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 0xf6dc537284ef1d8852d2230985528a4783f3496536ef474bab179bec08ca8db0. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de1918cd-86e8-42a7-9125-91197c6fdfb0.json and https://artists.proofprofile.net/proofs/artist/de1918cd-86e8-42a7-9125-91197c6fdfb0.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 0x3a1c18ff259160fe8f36f13d89a3a79a67db1e4abc9afb256cb90a9239a0f435. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA42004560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc0d2361982bb114a64b97775f33f06d2f4019f29cc8fc24df213b3b48dd69f. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:47:31Z), 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/QZDA42004561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f442454ce6a6b38546477c611398be2e5bf4b2a01d17079c37c10c9455d3a4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA42004562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4529e7aae682fb95214458525be2232cc890ec1c564a0c17580f453459567531. 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/QZDA42004564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6ea99b7b3d26d48f582e9ffbb44c35202b3f769a1ff4141d01d176f39018b2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:52:55Z), 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/QZDA42004565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3c933dc769fd18984c7ad03d4de0a6eff19ee9cd788c64026ea449576ca4f0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA42004566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a8141264d83a78329bf032cef48abf94474481edef8036976386b0348d924f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:49:08Z), 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/QZDA42004567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf616ecb6439a0f412d6f5d747818b949fb68ffc8d5370c2988fa8df43ea54eb5. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:36:28Z), 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/QZDA42004571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02e3d75eb29d97676f97b1941f42754cb49d60778715838cf31cf237d3d03d4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA42004572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7357d0636b5829d20640b9f502fb12e17386ac1488a5c784a43265e49af7d014. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:56:27Z), 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/QZDA42004576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f7adf58b9e9cadf75ce1711546941d0c61807cef2a7f73bf64ca921f00e3d8. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA82294329.