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 0x9ba87b9d42399aa99ba729103258ef60489904d5079962012384ca540b8a6c9f. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1856ffdd-fa55-48f2-987f-60ababdd1f4b.json and https://artists.proofprofile.net/proofs/artist/1856ffdd-fa55-48f2-987f-60ababdd1f4b.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 0x66ee463974bf6273772a78e2ce3ea7b3537cd357c23234ab81ece4254f1beb16. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPY201807269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6d2c9375ab6e2c0d848c6d25cc24a48cebce003401349761e4af81df9f0cc4. 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/JPY201706912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ef2dc08cd43bf5da399299cc93bae5d10d99ff2b4bdf3788d806f9af6a873a. 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/JPY201807313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf873067aa02efac62ee4cf1401566d844008f632cb561351bfb1e49f29d23dde. 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/JPY201807153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc417b1287214340cdcc61eb2c82c78e37c867b493ddc8e70f0090af65747f69c. 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/JPY201807314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e03a00e0abeb884521067e82765ae6254f81e23243aceb976cf9e0cf55eaedc. 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/JPY201807315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac23a9c80df5d73b2f6c27346449a95f69d5e21d74ad6827459db1462678f042. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/JPY201807109.
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 0x5dccec08ed7f0778a745b6cb83bb4265e247763806c3f58f7c1166de9c01c1f9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPY201807316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540bb38b2bbada35337f16db0c03e24145fb48c5e49d4a5c5eef4d3f1ee1c1cd. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPY201807318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7803a507ec0ad45285d940b3eb46252a048540a823b67d5504b8c34320d3d3c. 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/JPY201606653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1b6cacd787da69b119b5bd480b51b1293214ecf298856632f0a61d750baabe. 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/JPY201505877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea1a20c540a0d24f9835cfb9d4484053879d964ca8904216d23bcbe770e9f52. 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/JPY201606617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee928c01e22a2ce093e0d516c5f0f6a004223d01f259f3423e8f5e58f37858ef. 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/JPY201506071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfecc09b2eb63712d8d4c1d1e1901ab9b62615320cc75489f8472e4ce6f87d5a. 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/JPY201606656.
君との約束 feat. USU aka SQUEZ pro by DJ CHELSEE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce8f2bdcfca4f8963ae4355c62433ec817d81c37fbb472046d2d4d39c717267. 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/JPY201606633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113e56fa0fd329eedb5d707c3defc047498afabf8a7b3352f3155de28479febf. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/JPY201706706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f92ae1646824a128f15ecded76d0343f3496951c547ab95d69308517647ee6b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPY201606143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb060c0b3be57466fbc4250ea218517a1a4402f063cbdac72e4136e5a2dcc9224. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPY201706710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16890afac0f58013fa41be2a0877c2d252f3fbe2f8db377ed58db90de6ee1739. 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/JPY202200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e4a606da63054a74bb7e5c7cb3093ede511c18684f47a803129032d9785cf2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPY201907384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b37111416a3ba6e572f68f82f9f1154f12884c5d34178bf8203e8668ebcf2ed. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPY201907468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b5e6cbaed565910d8d9350c125655d8b16faafe13c68bdc76111c2570d1aaa. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPY202100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6ef4fbf82adb52e21310eef12c2151cf8fc402d29660e1d15a3f361f9a5feb. 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/JPY202200283.
Mou nigenai (feat. ATTABOY (SHIN from CLIFF EDGE))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e65f82509ec72b96c797c9c17b97673fb69a254e588146b23d86118dd55682. 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/FRX281963960.