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 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 0x70335f445e64a26ca8a8fd22a0d6f1e9171dc0e47ba1276539f841b033af77a4. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0280fc8-007b-4c48-9e01-9eb75265d1ce.json and https://artists.proofprofile.net/proofs/artist/d0280fc8-007b-4c48-9e01-9eb75265d1ce.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 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 0x90465bae52bec10eb849b98f2611a5d7138717ddcdccfcb3d09d19da7159966f. 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/QZTB32483487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87661892dad3a03117353da7e57244ef90b764cb81393b56772e9708b9cd3963. 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/QZTB32451077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d191d8b05891bbbc8ddd5059b8870c8fff5d03fc7e8f79b6cccff788ba5761. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZNWR2459485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaf0fc550918101065f5e4add4fad19b84d9ade061b180b2c949eb578948839. 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/QZMEP2435063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad46f7e4951d945d33c7d58e5361b55f66b6f9156620021b7c625fa8109de000. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZWFH2396221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c60af99c18d9a6ef83dc5ec088b7363dd688a5bcdd44c8d4ccb25c3aa55fd7. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZTB72381172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ec13c9587b7cea0bbc5a2cb1dc060ed60f1b4572aee304cd6e2886540db9d8. 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/QZHN92316031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9ca93dbefe2e73452133923f3a4489f8282fee370be2af231b7d3e2b6895e6. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZHN42353469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf158bee169b39a1b748320741e3abcfe3e92fb1a489658a2582e783e39ff407d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZES92323229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76706e4d9fcea9ab6914acb8d16e5ab5b2c95abe7f20057a558680eb2fe6139. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QZES72381785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da67a4eb98f9767ce1747b1f27667265085c2f85aaa2bbb2ffb142166cafc69. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZES72381786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa291d7cb08a29250151cf0a5ea60827e44622ce972d93f627c39b3813d9ed7c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZES72381787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8268130b5e4272b3a76fbc325d3c880e680a2a6699f610f7165c250d172db1. 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/QZES72381788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb848e44dc9761430ed3405028f05c910aba3ca9dc0043af21d2c7e512a66a45b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZES72381789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdda643dfb6da6ba66b35efc1da5c5d9304ad5f39a1662e91822cdeb118edc8. 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/QZTAY2206451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963f589c74eb731abd1f0cc3c87539301a9e996e89cb1900fc0e3026040be5c5. 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/QZNWQ2245379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00a9a87be15e1b2679a67704803979373aa65ad3c02f095828773c0dcf7fa20. 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/QZRP42165812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0afed19d5beb6350320cb6cfe5be689db830f08e03d493739b06dffef7e5598. 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/QZNWX2138018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164b60cfd06e80b3e088e9cdacfdf281b98e408e3821a2d2fefbcb57bc7dba9e. 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/QZMEQ2195454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e8e52fe04a16681150491ef9c34e002a4a7115946d3e60ecd4ad90c4b286d6. 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/USSM12405481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824639cff6b8a8b2a7727ddccccda1ce8d5379ec0763bcfe82c5748ee0b7d24d. 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/USSM12405167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5d01e5a178c2e8b09b2961c6d091936df21b52da8fdce84b95e2456bfa1c76. 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/USSM12405483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa248854f55b8a61019513e48cbcc6f726ed3cdea9e2b6728989273fc2015bd58. 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/USSM12405482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96559ed2623ff1ab556a5b5d8f7329311fe1d992894d9869340cac17caa4825b. 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/USSM12405485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879721d1b952356fb8c0258f453bc25e9d6f5f8a614f6c3bfb8df3842e04759f. 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/USSM12405166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32655f42d4c0cd7d00410f0192720d9265d9b2d1fb50dfaf3c157b232019be1. 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/USSM12405486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87967a6b807935250ff2bd5edd3d103c2b4a2ec41007469da2f8dc0796041ce7. 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/USSM12403517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8b8f49b4ee3e05f53554a284b864b4af52f7220993d9b88a66e7f388f5d775. 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/USSM12405487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc975f5a1acac2f417daec2c24f73a299f5634f879569d4c93676039ef57abd. 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/USSM12406545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaae35f0d64a1374e853953b43b6f10dfe85574d7a5fa662650e035740cf5e2d. 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/USSM12405488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84bd7dc76adb39ff87e3cd871c1916151092ac28036be1ab13ce005086f83be. 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/USSM12405489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4ad0ea0284cd55e3e87f84808d2f60facc7a4d4d178e11adb5159c9a1bb2c3. 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/USSM12405490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40605cc19d9fca064a979bdf4e45d04b56b483a4388726cac6c16f3c1711d21. 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/USSM12405491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693942e0993ee7b434966db5026a6649950fea3b2928897fd06f9e4a741fcec6. 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/USSM12402188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d31ea54d17a6056b624f61fce122d4ebde927f6e6f4a03aa3f0b33fb2ac8384. 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/USSM12405493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805b9972acbbb27da5b745f13b4d1ea30601c7f830e31b1be75755aa46f9a602. 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/USSM12406570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44acbf17e4747ff78a61ba0d57e4d3c6f1338e6caea29767f0d8e267cb3ed78. 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/USSM12405495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711189dc2d4f41ecfdb99894fbaba2c0ef58494eea3311d422538609aecb5297. 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/USSM12400545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872c28a9da97eb21ef3207e3436ff1cb4db58340cf1f1fc6c5e9fef1b026a7df. 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/QZK6M2334299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66778369e3fea631c234c8dc71e0019a854f672513503d534de863e8d63d7fd8. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZTB92256239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4e61d0b53d55be48f20b25aec5dde1c6768d5739edcb422e44c11de99a74a5. 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/QZHN62265053.