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 0x1183cfc0be25bf912ea89450001d05898c0d9d1813ea1660fd26910237e75211. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d5fa839-2d3c-4340-ad40-8e8ce315a3b9.json and https://artists.proofprofile.net/proofs/artist/2d5fa839-2d3c-4340-ad40-8e8ce315a3b9.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 0xe6cbae496dde93cae508707c6eb0848865aa3ed1dedd3b52aa00c383e2d1d264. 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/QZFZ62115396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ae341fbf15ffbc817901dd5045dae626acf61b721551dc3f244149fe0882f4. 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/QZDA52106938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8867d228c8d95b0d2ae0c91352415056c6c1f5417e135d4f97357aa2326926. 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/QZDA52106939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74333a6df21f004c37c023021101dbfce4c15eb73f8fa48b102d60bb19cc1802. 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/QZDA52106943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35160463582bafd82819a64ff2d1604aafb9d1c4ad21e1284620d0bdddb381da. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6J2056919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f6fa3f0c18693dd50ac5a75eea8fe849251e631d3ab5d5780d641514d190d0. 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/QZK6J2056920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df467d72dfdafbea6c31ea83f8775e4cdf350d5d58b5e287b4e918ecf65ba5a. 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/QZES82065476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aad13789ef9c93f8155d3de50eca11fb515cc718862260fdae3ad62fb0aac4. 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/QZK6J2056921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a45a8da78029f072dc09bb1627eb968135e8b7a17dad5222b13286f95305c27. 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/QZK6J2056923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1f8c11bd1ece72b277a0862ca71680e2259ba8ac78ef1c9b9c50e5b7af9087. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZHNA2040337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526581706c5b593d05a1d693f47dbbfacd5852d8cdf8ca3a9ce7586a3d33d0d1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZK6J2056925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41901ec82104e0ac70fc5de65cb3aa83494605a9ac7713146f63dabc40b0cac. 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/CH6542253026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7270042c6ceb1290771b9661556f093e95b6bd778d25f2888ed1024d8d2f49. 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/CH6542253027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14649a2c1d78c8e80fba1b9c3dbfcc93a9060ce0e7323380a3b14e701ad78a43. 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/CH6542253028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f7f23d90d51035c1a64752782e95d525f11a1d9bb29c1a27c63051c61e4b79. 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/CH6542253029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2207d6bdc54e6da70ad26954b65ad00595af681f23cb172c0938a4fcf0059de. 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/CH6542253031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb826c26058724c527560baa32f6fc9abccb482748cc7fa70db2d3a35a1a0c685. 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/CH6542253032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9943b6c033ecf8d9a83c250c54c466ddacbf5e93bdb9dad47fc0bee566463f4. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CH6542253033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555f520375136c12e40960118819d46a27f9504f5fd28f33e1df713cbf75757a. 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/CH6542243788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160a70ca55b5ecac010ba4c9df9453c6f110e5a75b0798bf42829df7a015eaee. 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/CH6542237299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f6fa3f0c18693dd50ac5a75eea8fe849251e631d3ab5d5780d641514d190d0. 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/QZK6J2056920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aad13789ef9c93f8155d3de50eca11fb515cc718862260fdae3ad62fb0aac4. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/QZK6J2056921.