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 0x2716ac11569c631a4e1055a41b8f3f69336ee0ef239da13a95dbf5b0c037beb7. 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/ea578d64-69d9-4118-b0d8-f4cb717989a8.json and https://artists.proofprofile.net/proofs/artist/ea578d64-69d9-4118-b0d8-f4cb717989a8.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 0xd97ce518a27f28165fcd0d54c11666c6ffea4256e7854f07a1a1abd84c20687e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZHPJ2100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7970eef95b99b14ce241daddc2ab315c3dc599a81297554c73bd72e224a05bd0. 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/QZFP52164575.
ブラックシュガー・ワンダーランド
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eb59fdb9305796bd2d7009e3236ca5039efda098244f3bbfd54d7fd2c6deb2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM8DG2532612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2e7c3236be097e45720663ef99237923fe323a052f3adba54cae7d960fba60. 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/QM8DG2532611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eb59fdb9305796bd2d7009e3236ca5039efda098244f3bbfd54d7fd2c6deb2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM8DG2532612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f4992f7de574d2dcab22d105f26f67c37f3ae3d38c88db378b566175c3a556. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM8DG2532613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3490da98c27219311c1a59a65c296d008dd53cd7f11302e06bf2db4ccbea2b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JP92N2519376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991ab627ef00c80f6b0056f98c47d6c7168eef4ee21adb789db3678711273286. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JP92N2519384.
ブラックシュガー♡ワンダーランド (Unleashed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2494e1d06f6e481e0b17c73d2bf85a0a41c36d3dc993a2c89c5b6ef6936f4d8. 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/JPS801837897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9567550c2914e88b0c95f13519b6dbbd4cc9a56fefad8571e9eb50e9aea2d458. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/JPS809913477.
IMMORTAL HARDCORE!!!! VOL.4 -Ghost In The Hell-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe922eebc1636a1787918b0a000ee0a70bc0081841d545999d0eddbf9de0e02eb. 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/JPS801833940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28477d8f98aebd10f38eb20a01328b3317db25b213337888a78d79b19afc2758. 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/JPS809912120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d5c37a954b514a54b7aeddd1d975fc8c79f78f03908351b263501b6d0ef789. 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/JPS801956080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb61656f1b87bf486ddafe1cf36d4619e0a8bb15914fda55ed330e3de00a2f. 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/JPS801942453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425edd703a92f7e1a4eb51b910de958dd009a4fd87283b7cb25e22a9cd01dfe0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JP92J2400951.