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 0x9c507381daf8301aac620739acd9977725a75a911c22843cb89515dd3739852d. 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/0b80c02b-c45a-44c8-a963-a417a7b7d593.json and https://artists.proofprofile.net/proofs/artist/0b80c02b-c45a-44c8-a963-a417a7b7d593.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 0xd81b6c20c63a5a5a223127d1199ac16ed932cac3874075fbf5dca3098a365188. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/JPY392200673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25c653c4aa448bccd19614a8f68b96b6e8cc32ab150153f93a99e6d510852d6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPY392301115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4ca0d93badf514e0dbfd3b892eb7b32867abfafe9496161356555357ae1e90. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPY392301249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5046c5bc570807c4e761f3aa59455648b8d2ef0f8f566f943831c73549c855b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPY392301322.
Cover Live Album「LIVE ECLIPSE -prelude to β-」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3977f9a59dc34c7f4a2c0266d66c339789f0d4d4b64abec7f9f4883e649d4ae6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:38:15Z), 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/JPY392300944.
東京は夜(feat.はるみん。) at LIVE ECLIPSE - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a6c2459b554fdd1cb1329dc4d37ac929faf1c6e8218a69e5edaf6fd61a83e9. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/JPY392300950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483b1e4860a8ffbe774d1cb21c3fa0eeb9cafdff799e836dfada789d3681cc9e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPY392301666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17247935025ed9ca664336584d3b8fe4cedc751ce73a94fd7d039f7fb1c444bd. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/JPY392301668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473f65a187a0e5116783b37b019e6904aa0b5491cb9adc996c7e465f401f6a45. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPY392301669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0a0694d5c07d61941b270452d591e104b6d9f39f0ee07fdf435ce02ca79963. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPY392301667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c2e8bca325d9ded890788df9ebe9b91b95c4e27585c1bbe1532f7a472d89da. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/JPY392401887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d454c47e259e0db87d055cc58dab813716b52d3fd77b12ec3cdd45693e09cc. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/JPY392402124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b58bb06cbe73d792fcaf03cbf923373b559fbed5391895158d8375d25bd58e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPY392402127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3dbbc0b5c98b58146a7fe29f16cc32d9bb494bd904862e213f506b48e00948. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/JPY392402129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9924681a607f89ad37ad1d920fcf013a608cccc9296028da0639024294b6dc84. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/JPY392402130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d7e718639c67c5b3a4e34aba7240d051ea9c4f1b03eaaae58365facec481f1. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/JPY392402131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1a2e7ea49433d96b1f6d940872589167d7340797a1e0a7669de8b0c028e0c9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPY392402133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c97936992153e3a23666968e78e7bc30a3b49b0c346c0aeb36a7cd4d4d9928. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/JPY392402134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0933313eea7ce645fc769bee176d548b53c99896d31dd69bc0a3befd6df1293. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPY392401889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dadc8b7ddb951348acd86bb642d94a1d4be5cf536c346e4a7568553b010d4b5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPY392503181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4f5ec5faa1ee01180d6e45a9a126a8a48b98e6290d035e3b88c26d45783e6f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPY392503183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3472902acac62ab112cacdea722164d8aa640c8fe78ace74fbacc1d0dedba148. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPY392503186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa869f1134319756a98ee2a12f16d6635d5fa35919555e5ea1c3d0e56dfc38e42. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/JPY392503187.
Cover Live Album「SINSEKAI SPECIAL COVER LIVE」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bae3d9a1c13d0e6a339307dd9498b05f381de722ca13511799a321c5f8db37d. 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/JPY392200777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd297e0db86c0c03763a78161c997da9dae468c0055651c333e841c4c6de20cda. 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/JPY392200778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d1cfdfa7f4077aa117baa7c0743ab602fa34df8b354185d33186ca1d992764. 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/JPY392301624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d1cfdfa7f4077aa117baa7c0743ab602fa34df8b354185d33186ca1d992764. 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/JPY392301624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ca9feb8d563705a9743dd6657c5c0e2be8fe47fa5386fee47186c1230c1df0. 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/JPU902400472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569291e65e2cbc9a14a44c0a982ba14ddff01d12bc6f26963cb7fe8a54576ca8. 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/JPY392402050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ef259c708c7afe2420767775443c8cbd48941e21703399cf0302543b2ddb13. 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/JPY392402497.