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 0x38ac9ae6fa1ab08c256fbd7520496a061ed74a2939a8a7aa4d9f281e9d1db4b7. 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/76885d4b-5a1d-4d86-9df4-ecf788ced8eb.json and https://artists.proofprofile.net/proofs/artist/76885d4b-5a1d-4d86-9df4-ecf788ced8eb.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 0xf61726760118d98b1f918c6862076cecb535dca1c4a0df2256943859689da8df. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:44:55Z), 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/TCJPC2498048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61726760118d98b1f918c6862076cecb535dca1c4a0df2256943859689da8df. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPC2498048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ef0e3d8e0e95e2b1a99e8d37645206c6390ef67866209900fa3090a1a5f863. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPC2438148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc181da2b856ff753fd1aed63e0c1be581b81da4cafdd09b1f9fc53347d66b72c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:59:18Z), 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/TCJPY2350328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bc05d4eb9281db9d2f654a56fd7e1ee517cda416b22fc9ee22c98423f797c0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPY2350331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa2eb9764fd4790afd798ea8842a531f93c8ad3b12e1c928dc1d20a30e3d39d. 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/TCJPY2350336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb49583b866b31ccf807b471e93b41bd46efbd6cb49ed79b9cd723e39131b3b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPY2350343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f91a9bdfca8b16fe632a05c4df445b44fa54cd9a8859481adca797785f7e47. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:57Z), 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/TCJPY2350340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1a06b12f8ab73e5f4d70236bce41a5a8f6a3df6a86214ae08309e539f0a846. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCJPA2404956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f28bf76ced8803fe1d1f55eae109828e6ccb246a1c395b53244e2c6a386988. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCJPC2406579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f28bf76ced8803fe1d1f55eae109828e6ccb246a1c395b53244e2c6a386988. 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/TCJPC2406579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7b55beb75fe1ced68d9aed3c783b568e5966d18c30645a827f9037526df184. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCJPC2447975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb824cd943bf1a89d955cae85d01a8109adeb0b0d5ec0e7f30227651d2668ea1e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:49Z), 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/TCJPC2447994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddb057f1b1ee342e0577c72f62bac3276d4291ec863885515a564726e90448f. 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/TCJPC2448069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914637e61cb76680c815d12c91b51ffda757024bba435ad418dc0fff900dee3a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:28Z), 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/TCJPF2530954.