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 0x4867feb6d4925377370c0d1a00f3a346f1a7bec0bffbf588b6b6bd316fcbf333. 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/4f0f0338-5bc2-4a70-ab82-a1413b169b21.json and https://artists.proofprofile.net/proofs/artist/4f0f0338-5bc2-4a70-ab82-a1413b169b21.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 0x9f3c0874f7aae068eb836f768d201ddc05886ae74652a52cb23ebb5799696340. 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/UYM122400460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cdd4f63ab760aabd52596929bccab2d6fc04f787b5b8fbe9a77973c27757cb. 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/UYM123002498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d87444641e116ab4dd5a556e64f0ad0ed2ff3f59c842165398d5b0b4a173327. 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/QZGLS2394405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8530bc7955c1b48e807807dcddfe774a64b419a32769f14d07c1bbcd3e03510c. 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/UYM122500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3c0874f7aae068eb836f768d201ddc05886ae74652a52cb23ebb5799696340. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UYM122400460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406e9d9c28187d01456853bf8c39bf4f5b6dedb5c8db757fa163adad2f548a5c. 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/UYM122400592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe997e850949232921b70dc6dbd2bc0fd144a62e32ccea46d85007462f431fe. 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/UYM122400515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374311d3fd8d54cfe4d317ea5d9a6b6e6372e8204850b5b6553534338cd00a6e. 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/UYM122400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9888b2ad01524c71b14a910389d18071694ba94ba2f418cca95b30ca9e4cbbc3. 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/UYM122400591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005078cbc8c9f51f4262bf14a65fea9d66ba14fe95faae90dca150a9af922e50. 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/UYM122400593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77290e3a526a74cdb2d81a8271d939e28dd2a2e63c7c454ae2aefadac470d05. 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/UYM122400461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d0b9185372d389aa004f3c3df0dafbf589c6543cff2f2e40bce47004942147. 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/UYL842400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a50c189af0641f3384918ab32e412c8ae65a77113f41c8fd30b40c7609b3ef9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/COF012300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248b94d9dc15c2429d4ceb7410369c8f34a4bd3a169a7b4d59e880e782c37721. 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/UYM122500001.