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 0x6b3935179b3746016030cc6b065cf025a472746110675199b85283ec53bb9113. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69cfaf6d-7132-4107-8cfc-8b9b0c9053d5.json and https://artists.proofprofile.net/proofs/artist/69cfaf6d-7132-4107-8cfc-8b9b0c9053d5.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 0xbf7b1b44f2566298c5982554bb41f63f7a9668a12fcfdca5cb63d67ca0ab02fa. 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/USHMD1220202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6805840e2f87bef6319a2485c8bbbab577b1d4e2fdbe4de819885c6733eeb384. 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/USHMD1220203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548ffa6f68e94be6d74c3b66a017865a11e7e9284429fb597e84548d2e1ea9d3. 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/USHMD1220201.
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 0x610d4efd667deafb62be41a51fd495a368cc64b83715a44020b4bed8202786fc. 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/USHMD1220204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362e32849ab0e8593cb63b3c750730aac5c9fb7597cb082d016a5c4a1fc2f0e4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USHMD1220205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bb7a488bd170425add745176697752abce095f6126f4aea9578dd83c8816ab. 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/USHMD1017802.
Post - Nichts Ist Wie Vorher, Bersarin Quartett Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388352968b76009a97f3bb6a2f159f64935056067a374993bcea8869230fd295. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHMD1017801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a41e1a39a6490d8680adc2e6af741e92be0ae6bcd1c322966767cfc6e65af92. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHMD1017803.
The Days We Spent Within - Near the Parenthesis Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d908d346ef097ad5329c86eec30e4ac40f625d153eafcddfb67409eed37eeb. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/USHMD1017808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c168e36436b374e60229a565ed98b20f32bab88754d526b98caa56468222c8. 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/USHMD1017809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda52804597c10dfc2b651db7355d86f0359fc2db5e2ced44e15bdce29d61a8cd. 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/USHMD1017403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39e73202c601b8511f8608da15e4978984685d2cf919c8fa208e4a69889edf0. 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/USHMD1017404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a85d726838ce7c57bd6f2388437a823c4aae0506791e8112354ee2a4fdedcb4. 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/USHMD1017405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cdcf1b0866d11308ab89f8190a8405f011ed3defba7afaee7515012b7f0bc2. 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/USHMD1017401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1879677574f389dc43c8191a04cdab0c83a8d538dcf9d64ed77d572a1dc081. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/USHMD1017406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87206416a476620ebfd5aab721b0303f00124d5cf47d9cccbe34455a52e2fd86. 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/USHMD0715602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd9b75664cc89f39c265c8463270ecf3909e2c393d96c94c25092859c90bc9. 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/USHMD0715606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2172c6e7bc2e3aae682bd148948e585e7fa99e440cea4d2ca387791d2a7736d. 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/USI4R0601551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1dca179a278b6cd5ab8605f3c5180be41e3ad7bf0c89a757b9e84494127604. 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/USI4R0601552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b354333b544f8836940dc9a6911f7161801df64155f56020e975f66d9a396f5. 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/USI4R0601554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7981306ff4afab7fa41e2a3058aa4a39298ab0c3394e77b12efc32e5b00de7. 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/USI4R0601556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98f317335d7e42a4aa2e201f3b260188b647767defecd4522ad8d0419453364. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USI4R0601550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637739aba230f3aeb068293feb5f22b419628876f5d0aaa9199b2d1ddd7a1a1b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USI4R0601553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80484d96245363f41b82160f153a10d43d58f60604b915bf71997cb884c94d55. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USI4R0601557.