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 0x333c957cb9736395db661b3560b7bbd2bd0e963a71e487547cec270ac0c3af76. 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/03bc8338-5563-4b5e-bfc5-75873814d9ba.json and https://artists.proofprofile.net/proofs/artist/03bc8338-5563-4b5e-bfc5-75873814d9ba.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 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 0x4c37ff67d0f0aa0b062aca29bcebced84ff017f2bc4b6ed15370b01ae13dc66c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC0UT2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d3c1b372079ddb2c6c444d39ea9c797a21458e07873a1fc3d75c820dd680d8. 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/BC0UT2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7846080a653a6c6d4e44a92d3449958c93d19c6fb627ce0f8a1da2f210f1c798. 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/BC0UT2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd5a9c1574ec9a5d1eaa9c6021bf0b002e907de246924475c43a803ee2966f6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC0UT2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767567e0e97cc9d9bd91406b3072969668272d0c9c9f938b15ea422aed501e9d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCBA42300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a79603dea11917f4f43b85300cd0ff4d0b976c846a3b61b10f86725d2f8178. 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/QZHZ51987005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e274cca545efc9219dc19aca448415d736615e302d4dcd25aead6a9f9fb75. 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/BCBA42000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b785bac14c7b0c0ec8d3b5348eb1f6969677dafb72d59da08569b06eb0d896. 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/BC0UT2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438d866f5d20e0798a57c8e076e9b65b899e26b33ef6c05d082d65937cdf1eb7. 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/BXIV81900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab5260b0a9449a4f73f8f9b0134c330d3dc815bf29e8355061e332d809e32c3. 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/BC0UT2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8255294bc96a612463e0ebf892000e3048edb2e6f91ff676f9ffb6a106f712e2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCBA42100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe737e81222083bd2bd37ed50e1bd872c4ccee82a58b75a26d001208c48f67044. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCWA02100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eda443bd032a3a08549f8c323ddbdab9cbac8182869d810b208da64914120a. 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/QZNJW2382739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffaab8d6b0feb6a06e6bb8a01ad879b127d5d02c02f72a2f47c3a52e2507e03. 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/BC0UT2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ee26310275ad2e4974fc62bccf82fbd4ad215451dd168f2b101d51d7d66026. 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/BC0UT2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f531caa9686d9b8b5ae580066151fd0e39f536415b79a0a8b8cb0e2b98ce395. 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/USLZJ2230561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e92611477044a197de5f6ed7c6d7faf95104bdfccbbfd22074f2e1365dd3dd9. 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/QZ5FN2273820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a6a4e7773249757123138dc002a640af94635fd31f80b57b343775ba39d393. 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/BXWY82100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fba2dd51ab6929524d01e6f3dc45f40cccbbc51e14c9972902efa2d32c2c384. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCBA42000015.