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 0xfdb8b8abeccce01bb4ab72f2ac578d546c9a45734434880ba562728b02afd73d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/709567fb-fc8a-43e8-ab02-fbd2407fff6d.json and https://artists.proofprofile.net/proofs/artist/709567fb-fc8a-43e8-ab02-fbd2407fff6d.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 0x67a1cd0957d30557191e94bef00083c56413974de2806a746e4f96a861b480a4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CHUM71500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc03a6ef13ba517910a2feed2eec7fecba6162d90e4ed82abfe2fe4c50f45412. 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/CHUM71500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54941f1699956f735f550527e4f8f8e4ab9ddb5119d525708a0098b05ab57866. 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/CHUM71500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3473ae7a8e21c1dd26c04f74b01e48203d1565fae265146c2db9e5ffa4919f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CHUM71500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3141388fe48a39e6a9c644b896ff07f73f3bd8ceade5c0dfd406e6d9f87b8e55. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CHUM71500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed1e2ff72e0fbc12901be1f976658b2f9f002c9d308b1a1fe047a89e6bed154. 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/CHUM71500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24df20526630bbf5bf59e9b0879d3aa657df597ce961a17b29a51763cad9db8a. 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/CHUM71500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9795bb94cd1968a0d3ede57717890503a9c75a6a3ee972b58a73dba2d8c1a5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CHUM71500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fc619ad4dc89c8b75e0b7359242d91e45f96b796d115e55779ca488f0b4fa4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CHUM71500089.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adbe43ab9685cde432e7fa47f4e114ae10adf7cd2c8529f105269d73c3538a5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CHUM71500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18213064902a1e5e50545f741ed28a634e37f651efb94c6affb0940935d57102. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CHUM71500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c33a1df0a0c6c0ddf3a98568b8b169016ccb85c64221c7bdba1c93ff20a24c8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH6542448382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390cd8a2f00c48c4661c95b159a55df96b92ea5b67d7d76758e05232f42445e3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH6542438729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14841fe4407e031e9c5cc24559398d069d2183d0cfe315a905dd8aa7d35b6450. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH6542424713.
We Just Need A Little - Ofenbach Radio Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42544876c66b5f9aedbb9d43f63156efd9284e37faf0fb427b8bf428984eff27. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CHUM71600210.
We Just Need A Little - Ofenbach Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768d65d60f745014443fd99a4aa80c797e6928c931aeed0c41ca10643be96584. 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/CHUM71600211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d91aafddefe3c2159aae301a3081fc77d86cb0edd03e28771332e6a0986dbf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CHUM71400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1058a702b3857b5d12eb1273d1897124a9f9ead4bd2d9213aaa9159f39cfbc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAGOO2445078.