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 0xb3e2ec1291c8cf0081e4b14175b0ff2412a652be0b35ec6edba11a30cc52707c. 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/3d8e130d-086a-4b8b-bbfd-81b647736950.json and https://artists.proofprofile.net/proofs/artist/3d8e130d-086a-4b8b-bbfd-81b647736950.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 0xa2b404eaa005715fe56a113a92543556b7d7abd46f032550ad7824c5e97a5429. 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/USRH11103431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d5bfd1387a28bd3494059d0774cdcf9b950e02c4799b46ac9efecd097f9ec5. 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/USRH11103432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa586353ffc14216a67362f0633d9e4ea360c6885240fe8bd699b855f520669f0. 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/USRH11103433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb3b1652e7432d0556872e1337ea18f714c93ee68bf13b4a88086171f4e5741. 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/USRH11103434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da519e37130610057652e9dca11f25876a2d30356543fdfee8c68e25a4346b6. 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/USRH11103435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7b0acf880e3e29f7005a987c08436ea2db6a98e55ccd42b83fc31deea15048. 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/USRH11103436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe375bfe3488cc856007010bd811d5e8a4795b9f6e78196426ed6824909b5dd2f. 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/USRH11103437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c116dedc835253e1e590cb23245229d4336a025782cc2878e7384619b68ae2. 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/USRH11103438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a5c80fe1e35c5240d570ec42629ed37dbc2c4dd72cf68f2ed589744f8e2e6f. 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/USRH11103439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464578553978d09d69dd44b1d543a6018d2ee08fcd25ae07a2b9a0909ff47f04. 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/USRH11103440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d711b8cbc8de36c135434c4b8efa467b7ef92b7d92614a3f483a7395f4f4dd0. 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/USRH11103441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21e521770d69601f3481bb683c64981153154c46d075b241189cc4e90778cc3. 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/USRH11103442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a470e0f451a0a7dfae0ea09bf83492af46c342d7630c511add619faed8f178. 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/USRH11103443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaaccea6be6c1ed973ab510ff334ac00f061aaca073e79992a953edca0812a4. 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/USRH11103444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b74218cef1e2b11f16aea81f0b454d39c0ba98c036ff569a5ea54fd2c73b77. 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/USRH11103445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1822209154ed8eef85ef561f329bacd71fd8a994e1245a5d7cf13a677fa05c4c. 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/USRH11103446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e01ac6ea79066fa07d8616bdc3545ce8d3b64d9ec61a3adb8d2ef3bfce99f37. 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/USRH11103447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a4bef285afee2116d79e4e4c70399419624f307474bf5ff9a80c82c6ed7ab1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USRH11103430.
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 0x1644b687dda5d9b8d3a9cee17ca43d8b2a9ac164fa094311fd7d155a9f55ad00. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USRH11103448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276f95747b1e308503c1d36c96915730e78d0bbb1fa4beb7f66d54b56919e2aa. 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/USTB10300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530835931d5fb0b1bda82cd5fb4fba9f787f5af2570b2721e064ea6046c7f2e4. 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/USRH10403510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba6bdc56338e57408053bc8b6b834b090355e34bda8c75e836629078041b478. 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/USRH10403507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1393f0f1d627b1136c2ebb1e558a1fe407e431f3934078cbe835b8f6cc581057. 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/USRH10403508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b78b9f007dd54f1f1712e42c6deb8aa8a422e70cb482d24a198e1928cb660a. 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/USTB10300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf037be15e2d581f6575def7302e333945f2ee26743e9afb3b282ed37588d28. 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/USTB10300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbcb923e34f8db2c432d6be3aa2684f8decf9343a03220e2553cdfcaf24d019. 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/USTB10300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc102f4cdb30350a13380c66bbe2d5f8422788729d5623eb16d1f05ec5a646b. 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/USTB10300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0403a386742a06a2794d9121021fe65cc403b2e33b5014d5efed381fa94d74f7. 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/USTB10300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8518984370a8db87884303f5736f4563131ee100daa8a2d693db00b783bac522. 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/USTB10300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939798dcdf2f8c0c60042db4f5b1a9fbb921f82949209040337f25114be94707. 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/USTB10300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc054b4b2e0409ce0bd1fd12d721fd4cc5a804d8f13a7ee16f662da5998abd681. 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/USTB10300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfacf88084644cc85267a15f6cee6c1220c0f3ee7c9c9e0405955b345c1ae468. 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/USTB10300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c36fecd7be98cc0092c6f07455b3a6a8122ccd2163dcfc671e71dbeb8337eee. 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/USTB10300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd3484d1f120f0d69756a5360937190dacc37c0d23cc1394af4247604652c82. 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/USTB10300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f94cbb6bdd8feced44f53ed36de4747ded81b458de98b98542a1d31e0e531d. 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/USTB10300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2b7fb103ad361f8220b5b8a83e0c5320fd358af3f48e98eab2c086d48eea0e. 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/USTB10300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d76516691b581a392bde68c8110aeaceece747708070e2b65c882b96a54f5ab. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USTB10300213.