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 0x0c20d2f70c5b0da9471427efed6f1d6d303e6a70ca8c1f5f41bfe731510e2d34. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e81adeea-aad9-4ec8-954a-8196d8e976fb.json and https://artists.proofprofile.net/proofs/artist/e81adeea-aad9-4ec8-954a-8196d8e976fb.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 0x1b61a0ce84ea10f51d2241fced62100bda7a38e96045aee9b68b3e80dac4ea7b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPY2340580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b969c283acb4c2ce9eb2fee2b7b924d8862e264c6512e2525c03038c40d995. 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/TCJPY2340582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5ad497979d6063f3fa484be1327d828536a2642250830f2c67e6e4f73abb31. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPZ2456837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc121e71fbf6f0b7890362a1732ffb19f14b12c070983858e0be445744deeb9d6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPA2446267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e68448e3fa4301659e70884c688e05467dd1031fce983afed821fd1c50f019e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:03Z), 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/TCJPC2400499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48570c8536ea10ac39d83701816e3942b92cda33caaf5efacdb65dcd9cc4b33. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPC2481367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4604a77c3a78f4cefcfcf3aa95a8436eee3415cc142de35f2a39dafb129e0de4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:22:43Z), 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/TCJPE2572353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306182c7e96b1e9f696a6e574a97b6df8b70c1a22e001b6f2138484745ce9501. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:59:01Z), 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/TCJPE2572370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aa1bbbfae736a47bb8c523ec8eb96fc560bd045c57857494954e3b8ceb85f1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPE2572642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac88e84a057f5058de7a77bceca24e9585985336ab3b987cc76b6cff9efc1cc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPE2572645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c319616f33e5f09e6af7e14b5bb33dcf8a29e4e5a13131e47fd47dce7c044c5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:39Z), 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/TCJPE2572652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0773cef949ec3a4d82510292b60d8d2efa196fdc97661ea9a4980e70a1a44aa. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPE2572654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa7c7557fcc17e76c5a74e54c1948bb65dd6906eb9082ecccc521702bd5d45e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPE2572658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c5cf31aaf1a8aa291aa9305def5df53b1a5e75f38d0fa01c994cec53ec7646. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCJPE2572662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a80e924fdb84571882b9f453ead5cd9fe55e9ca5f2eef66f3eb389061402d6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPE2572670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2052bc4ba3526571398a9b631902b7c2a99e34e8e8a1f778501a487c9f1c2fb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPE2572674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6206081904bd0abf51cc84a46d99b4c1e1eb5f6e19ab0261251273769382a3f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:09:04Z), 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/TCJPE2572677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818c3001a5c590b833760aaeb771e6313289816dda0a42ecf90c8c3de86b0ce1. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:29:55Z), 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/TCJPE2572701.