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 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 0xcf2332f3f23670504d3877f6a3fe54c62f80f78ac939b8a03da56f5f06c6a2e5. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbc0dcaf-8ce3-4f2b-a1b2-3a1f98cd25d8.json and https://artists.proofprofile.net/proofs/artist/bbc0dcaf-8ce3-4f2b-a1b2-3a1f98cd25d8.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 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 0x77335d8a7a2d0187a57c35c9d00d80d691fc9248eb0e76cef1db505b3380ba01. 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/DEVF11900523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1175ef9b3f64a1d597f3f0353c32008a82a7471347e7081da3f30699771e1c49. 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/DEVF11900524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7a3c99360472e45aaab41f4170a7423a614cab1ba922dafccdf736fe29c16a. 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/DEVF11900525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127e197cdcb9eff343821fd4aab06246086555ffdff4d52250a5fc0f1ae983b1. 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/QM42K1718734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa7f8e86554a65917cb721b1d97bdc3ed76511a8ba02a04cae4143c2f1e78ef. 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/DEVF11900526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e04c3d5e7c2b3483d449e6c620da2b5f92b2c75fb90ed665dbe98af8b84d81. 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/QZAPG1813793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aacea3b6f91ffb93439cbc04ff1bdae9fbd3fbf1f5d8277f7fef2cb308a5f9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEVF11900527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3743a115e7ce204e29b17d4d822ba95a85e50b8d7100dfe969c83779c0c49d36. 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/QZDA72407485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a59f1e61b947e30e8e27317b5ddf014723400f7316ee179e11dbb9789e4e47. 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/QZDA72407486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84453048aa6b005617263b0bd69c86c373a20bfbf004b08cab711aaeb061ba32. 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/QZDA72407487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb128daf9f19005c3e3f9155a9a44601eb57f6d31fd0d26c12664bf0c4bfe5c. 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/QZDA72407488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38a28bb2fcffa24385c749ce3ec363e881bb93f97d167adba860db75e2479ff. 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/QZDA72407490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a1c85fe5fa0e28bf103d3f1b1de735d37b3c0e7892b294e954829aa3ee3e7d. 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/QZDA72407491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bcde933926017c4a24eee2427b1fc0842b640e3644866580fe4044fb418667. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:00:34Z), 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/QZDA72407493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e388eb4687df78aa961c50facf39a5bf3811cdf470503ec9e24ad4285a92d7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:20Z), 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/QZDA72407495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0631a5a22ae6ceb27b44ff6d5bf8a6f2e5fc0c4832c2153213ead3bd1ad43fcb. 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/QZDA72407496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c3edf01075006810401c702577fcf00bc0fe186ff13350c00bed124ac46c63. 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/QZDA72407497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f02708b265e883856b09a6c40cc164aa6c8562b6abcdb01906f566aa622bb1d. 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/QZDA72407498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8e1c176b20e8086f8333c760924a41c2c7375f4cc2fc566e44bb17c0141466. 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/QZDA52121293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f08fb777ca82bbd6076d3dfeab7671a9ef4420bb72e3595c894bb5207a71d94. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:32:23Z), 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/QZDA52121295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf813858d78b6366aa8cde85923f4fcd2c17ee3cca29672d9f1f55aa58e51406e. 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/QZDA52121297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2482e9831a958519750a80c69cb4d065b8346b1e3ea1d1b3778d2eb450c1a191. 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/USA2P2312527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6c5a0d3bb8bc5bde34b3fd9f9c832ebe6d487b18f23ba139511a248080ba5b. 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/USA2P2312523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dac9be574ead8887fb43beab6335fd00eaed6d9fb432d524ca33fe833f1708. 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/USA2P2312524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee60fe3644da4971ca080a23254042f333f83e258141f2a30e45fe7437e2b5e. 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/USA2P2312530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea23748442366b3a4a9c17d13954610cd6c9c6c4da822a5be221fcc0f669901c. 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/USA2P2312529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10940e8664ddad8db0344550773623bea479f03b55e64d74006f8d4738600ec7. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:21:49Z), 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/USA2P2312528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5ced31ebe32b65e22a12669734dd1bf4c0c47d715f43555503382c4efdcfaa. 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/QZDA61998127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa53c022a2e523cf80a113e0bc0e13dd32e6787bf5aed1e3169a081ff8e33b3. 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/QZFZ32238206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ff19758a9d230f53e53eaba46c5aa3aa1a097cd5b439824f95a094af7414e2. 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/QZFZ32235665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644d425a47648672302e7f22b5f2eac41888fa207ba4016a687975523e77f60c. 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/QZDA61997479.