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 0x88d312d14b032478ee8e36c63d7f30e44bfef198b987435fb331a3c88fa641aa. 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/946c171a-ecf7-43a2-af50-a6df21cb7a75.json and https://artists.proofprofile.net/proofs/artist/946c171a-ecf7-43a2-af50-a6df21cb7a75.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 0x1d0c6f0e0579156de309db50074513ec1c330c0c31db33cb93ace502a067d9d3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DEQ321400506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1359c206129142d68f41aa6d813cc027fe9c7b95cdeafb42a0871e9031a399. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEQ321400500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6d6ffd70c61ce93496aeaacc2e7dbd5f8b0a0226e2da3d233b16e8f9b0c360. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:12:39Z), 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/DEQ321400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a1365b8fbd9db568a676dda244749fffed1ccaee37a709263350f5931ee8dc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEQ321400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2757703b6de2e891fdd849be7897416b63e030c13f3b9e3c26d6aa98e02f91e2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEQ321400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe84fe81609d736a1824d11029c6b8273848aca728077d82fe5cdd5866bc2901. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:05:36Z), 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/DEQ321400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0477fa9f137b4d5e486e0e2266e3e58c80fe55ecd102e02dcbab041618c247cb. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:19:38Z), 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/DEQ321600423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032517f992a2893db63cbb7e1a0b54f87719d2d77620f94cde61b8a591d10aec. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DELV41900555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c65f8457d08dacf41f406cec9085805e6dbe41aa0846ca448dffb968473c7cb. 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/QMFMF2106091.
Wolf Biermann RE:IMAGINED - Lieder für jetzt!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1592a7eaed8eaeef9cba586aed795d59c2eca1514c46ddaad6b7e84f36270eec. 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/DELK22400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9909d696e16bcdd2ca68e7b87a882f533b5ea13d96f8813247118e9458dc7e3. 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/DEA451905580.