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 0x367b81e5f001d50dae0f1058ebc380274b52724686b982ac28832973e3a533a9. 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/0c92b9a2-4697-420a-bc61-b855fd60205e.json and https://artists.proofprofile.net/proofs/artist/0c92b9a2-4697-420a-bc61-b855fd60205e.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 0x75b3d3010a70fe73a73a86ca6bfe0e9f47ff740be06750a9d2696a88ab79ea96. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6P2482336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa276df53d5204e6b1cea344a69875a463a7f119c0f09609dc6c9cbf5811986e0. 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/QZK6P2482337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94cd22b674d4f168b2cf2a5fdf05a770513f8ac14dfa82dacddd6356f4a4c50. 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/QZK6P2482338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a609fbfb2ccac1fd9b1984c2e2602405792cf2cacb2fa858bf0a1fa05efa4e3. 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/QZK6P2482339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c081281f9b12ee722704c2f290abf536223c7d1361f76f2a26993f32b1480c3. 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/QZK6P2482340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaa3d98f839c782dc339fdad0441b6d10928d5aba93e9e41c39df06ea071a6d. 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/QZK6P2482341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe36733fea46afc533c68c85c55e736c81bd4289f16d1cefca2c48f63af6ed9. 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/QZK6P2482342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3115c4c415da6ed80a29550ca228955e42458c7dee1c45223a42c773aa2a37c3. 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/QZK6P2482343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e005cce7e45f93932784386b34dad1fda4e215c1c3e61594731e15a1de33bc. 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/QZK6P2482344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8acfe09e46dbebbdd6064ac16b11f0377eb5d10e473409544a5af55f3d3f598. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6P2482345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fd9210f1fca49059e6f6f3ef33c83102a28652d1e754b7bb794ed89bef2d98. 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/QZK6P2482346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ea917c6466bca86a8ca6addbf82c1d8ddf2b93fe81b7d6f8c7d18c4be840dc. 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/QZK6P2482348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b537c0180dbd88a92779c1c792ba3be669967b44b5dbb2783eebc5def357eef. 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/QZK6P2482350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2820c796a0635a055aa72c5b882f2135a8c96340d1ac0c4170ac4486eba7e4. 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/QZK6P2482351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6fa9b691e9b979242c61381c3e595c9509afd85fcffe0ed331b2d8674c3c1d. 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/QZK6P2482352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a482f33fd540ea553a8110d907fbf01020854302353f789e7d35b545b6f35c. 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/QZK6P2482353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c7cc5000edc2a52603381a688b911efaa28e76e6eaad238699d1529b7bf529. 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/QZK6P2482354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09d84c325653a8fbd5d938f2319c1f5fb146086a6a64d93fc9ebf220bc1bc63. 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/QZK6P2482355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a11e15c58e84e92e35aef89abe3415bad4fb2700f96ca11979dbd01c3b8bd1. 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/QZK6P2482358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e9ba42a2ff955cafc8abaeeb3deba2e27a7703efa8e49f8f2195457a426168. 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/QZK6P2482359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308d3ddbcfe64d119b38fdbf417169a9fb8a6040f15cb3d740bad3b4522717ec. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6P2482360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f5d135cd0c774500fe957387f4ff81dbd7841e3611dd8dd98dd888cfd4b141. 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/QZK6P2482361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700c661b9235919a349b1aa420f1974123604391967707b9e518d16f8c77b146. 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/QZK6P2482362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1154c59cb68191baccf9d66896a1624071ab40eb78fe0748c9b584a5b8182801. 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/QZK6P2482363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d644d8602313a823c9cc79185ec6ede8f36cd8bd926daefec30792b705beb0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES72347827.