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 0x8aaea7fb31e37649e87c18b2022ff66dc65937c1b037d74dff327a8bde6d7c8c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/458fa56b-7e24-4507-a5a7-e9fe69942c68.json and https://artists.proofprofile.net/proofs/artist/458fa56b-7e24-4507-a5a7-e9fe69942c68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tone Sphere Original Soundtracks - Dark Moon
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 0xd7924bd2a122f28aaae5c1787bd54ec247a4b0de70ceabd9ecb1693f20b96eec. 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/TCJPJ1965101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdecc5cd2306967d934b842b8ad50c3e0847eaacf35d16d87fd5340935f30211. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCJPJ1965102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106934f25bf8fc298a19ef74dca438533a1b4428e9c1f19fd43635fa1e3170c9. 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/TCJPJ1965104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034e27b55a2d8bfdb93790bb1057d62d66142a85fae46ac82fd59aead7940c3a. 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/TCJPJ1965105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf7886c450d5492453990c3ef4662d08127ae82f32a4413771b88d46b284663. 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/TCJPJ1965108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864169a951500fe357bd28c57db142b6157ed94d3e5e1a440f2f7cdb13002e7d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCJPJ1965106.
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 0x95d9b9f6004e200a290b6acb0646112538466857ef3a6dd645668a7bc273e954. 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/JPW562107920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc524e644f0637783ead22477ad149053c83b9e469bd0ccdf9bea91a0809b6e30. 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/JPW562107923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddbc540c5fa407ead7e347363323d83e4e3cf2cc6df3c65458e59dc392e49d9. 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/JPW562107924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1257aeedc19f2191dc35c0dce10b3b9f56e238a5edd02c035c49b6c6f8550322. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/JPW562107921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c525912015b7aed0622066e7edbf1de500666b0d4b97e8df59f303339378f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPW562107925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23be11f93e56807a69d8bb5494c787b675112549af2a047987e954e6c6fc9535. 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/JPW561904199.
ツミブクロタイム ～ 舞音KAGURA.ver feat.東京アクティブNEETs<東方アレンジ>
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b8c79717f7dc60da84009a958a4f6f8b82c606bc02db8b654c0252baf651d1. 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/JPW561904201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1179902063a8b85abea5b9ab940192efaa41324e884809785074d2b06ce071b8. 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/JPW562106866.
存在の耐えられない軽さ (feat.仲村芽衣子)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a553c23fd2132fa0de0ee0307716f941792f4ee8899bcb5be1a233e90c88d48. 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/JPW562106871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c5ca4982e6cf15c25859f7981cbc1f14e885533bd3bdd4a5003f8375fc3e89. 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/JPW562106877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5e6e4f613c47ef1ebb004c40b819d692205ca1ef1ac328c58cb077264129ea. 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/JPW561809016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89affa50a616ac587f2a85da4d8273e2ada27ac1884da47bb06974159ddc7816. 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/JPW561809017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae17a5cf71abafa8bbfd968612af8537e1805cb49bd97a8b95fec7e57019cd2. 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/JPW561809018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00511a121f764985cf1f2ac13d82ec063d5dde5ee53bc12f0356e394211bceb5. 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/JPW561809019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aaaf2c284b48c6804d4cc6fb6239fe1d092976d17155d02cf8fa4dda5cfde3. 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/JPW561809020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe408ffae421b0f627a765c67c51618d03571413046dfe8564c0535c5a3363094. 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/JPW561809021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c5431066e404252c9cc3ac8c2823146c667cde3c6db87a39983d965f08372f. 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/JPW561809022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99080415ded10147cdac3d60851ee8b2181ffc80eae351ba930f722b6a3dea63. 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/JPW561809023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf9c15d98a7aba8bed67ed7aca87b3f2ea21f172db6f06772ab250f8846fbdf. 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/JPW561809000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2d698a8706e784844cac77a51e80da6c4273823f07157183e6d79d85865957. 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/JPW561809001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aad4c7991ae87e7f4d0c9740be17d3ba1d296813d845236056ce3ba6d96c1a. 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/JPW561809002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7c2e0225f9ea501c1591c2b22b6231b5073917fde547625e025510299201f2. 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/JPW561809003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3568ec8c60b36732b9d3bace86e48f68faa32b22df050101caf8d505dc6358a4. 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/JPW561809004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605ab5c8236164ef09dfd04f3a0199e47d013d43ede7544bb896d61cd231d4b3. 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/JPW561809005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057639adb241aac56126018961be8b0c6a4a49e3ed1a3786631de9c8750bb99f. 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/JPW561809006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49758363f8823c842a66414f9e28561bd24b28c0f865c8087e2b8e32236c3872. 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/JPW561809007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ccd03467187f99716124086565fa1d19520ee376d6fe78906cd102211ecb4b. 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/JPW562108719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635f102a0bb4223bbaf8f127ecd67d96a3faed98afbf0d041f54b5d9e098fb0b. 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/JPW562108720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5173af61a75d100bfff80a4811f211e88d378e3c435b72394b2a0527bad5d2ad. 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/JPW562108721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35107d49a72deacf6fe4e17b3d101adbb5a117ffc98285f3a97adc351bdf9b29. 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/JPW562108722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b916eb7b7a0e761bc7eb8017570c97906e62ad7d9f41520014def5f9b885f5b. 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/JPW562108723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907d9efe0f36fa5f378614f5326d1159574c2f3303d120928126e65f5671546b. 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/JPW562108724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ad62f585b6a04d17dd59f2fe1c59a550034d1a747b10b2ce4e4259c05f8952. 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/JPW562108725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f1dfdc20c777676e4eb33713b90f1e9b5259540dacbcb76d61321795bebd1. 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/JPW562108726.