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 0x130fdbd902a3acd59287eedc018ca1ffddc0aa861759c53d90f3bee1bf20c6a7. 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/6989ebd8-5df1-4a40-b980-3362f39b79a1.json and https://artists.proofprofile.net/proofs/artist/6989ebd8-5df1-4a40-b980-3362f39b79a1.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 0x61ccbdc2c2d8a5ddb433551b5dd6019638961f1dba93fa0bd42fdaa4c5c2b433. 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/QMFMG2330443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afe7eb2a4190dca29a475c5b5857c0ff06a07b17aa9e53a0fe7aa3e9e282d0b. 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/QMFMG2330442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a7e97c5658fe812b7fa3c55f3270e63b4e2f1bb04b0b1327bc3b27e856c4ef. 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/US7VG2327399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d00540a215a35237c3de153902c959e9d69472f34a39d3eee7fb3c16f7869f. 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/QZTVM2111438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a9cd7a41ccda47343ac0b5fdcf8a81ba844feb61af1f1991d891d66b01e35. 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/QZTVM2111436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d5a3bd6f7439559cb3c52cb91999c15007e73d3051a792d071debf83727266. 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/QZTVM2111437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dcb77321163a10be9fc7077d86074854d522b049445b65d380d653d6c6bfc3. 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/QZK6F2118949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575a3bccc0be1ba4ee03e304a43910560bc2d753bed833fd40acce9cb1cb688e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZW9L2370914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6c21e221fb85a22a148a099f8d8db6ebab104ae2e1b6c8ea6640599c836c14. 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/QZW9L2337628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e664e687b755baabc88fb254e7d144e6cae4b1e59db9adfcdfb5bd53edb451. 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/ARNFK2036625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1e33dbdd6b325ac7d41f8476a28453bc3a4df273f98413d79cbfe455783f7e. 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/QMDA62482808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df6bcfa2c5455c8e3fbc202968663858c68dde5da43f8c2789e18f9513edc3b. 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/QMFME2408014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1e33dbdd6b325ac7d41f8476a28453bc3a4df273f98413d79cbfe455783f7e. 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/QMDA62482808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a873dbf9ab62f216995f96f6bfecf2264d31691b737d78fafd644caaf0f8598. 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/QMDA62468888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bedf2f6e322d2e80480f4d389d6d12f2af5338cb40009704e5a4d682cbbd999. 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/QMFME2408016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e79f844a608a8f11f40c6325624245db898973f02b8152253046d33282387ce. 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/QMFME2408023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b12d58e970c7131e58b861274be4efdfeedc0298af6ad6e9b2bda40afffc22. 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/QZNJW2532886.