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 0x3b6ab2387f2e43167b7dc2550fd498c37d26a4cfec9ac3a9051ea21018109bb3. 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/ea60d74b-4a0b-486e-9d10-b3d9768f2ed6.json and https://artists.proofprofile.net/proofs/artist/ea60d74b-4a0b-486e-9d10-b3d9768f2ed6.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 0x6462c4dcf5ceba0396509cd7a45ac9d0c3497c7d0ea7e0461fb6731aa5652a6c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZMEP2185530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd264f7c8fedea5d18f8b55c9f53ceb6a0e22bcebf32db35a46172fa3d67b08da. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6Q2246656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149183d56bf1699535fbd376cb8424394311230892b32158988600f3bbf4889d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6P2245227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341799cb46d6d80925e610b04d738645256620c9762718ebf8379eb2fbc14fe3. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZK6M2258583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf23e343c24095fdde22d47326becaedb0414a1b866bef1d5e8d70c004e52c4e. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZK6M2265502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a7af6d6fb46c840fc27807672a704c010018b6e36fc03d01cc387eecc9743b. 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/QZK6J2283692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162d82d176591abbc24cdbf960bf0c891bef3df89049870b378bcf0f22e1c372. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZMZ92324422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d77ec4e692f648c5b4297cadaa9b25a7b7c9fab38616541d670597b815e4807. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US7VG2419814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d660c364244e4ab75985bef11370a314949a22f197eb2ecea7751ba6c51b350. 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/US7VG2435810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7473e5ded4d3b5d04d5efc9cdb37692c4210800d1c51c8669dd272d4d300c44. 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/QZGLM2437845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd7cbc335d1debbf751b6de7c4ba4e43269bd2e4e4c03a56a4b6277139a6f0a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNJX2560243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3393990094102af8b8f4f9b5e9297d2eca7dfe73365c0b0497ab83d1bebfd1ae. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZNJZ2534121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036d09521fb28badc9277fd7371344e76fbaabafbb628d2be2d61ad602f88c68. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:00:43Z), 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/QZTPX2576434.