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 0x8f8adbed0707565bdd0c0c6d644b2606368b7cede8d7e1c869da04fd9718bc19. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15595baf-91e2-4791-955a-ead002ff5987.json and https://artists.proofprofile.net/proofs/artist/15595baf-91e2-4791-955a-ead002ff5987.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 0x84c5204bbfda9d1cbf016ae876ea960e420b9cc4919d48a272e8556c59932bc7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:20Z), 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/QZES52077794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6ce93b42aa8724ff3fd963d7c2f2202aa4f11cdb638168f0031706f7c4de07. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES52077797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e53062a59bb7b7f7152307e3c2403fd30ff2042eb7a93b201108ab32e61c71. 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/QZES52078793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277f9c1e6f28929fec22b55c7823c1911fd7e84330f0128758c0d9209be40688. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES52078794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936b2a6273849642ca183071330bf2a6c22ca3ea9f453ec2a3176ba06a0bb503. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES52078795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d665b83fb3dc1c75c222cd6d157614a6aacfb2110493373bf88d4ea246d1b07. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES52078796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0eb6f0613637c351d84fc5cbcc1902f0706fbef0158e01973e05e5ac2988124. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZES52078777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1f6aa81cfe32de423c27c9f799490268265f173083b0969356bfb26d1318b1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN42181905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1327ddcccb667a50831c2200b9c3f63e9a590fd9c12f0ff8abe2a65bfab96a62. 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/TCABM1337904.