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 0xc7eb8c544e89fa9ed5e35a1a8baaf7a3f64be493bf0aff42343fa06e08106cb2. 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/f64c3856-d25d-4411-90f9-6ea63bb5dc1a.json and https://artists.proofprofile.net/proofs/artist/f64c3856-d25d-4411-90f9-6ea63bb5dc1a.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 0x0189b922ba6031fc5c1194dfc94d57e8d09b0f81ccba8dad6d7d1c9c4da59877. 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/BXKZM2000169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d26e40c65255e326cefc2d963a8f7d89303aca85c3a1593b9aec3af6878e367. 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/BXKZM2000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cba26871da2b58857a8864898d6ab2eefb3fac5fbaee60e976187204d4fbe2. 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/BXKZM2000377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb550649c0663254a836ae0e3980c27b62cf9076cf0e3fb3d7631c6e5adcf44af. 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/BXKZM2000376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b272dd51f75a09d053b165e57724f577b8a931cc011a7f3f6608d474ad247b0. 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/BXKZM2000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c43f2a6dee3368fada77e27c815edd7c140a17972850cba7dbe4de4de0e461. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/BXKZM2000378.
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 0x32d4d781cff27b4d1e9ffdb8a4b64d681b510e9d50bb1577610316dbd9617685. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BXKZM2000375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b30fe69d8df5c9dfe5a9d867e5c645d192e51fd19d39b8aec4b721cb142087. 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/BXKZM2000389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb5f2f7697ecea4020d15c039ebe2bf25047337259997e2761551f0c5ccae64. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXKZM2000396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7081e6474737d7b29424ac1d43275d30b3fe58fae7ae331a0666ef915a7fc6. 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/QZTAS2360564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a82de459e9c979742e9e33d727bf13cc6e143498857a1181f6df6e42f85a47. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BK2242400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98152502c14be5af7fbe71703eaceda9a082e39db14526402977e253e950cc6. 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/BKDKM2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaf9282ddd146e8b09d6b4a7a2944b97f037c1b8d9ad921eca77b156f1216eb. 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/QZMZ92420418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf603a72e956a822ee27568f66eae3b011dfbdfffce308b0f0f16d5d047afb5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM2445301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f7ce7c11c081689dc81178e240a46b9d472a5166a2a56f6cf909a9f4458ef9. 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/BCPAW2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663762b11cb210cdef060028127c95245df774cc726b6ba9809586c36d240614. 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/QZNJW2364519.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa865ec350ee8aedd9e4476ec337a1c00b43c71f35830f5ee749fc735f813cc57. 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/BR9Z22400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ef1678578e1f55d1c2e30cf41942f1e8ea71494c81e09027e8639932f276e3. 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/BKSAI2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf786fdbcb61a4810dc07631f8b9faf1e533fa4b9583249497824355db4ded60. 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/BXKG22401435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58f826cab2ca71b53939fd7a2ae2e7c0604980d949000150783f1048d3aa158. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:37:35Z), 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/QZNJX2484364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ba2dc2ed9211f0c3e225eb3554c3311e34d18e22a65fa994f15c72cd491e7c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZNJX2488907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7f295b8ddaab64b1c9082fb724a758b2ba2a7c7be0b771a7c82a09d4794e1a. 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/BKSAI2400125.