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 0xb351b630de575978f91225984845a4b2d2fef8cf97ada3a231fb80afaa6f7035. 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/93a2887a-9001-4d61-bbd1-ca0749b89d79.json and https://artists.proofprofile.net/proofs/artist/93a2887a-9001-4d61-bbd1-ca0749b89d79.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 0x9582f81f583fceff8f71b8b64d3e38815fefb16998043487196a89a52a76336e. 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/BCD4N2400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ac1bfc3ce5c3760c4dfdce5f350e189ac75302769dbb7752b977f5e98d3efc. 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/BCD4N2400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d68989e788f5acffc8449198af761d23ad8395cdb0880c9fedba5cd226d604. 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/BCD4N2400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ddc9c18cedabeeaf89c9f95dbb84ff7ad812be0352c4042af61aa0e8cbe8fc. 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/BCD4N2400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6079d1f5a2dae9a7e4d60eceb674a8bb8806292f0dface1091d719d0954352b6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BCD4N2400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d1ddeabd8581c5757b6fa2417bc609e56545bed317bcf370224286248d6c20. 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/BCD4N2400191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699f5cf368bfa6f84720d79dc74caea58bf7aabd89db7f8c089124959ce802c7. 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/BCD4N2300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc436dabd7d0fc7f2b12e4f7a6a3ba4a8bf4d44c38f2b801cba0b5b493dc711. 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/BCD4N2300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7391f067da1de3ce545a93e075269912d14fe52aeaceb9b685ba04d9b28b764a. 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/BCD4N2300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f149bc3928fc01499a00b300406213c7c04ea39aa577a67c1c3b472132d62b. 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/BCD4N2300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f4c549694d1bf83c9ca828d594ded248599f539525c8831f34d8deff14ea85. 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/BCD4N2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21507b025e2d02764f19419c5512f2462089dd556c915d1ee300f6a3c82f1510. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BCD4N2300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6243a3c6e917e854362bb8f3f98c07fb79bd760f6cb0cfa8de59799829e6da. 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/BCD4N2300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c50fa893e8eeec391eff5268cfa577e8d48bb4c06cfd73ccd2463f66803da1. 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/BCD4N2300263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a28547cdce5badce294cc34acc574278469c55963f802ba9cc367d53e32ffd. 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/BCD4N2300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1f552e5cb4fe1550f7d74139ea00b3a75051d5baaea14b996cfc7074f80ff2. 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/BXDS92200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2ab5a1f3c15d243420def44a2fc8db186dcae3025fee744009375104ec1b03. 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/BXDS92200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641b7ce5bc4d7bcfd5a321dbd68f5f30d46cf9464fd8bc098f129513f1a464a4. 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/BXDS92200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7f722efa0b56cf3f688eeb2f44e931f247991b509f320f9a545d41e2c8af89. 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/BXDS92200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574b2f6945d3a9cb4846df7169d1edc7f8c080636439122866fa23e43f5fed7b. 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/BXDS92200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4778f54f7a05192c9c3ced54afba5df2778d3f3f3a83c17358100f9393a59b1e. 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/BXDS92200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5e06e2431a89254c989738ab77e35711922601582dbba256f5b02d1beec7cb. 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/BXDS92200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09da370555a2a9c8e84dbb4ab34e7c7d59d1de3600328a86948372cb8f3ea308. 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/BXDS92200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b92932cc3ad00a5ab2f849974c801f08c46355d41035b34c906ff526aabeeab. 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/BXDS92200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b436a1c85ceb318ad53791ae49fc4e5db9ebb341b6dc8be50cd2141096e4f8e. 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/UKZGC2411271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650a5179d0080e801bc20f8229e3fb9f6ff1466fd89a931bb03d978f192d6d2e. 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/DGA0R2489178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fe9798e55c09691242a1627a600d66e423f048fa3b5d67cd56412ae6a3344f. 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/USANG2470117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdc4cece27d1d5a797886b006a5f0a51f947d7f72041f01739ead1438c16571. 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/DGA082471571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0a0979a5b9b7a0192261f8d1aeccb58d67f009e4e91a0555f341cf330fc9e3. 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/US3DF2484947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5770ed5e0d6a390239251bffdc0de2176f3c2b0f161cd1d21bb77cc04ba2f602. 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/DGA062480782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab10e03b1cdfc44dd426ea5f9a13a7e1d8fd735ff735e488c2fd1b14ab5b9a18. 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/US3DF2482057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00adb173386cca6703a530bbf358e629426a752ef335ee7d3f988403683a7f4b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2457533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f425222aad6b0a2ff8747358e7b469a82d1c73f243a440b149634fd82c0d252. 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/US3DF2446887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9276de5bc9ea23e0440fb410df07f6b26552997920029e4e2adff4a46133eb3. 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/QM3DF2280621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc509a1dd296a253e47e550cfd746ca696aaa6aad42c6e1948590b393d31ccac1. 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/USANG2209176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c92c73b9d9839528b5f5df361a3975dd8723c1edce39903e28eb3549bdab59. 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/NL4YD2200216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42390f4849db8885310262d25e61cf4443f98e8dad8456e50c13ace40261a56e. 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/UKZGC2407080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc59d681ecb276c3e04f9b853c1eb8d53858c68e641b9b063967024dcd64352. 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/GBKQU2173489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91af40665ec0e21c2b1fb80260b7e86361b2805aeac8f501f48f138003199cd1. 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/GBKQU2173497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3a70433e5a0dbe95e25b01da2d7298a94c16cdb9558d9f11590d7f6b3cf828. 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/UKZGC2301977.