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 0x7e503249b1a67f5972b85aeb5fb3011913c8157beb89fca8285844e88502681d. 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/38332931-eb5c-4587-b544-20b4c9de97ba.json and https://artists.proofprofile.net/proofs/artist/38332931-eb5c-4587-b544-20b4c9de97ba.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 0xe90e552ef410e6091aa11d0c883ade3e64561ff0306436f117ae8bdc23b697e2. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/JPC641100467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbc72fe2f63bf15c8b0d49a7467a23dcdc98cb6d0401d83f12e9b315b7c03ab. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/JPC641100469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba13e54e5d5e0f43e94780b0729a3a6eb1992fdd1a252fe50da468b53b2e1a67. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPC641100470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d340f65d02dbe96db99c75e53a95ef63e7420a05594e5517a65ffcfd45b6157. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPC641100472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe063c2e99a19e717cfd836d9b1cf4117f9fe89b0ab07306b8f41a8e24605a219. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPK401200561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93355cae388262c80fe81273894352b06f0b45a3eaa9fd58b93f4b7377de2c07. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPK401200566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b831136aed7266fb6a9f878540dff54b954f1181f86d1961baa943027b00c7c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPK401300659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11c795f427120c1c41c3e30e82a2e0e29630a1deaf12baca16b7ea29b983dab. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/JPK401400712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c10383089912fcc9e6e375230b1e833c1fe53ed7d515a6a94f3fee1b5932d9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPK401400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc12412e2615d61c2a4c17dd6ed0410b66913bc758704b522e701c9c21d6cdd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPK401400719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecabc7c024bc451b35b446f5ced29710b4b024de271779edccc0d011a2c1cce. 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/JPK401600776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d35cc7dde7a7567be6755ed514094e6970ca5b7051a3202efbf20b5f2de7c4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPK401600777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272b561f49948b0a2a0c1c3985814f3aa0f3aabae9e78c955925a84138814404. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/JPK401700853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92484d946d96fb90a092584e70b7dbc8c699afb17fda21327d99c844831e3ee. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPK401700854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d130243ef323dad829edec6bb5cd0ca77cd59ea3f8d06067969b15c5cbd071. 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/JPK401800900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388cc9e844afb79de338c17a334dd36fac271ddb9d687755049df050538d49bb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:58:30Z), 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/JPK401800901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129c2ffc0cb11e8757c1487ef273400bf592b0355925d3cb5147c4b417df9d46. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPK401800905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5741869bcce0350f990d75a9246592e8c4a9360941981c405ca0355ea932ce27. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:46:10Z), 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/JPK401800906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc679a7334c517cdb58226880ec35f821233347a6b346d8a82a382e31d5cec0d3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPK401600839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ab82deca877886cfb18f3a4eb95e5ff92f16c8fd64b895c4205f4378e6310a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPK402101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5d53d63b87c7c1fb5b4055e752fe2a0448baed68947d851f7565c02cb7a3de. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPK402201110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef1f814c4b44fedf8029305baa43d82c283f2e89d7e49216c88703693ff956. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:12Z), 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/TCJPS2279668.
きいやま商店 ザ・ベスト ～この歌届け～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5d53d63b87c7c1fb5b4055e752fe2a0448baed68947d851f7565c02cb7a3de. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:09:15Z), 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/JPK402201110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d96e5ed0c1dfc5df9d1de560a17ffd0d209c58d0399d0ffe8095429be886682. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:21:15Z), 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/JPK402101057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcc1ec1026341fb9dbea0b3266dda7ead882c2921c71b50b147ab0227bbe0dc. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPK401300668.