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 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 0x8886107e996bf3c3343faa14f317fe15c6f87f852bee1e3bc8af0884e4ef8078. 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/fb5faa98-1d9c-4437-a581-354f746e910d.json and https://artists.proofprofile.net/proofs/artist/fb5faa98-1d9c-4437-a581-354f746e910d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
If You Only Knew - Balcazar & Sordo Remix
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 0xa2530d3d7fa213b755aa8d2dd20e82ff0444954554c32db277abb51594363648. 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/GBKQU1804745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd1356508e8f35ab9c689a29ada055ce528e8b939d58da00f8057f6f09781d5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:53:31Z), 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/UKFMN1600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ca335f28c2db6f0ee7032d45bcf49b7358840d1d8bf0422f55e419091e5750. 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/GBSMU4268777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1559230f3280242241dff609901a87ace0ab9cc21c25db4ee7de124013c5941b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBTEZ1500952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d0e054b259ac528c9901d2815c04216b3427fe36287757084c50aef3a231d7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSMU4268754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0db53e462ef29dc727ce7cd7ff193447bbc70f0d931edc87146b5a6c9eb730. 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/DEBE71400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad9a4e422441fa3ef7ca9265b3d1b90aaf64af32a24cb1775d9179960af341a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEBE71400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78f8bb58bd5471c48af552a3fc565d24742dd73ab5d6d7ae7bff7832d0b31be. 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/GBSMU1518270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf74c62e1691ba4be681f4942c67b6e43c953b485c55efc02df5f76d3c5327d. 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/GBSMU4268731.
If You Only Knew Remixes / When It Rains
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041072a5e74b35265a06b04b3707462ad41236f53848a20f8b9f9fdf3401b0da. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU1217945.
When It Rains (Digital Exclusive) - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb4845a40c22054ad8cf626e03f3c128349ed2060363095e38b0bea1e803ad0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU1217948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928ceadd60de0d9c55a7ec2cc55ccc13c42c8d872e6e49544f368e03a412fcdd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU1210135.
A Little Somethin Somethin - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86bb840d344f517f760506f82084b8e0022cec602b9ab9a9b02b5b534c9fb69. 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/GBKQU1210136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440a16937e9ff90e7b344135b316bf43145ddcde67d6bb6294f7926346f009f2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU1210137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf5c305fe3de680b362bcaf7b7f9dbdc7fcc91112e29213d63895b910d7ac17. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU1210138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccecfa0e1aea00d5647eee966dba16865597ce46f3a2f878d0e886648f6fd620. 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/GBSMU4268716.