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 0x6ea1f285fc5f81a4cb41dfc96252a8f8f7136ee69fe491910f048da0133e91c0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96d55224-1af0-4e48-8e65-db2ecedb0468.json and https://artists.proofprofile.net/proofs/artist/96d55224-1af0-4e48-8e65-db2ecedb0468.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 0x0955e21255ea76eee27769a54bdf08decc812934e1472f97f2ecd90e8cd43b56. 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/DEZC62375588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73df5021273127c76ae9f6dd18dbacc49076a2dc064e96e45e305357abf30efc. 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/NL4NL2120214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc432f12ca1b89bcc17703567e913bdf01fbeea8af7bbd4d9c1a66f90231929. 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/NL4NL2120215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd452cc5a17a437b031769aff7aee965ff0333d764b270dbe4e822ef033bfcc. 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/NL4NL2120216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae1f839335babf43656159548151f75cd0b29f8b7127f6fbe2f7cc2a2c7afc4. 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/NL4NL2120217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13ed52e50bc57c98a1b3b966744f99c23640476091cde760172eee6ec8fd1e5. 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/NL4NL2120218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72af6bc934b62d12e2161199652460994d224f2b27c8776d43853a502baaccf2. 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/NL4NL2120219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb438a561671db806ff71cb80e61364b9afc0d8fbb70499589d8d5c578e937c23. 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/NL4NL2120220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdb3234387163c0629491c24796d6b827b6d95891475db37e0516e4c014e1fd. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NL4NL2120221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f598d6b62cb358986e5ebf67c67b810b3ed8e424728233f1468e937a34e098. 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/NL4NL2120222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a11a53d639cfe8cb702aa70356be8692f09a6580e8efbc05188b8ab5ac660b. 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/NL4NL2120223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839411575023967eb80bd7a1faa2448fbdc2f6d7361f62f4ac2b0149edaa6b89. 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/NL4NL2120224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bfc65d42d2d1e77f135bf442a3783792ee4a09d36d538d5d0b3d26d2894f27. 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/DEZC62448416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49143ddb9e20d9b5d480236c26651fbd01a0821e9588f9618546a59206db722f. 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/DEXO12470643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bdc8bf6831642fa9463cd310cffa64a3f6a884e2eef7597a2e9252ea9ebab9. 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/DEZC62355219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44071c8a4f89f623c35c8e56186a755cf11dd291366bef5c214a1e6680f773b. 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/DEZC62365650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bdc8bf6831642fa9463cd310cffa64a3f6a884e2eef7597a2e9252ea9ebab9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEZC62355219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fceec53844c8f6aa5c12399733712518e095f46079aab50c50fcf0f1567bfda. 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/FR96X2115827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8cf3760cb6a604f5cadd2cbf7d4ac46070c793eee56fa5e1a30fe3f457151b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DELJ81963506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be5e7c95b158e9a901150051edda88be76c74401be44cd68b8bc9f44d677448. 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/DELJ81963508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1175fe99c943cc770d421eb427432c0f08c0e3fb840e6e0ef020f676f83fba09. 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/DELJ81945518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a66af8db3d790f705159e0a6f9e7052ed7a451c23f41c7ea1ccbfe9b85e98b7. 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/DELJ81945519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519109d20b6eddd8df34dc0a260bd4ab587289ac95291b2052dbc983b2082b5a. 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/DELJ81945364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0163d1e730363e00068ee10123d629eb28da0e59cf88aa208f546b0723c9202a. 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/QZHNB2154285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51937a095426f379064702d5ecff4032d5f7a86e7a8f26c9a81819e805421a7e. 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/QZHNB2154286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed1acd94efae4bb3e426c0260054de46579857b3e60973139543b355b4f6731. 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/QZHN42174601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d857641464b74379ee88a78b20b43d216e565e4dbd66afbedbea4bd4e58c279. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN32145112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580c9665a988b9ab90235e6eb66389cf485a0173768b69cccc362e305be74ea9. 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/QZHNB2154288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aadc7da4d89c40e7ba774be71c676435bda65e768f46765c6b378c6270b0bc. 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/QZHNB2154291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5376f7e7ecaca670f1031c7b5e0c70a5a827f4fb5723cb3cf4c57a02b4667141. 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/DEZ651709986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1a24962fe5b459b3a0ccb206af523508abecb55f9665fa03dbca8a479ceb7a. 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/DEZ651709987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6b7fb7d3bf3e7a69e86c342147dd857b6b50b90ea0e265281d05bbf2b635dc. 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/DEZ651709995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a28bd856a0f90774f79cf047c6fd7ddc44f9748a055114732652b2489c1f0cd. 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/DEZ651709998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe873c979e2c6557bf1bad027e726c25ce34b481c5be1eee15264416c51c135f. 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/USMH92374675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445d03bb1b447d3d37c5d7998a212666a04fbde21ef88e7b2e0715f2a15277ba. 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/USMH92374678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7cea5559982761b5a431171c8d1c1a866e95559f428328d241193c0af0314e. 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/USMH92374681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd402b9087a2b86bb763d660a5db77920c7637d8aeb6ae850c8ae86fd28649740. 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/DEUE22350279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dd30b89e48091b964ee9f407cf6e190ed24b30941ee6bc47916c0e5f52a456. 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/DEUE22350281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebefd1385448030030a7dfc0d99a9589e4055eb9214b37d66915eb6d12df24b2. 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/DEUE22350283.