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 0xa7f00484962a9c2c9806573b95a9c6750e197530516805fc5138637db3c8ca47. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6dd05e0-465e-40a1-a545-3c21178026b6.json and https://artists.proofprofile.net/proofs/artist/e6dd05e0-465e-40a1-a545-3c21178026b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
オルゴールで聴くクラシック名曲集１
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 0x058674d7b1f03655af24f3c1ef257dfc1d13bf3c940ef1c1d7650e4d9f0de154. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCJPI1983810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb34e9c3cac18e92daa5563d59117d9e3ca8e6e7a0a6c3d725a00821b6dd0838. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCJPI1983819.
オルゴールで聴くクラシック名曲集２
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546b33fe2c730592ddb58c5abef9624b7503b74ec6af97bbb18fc3267d8a3330. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/TCJPI1984482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9089fe4d63ae9a6f35e2946ba092c546cf8fca7b2b1537e3f3af36c43bc249dd. 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/TCJPI1984490.
オルゴールで聴くクラシック名曲集３
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bd427a9e03b40157d7c3579f1c6b9cc476ee71dac316135348f64281e47b53. 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/TCJPI1985213.
アイネクライネナハトムジークよりロマンツェ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15340632c72e4b0266737f81ac0347f397575fe122486eff679104032f9a5a2. 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/TCJPI1985219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc4b7ce8a5425f683fa8ddfc2a5c2a8ceaf6e9a5849c6857505ef5d0c0f6a8b. 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/TCJPI1985223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80bd38fab0590ca15f0eb2fda6dfb7cb806cde714e03a813effcad64c74eb5a. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCJPI1985228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d540ec96e5985d2b624022ceb510e255584d5fe59b584088ec2589bdf805a7e. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/TCJPI1985229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf10146eccf443c4fd471b3fafef895ce80ab9ed1cb4aa4c4d9b9fd00cd860b8. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCJPI1985233.
オルゴールで聴くクラシック名曲集４
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf830a97abce41a6dc576ac01267c8845cd6d96ed7b8465697b2c98d5df6f2b41. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCJPI1985238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d552d0cc2e7ac86ed1e2a808e40898eff90191160304caad3621d51c2f88dc. 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/TCJPI1985240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0607de4c57e21a764ff2498dc53b8f6915a263a5987090ea4877f4b43d3bda. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCJPI1985243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc766e28c4c84bc8f28bac5665a58659ab7bcc704e8da3bd4246adad5d3a32ffb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPI1985257.