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 0xb9009484902bc540a4d2f616c03c15e529b7bc795db3a4ffff10a1df6619ffdf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c08c09c-aacb-4070-beb9-41bf4c72b052.json and https://artists.proofprofile.net/proofs/artist/1c08c09c-aacb-4070-beb9-41bf4c72b052.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 0x9126d2a7f39240436a54557426e0f63d71e75e0b46c7068d1f5950c324988a05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES62207375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26af9821f0a1b62e13f53f570a89fac557533596f43bbdbb53e9fcf7967067be. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZRP52433074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9040783d21b9db9de28f46dc5e4bf8503bef646ffdad402c51a31d02001e89af. 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/QZMEQ2473777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ffb2094a22b194a10191dd60baec0f8d227232db55e15dcbf4efea014a19cd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN52481718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047945b862d93e82af6282de3865d4a8471efd935c718cb32786d08d38624119. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES52448226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429e9996e4f166c17277317331f2a422eb7fdb95563af93069aee454d0da1e65. 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/QZWFN2312937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f97c69b1c359b9876fe3b6e4620080d4456b09a4bdd524b0c4d7005d7d14e2. 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/QZK6P2368743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee6e705c7668fc9e990b0d12dc95d6675fb34a476fe3bf8639791387eebd89. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFM2105793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66cfa051addecf7f97781fe73f45aedc4aebc3cb5d75ecff4470747138c3399. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAFR2175722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad96d737bc05c0123e1b9894df08f523a4cbac9edb35a954cd2ddf6ffe35b89. 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/TCAFR2175661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9103e7eacfbcc26114561b2eac5e7ff30cc1e6acdd632c9e887317729ad8f56. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFR2175664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db2b3c75e694b9bc5e3ad0209e133b700ab5e663780fa2eebd919260557804c. 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/TCAFR2175668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b88f22b67981a1f2c74e1b0990a8e931e3a2599db9b5a4535b9ca7acc95db5. 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/TCAFR2175672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2f29cacf1f3e7af5a997e4a638a07ab6f0a4fd229c3f511c76442cb7c3f62b. 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/TCAFR2175679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa34a510d099718046a43052fe9cd8cb98fd458ac81cf5cfc803425d8161410. 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/TCAFR2175683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d70f2843211cf161932cc71160f912572cb0f622f156cb6c3af446a8a4abbd. 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/TCAFR2175687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80be2d51cea2c9ee20915c137fb0bbc8376f780e014a1244f39af0b30abda5a. 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/TCAFR2175688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc9c3d6da2f28915cc983acf92e760e5754f6e9661488c0ed57859f1a2f5b57. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:42Z), 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/QZFYX2329575.
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 0x8a57ccf961ea2027f4b0698b0d9e2cbcf6cabdb5f1d47daff13c3da3a052c6b3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAFR2175676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fb01679f29c021e4bf7ef279b9d39cf2aa58551771f06f69de303136f7cd5c. 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/QZHNC2302415.