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 0x0eda21aecec8977c95baf51acf4592fed88f7828aa0dc5e87331acaf00f2bdd2. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd6ac4a5-fd09-46e3-9117-285f8d67fb59.json and https://artists.proofprofile.net/proofs/artist/fd6ac4a5-fd09-46e3-9117-285f8d67fb59.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 0x658534163cb52338af3f9bcae066a866e227e3e4e6dc0449d09a3c58759fadab. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBLV62018113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa05d27b04d4c84f97b5dfe9c7ee466aa1fbca30c89a2873e2aa364e3290f74c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRP52176817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c53f1f40fbdb152a6122df795667435fdfd3bc4d93106c9df3d007d69a7431. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMHL2305523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671adb7b9c71f06d3816e1ee1521fde2dc5371cd38ece6a39a1a9de14fef0396. 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/CA5KR2430881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23b41c0439d74de52384c3e264723232853016a446004d1d36f4b4336953524. 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/CA5KR2437490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28b8e0acd55427bd57480cc98b4b2e0ed5146632c6353565b88d8d4d8e28538. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2507595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd3009cde28273c883d73e6c14a7a601d9b1903d3d90833ecc680b0448ab296. 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/QZHCR2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b73454b1641613956340521a67e1b9bba05e9ce10a9240876bce2ffc24c36e1. 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/NLRD52302481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf994ac0ead684e2b84248296cff6d6446cdf23956cb127d025035a9004e571b9. 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/QZK6Q2072528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6f6955ac29dc1c7ba0c5303960718f4c993896a25918ef0345e6d83f220a5e. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/GBWUL1944008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23b41c0439d74de52384c3e264723232853016a446004d1d36f4b4336953524. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:27:34Z), 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/CA5KR2437490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613dc807cdd64d981ff2d0368a692be386cb95ef9c9c4541ae7ff068e2edf24e. 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/CA5KR2318741.