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 0x78db7cd388b5e04fa33cd8d12372020fffb5d296c92045cb4f7235525f09d9f7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c7bcd97-9714-454d-9452-07e6a3ad3bb3.json and https://artists.proofprofile.net/proofs/artist/2c7bcd97-9714-454d-9452-07e6a3ad3bb3.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 0xd68c70945a4bec21ca35fd7d2bd8997d57524780a42fec814f6152f591238a0f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKZGC2307417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e54a52bfe9ed02df584347364b8109db80028d51aec9a09c827975d6d6703f. 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/UKZGC2307421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cf335378b0a46ae25234cf7dc4ba21ef8fc72e031ed0f56f289b0158e8e00b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKZGC2306503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41261589aa0d44aa9f50559951634a23142968e2732dbf51f3955de8a457209. 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/UKZGC2308766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489e09b7ab0fb30424a4bb728f93d041be52957ab5f1cdffbf4b4230e19e9a19. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/UKZGC2308767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ec5012ee901796e0a5fb91ad5d9c742d77faa6e52c88dc510d840ecf807f35. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/UKZGC2308768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc55449206bc7cde2f61ae9b7af1e33b5d567d9baf2ee4a818b85813a9e4dff. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UKZGC2309965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec71e2ab4fc4bd8c9bf59d65d687fada5e51af707bec273b54209a339459e08. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/UKZGC2309966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8c7f241a204643870e6690f17d4dd4f3798b637f37b3b90e1a96eec60187fd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/UKZGC2309968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a225d78b0fd2de09ff7c071ce8d3f1dc5034d32bb04c57b9f36ceaff3aafd3. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:23:03Z), 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/UKZGC2309969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a1b9dd4da5e5b67c817f296785ac9e41097af3aba702eb0525f73b86af366b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKZGC2405775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdb81cbca08a0339069f5bab977efbecd5690b48343a47062d9a7aff93d54d9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/UKZGC2405776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71999d35e87b1a32c9267a471256f956c878efb94f60e570cab287603cf5552. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/UKZGC2405777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47103487e4aaff73d545ffa6d4fd3418ba768287324faef40bee1711d70aa6c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UKZGC2405778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c55a14ffeb0f16a25a79506140b053197d1ed15280367b34524f13544f07676. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:21:03Z), 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/UKZGC2405780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a728531eca855c05ba6c6a63c27b6d48d1e0d89700e94c8eb165d941dd4e01. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CAQOI2414391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb31f64dd75cd359a409e2f667001032a302ea2a6af21d51100659afebce29ac. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/CAQOI2414392.