32277391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8ccc370c19cbd43a8af5abad164f29cb3723e1ed6374d0d2819f7fd9491e40. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZGLM2235573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e3d0329d4a3ace33ab11cfc41e2a9ae957e093f038738e6bf24965e873ab21. 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/QZHZ32277385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53a50420e71663a8fb58674318180fbe3fe7072f3248cb239e7422d4b59bc76. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHZ32277389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ed80bdffd8c1cb5dfd0daa5c51674dad8b3ffecdcddb4874b1af723cd64820. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHZ32277392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df27bd0a2a038d6d513e7259205be2e1a6c38b0437c8e61cf9735de0f1071be. 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/QZMZ92496715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7f2330497eaab4fff272b2d5e6cc45135ce5f93f875ac95ed52da7c4f2e392. 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/QZGLS2407023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d9490765f4e046cac7d66a139a11981085bd05930a9db4deec8e77e9f39941. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ5AB2416253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74b3a8506d1d21cf876a962dcd2fbf192cbfe47de239f046fcb31d3ecfe0784. 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/US7VG2463840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068a39f177d711fce988090bf526b616109ee9ccdae767b109250b2f5a228a8b. 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/QZW9L2367928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54f175301d4a774adb906703aa55e8b2fe36516a3b5faffebe9e07985156e94. 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/QZTVM2316909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2752534f6a7a2d16cab65200cd2698e02493d29b1d9b997c0f988c025ceceaca. 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/QZNJX2359401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434b1c1211e02e116189b3f508a6f3e867529f9c64c2c11d91f3955a89dd2966. 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/QZ5AB2337571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d3a02f4553d5ebfdf6abab5877519a5d9f0c629f884fc84d8ba8a0afec0ec8. 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/QZW9M2247584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb84ecf1a2f446c23315006af481d99a3e71afa330ce8cce25416e6bd1fc3ae1. 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/QZW9K2245926.