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 0x47a5f96c5899e46c4279d28e8d7004ca6ea8894fd088b46c9a80cbff22951ce6. 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/cea4e58d-8ae2-4b45-b093-748f07244598.json and https://artists.proofprofile.net/proofs/artist/cea4e58d-8ae2-4b45-b093-748f07244598.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 0x6dfabbfaa1745ee7f3e28601a5ffae63ce1e9bb3cf941f3ffe31af5eec7846f1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZKDK2075594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d90f26eaa04b0cb5ed0e6cdd02e4ba7eb865474572a6f85baac06f2d7d825e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPS809913975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591d8acf059f4b172746b3a2314e4b3438ab7cf288a013a8644d0c64a94ce602. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/JPS809913976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31b745ee651b954b1103441e933a3662c664004b40fe29e439c111687228c16. 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/JPS809913979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc590c58554896a230140db626a3c1208a24742e93d8147e3ad2a5ef6ad7c3f3a. 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/JPS809913980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea9f7aadaf1e75375e6d7cb87eee9e39e1bdb5c8e35c231f037b496bb3a67fa. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM42K1933424.
Afternoon Reverie (braven tidalcycles remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ad17790642bffca5a789dae80bc11fea223ad3a90223c8e0537b4fd4de709b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:18:12Z), 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/QZS632214389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f92d2b31390b9009a6d6143c16c7e602b9340197f397e99ff693e13a19078f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMHL2284606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62debb8ba771fd3c21485389dc60d67ba4ed18dd162d36626ec657a748082630. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZMHK2463533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdb683544d2e9d73814fafcc08502631a0b75e50874ffa6cc81531f72f1d7c3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMHL2579680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc511b8a9f2e3d50e04a684ef9a78ef8cba22271097011ccfb57f44bbd7c5ded8. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZS632579059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a50276475fd24e386ca93991bb7696d4152e82c68518d4b27e0badda4f0a89e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:24Z), 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/QZJRC2556905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6065307ceffbd9b34aea807c47a3fca346c07fc521112bdbf95c4e63bad51f87. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:22:39Z), 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/QZJRB2506305.
わたしの一番最悪なともだち (オリジナル・サウンドトラック)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8acddf6e8ff5ca4a8a58fa50a12bc7010bce255d15bae75029443d63f6a3283. 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/JPWP02300947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82edbfa0bf2cbd9be8e76a4a2675d940d295cc4cf90aa8a05b792e61073c6fb7. 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/JPWP02300948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabeedf616362ccda9b6dc57dfecacb9cc8860d720e2441e7397961bab68272c8. 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/JPS809910446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cb54a53e37991ab81494bf68523df3d53b8a08aa73b9c0304ebe6c236a510e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:52Z), 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/TCJPN2019548.
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 0xe506c023304a9b7f84eecb9845523be88d95ec21dfabfcafc5875649e086e430. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM7281927293.
reiji no machi - in the blue shirt remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bb1af8a532cf211e0eba87f54777b80d8395ec57d1c47f1fe8713eb6784c09. 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/TCJPJ1986660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d40d83212bc9da5e6b36ed7c3b2e2a47a86e129e78c7e1cf3b58f238b652d6. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPWP02300956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802d3c7dceb4429beac3eef8dea49912e54dcfdc6b0cce594bb31a5aa28e7138. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/JPWP02300950.