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 0xaa3d1a4d392fc709a872a9f475848766ffcdfe79472fd2ff088db85fdb4685c3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d549c08-83a0-43e0-8cf8-54348647ade0.json and https://artists.proofprofile.net/proofs/artist/1d549c08-83a0-43e0-8cf8-54348647ade0.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 0x5514cf0a887408d8f138eebc6b37ebbd7f9b744f73e84acaa28d6730a3d29feb. 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/QZFQW2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf367230e6f107d4ec00394cba5084b024be44cd0e5be470a8db6c103a3307f63. 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/QZFQW2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8bdc226f225c6766333012718a0909cb16847a946a00da5ae64a5afe8c3c4b. 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/QZFQW2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc978bbd445e820eb667715003db1b5c850ade7a4bb989f6f9f7e62fb35079ed1. 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/QZFQW2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29378b41d297e8644389e960131b4f8b59d239b10fd7f76c218949fb5384796. 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/QZFQW2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2603af6535c8273cf591fd7bf3b23877625f2dd2fb69b79fe0ee05420eaef942. 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/QZFQW2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8364b231dd196b069549cfe63a699e80bacb2d4d0c9c9a8726cd2ca6238702e. 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/QZFQW2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5296e4da2a01a010f0c15ed8b5c029d322e13b69992858f5f56fc1291a3dcc. 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/QZFQW2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d310f0525adf1fa7145ccb6b746b92a983be8bf7b8dc69ec10134211f84035c. 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/QZFQW2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ae95e87eeba7b1eda8c90b0b1eed02c158dd96244450c3119cb422de95a938. 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/QZFQW2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d22c2e370aec63ed429460c91195e65515ee024520f74c63a79308add0093c0. 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/QZFQW2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b989f93fa32d8b40b565c94b06bdfa0873c951ad79fd903856fdd98a1f9493. 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/QZWV32378796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be2a5740a388759f9a49163039be27d90e4e8fd43e52d9bf7cefb85ddd2fedc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWV32378829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366b3346c3bf8e1268270ac032810d86b02d20043197c01ea3fa9110b5ae9504. 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/USLZJ2356801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366b3346c3bf8e1268270ac032810d86b02d20043197c01ea3fa9110b5ae9504. 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/USLZJ2356801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d22c2e370aec63ed429460c91195e65515ee024520f74c63a79308add0093c0. 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/QZFQW2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92dfa17c00359f5bdabff93c35540ab2abade16799ab2f252322a067147a778. 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/QZFQW2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf200f3d7d79338bc4da19c8b60f0cb909901597c64c21a07cfb4f3e3c825ee80. 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/QZFQW2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2905561603f40ab476852fad51480329eb9f7e6e975d6914276ebd9c0f9603d. 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/QZFQW1800001.