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 0x13cb92634fffb3539ccdf017a9b1fb3d55428a42e7e79da22ad85a0b312b4056. 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/bffc30cc-d6f7-49cb-92ac-32695ec49787.json and https://artists.proofprofile.net/proofs/artist/bffc30cc-d6f7-49cb-92ac-32695ec49787.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 0x2b7ce778d18ca3939c7dbfe4aab51db45ff296c88a39062f722467d6308c0030. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBWUL2429847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dafbe0bdf07dd0857f7800e09ca271dc69f2be9a2bc5e021150b8685dfc3bfc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBWUL2429848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f6a9241e80c02dc0b222cc2dbd4a3de609de959193494954e821c6c4a86402. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBWUL2429849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad096def06c5525045389aee93f39bb6689dc4bb3c771955add967f09765d2b3. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBWUL2429850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2005b4009850d799eae3c616996c11f981daf9ef31751925f0a880a9f517f2cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBWUL2429851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c99abe86b7b23e626c662882bf107841e17336d9977f3c491d962dff542d60f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBWUL2429853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967345ed2837b466a907bdf080c0e9a35fd1272b9dabfbb42311c91fdfac6632. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBWUL2429854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e91e399007369804fd1dcc5a4ca8220b03c1163cd7217b03dbf956d6c719ecc. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBWUL2429855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac00d4fb2ab106a89c2806de68617e41ca6f0f75e68eeff1f6b4effc69273ed6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBWUL2429857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881a26105329beae2b7be66886fbb8c6c090582a6e5adbecf671ffa8a539951c. 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/GBWUL2429864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb12d58447c77d469417c7a464b4e597c73091b1c5a8da85e57fad1957d161. 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/GBWUL2429867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b6593c85e6f050bc18303da0f8ff072454053c6152cb5e5db3342900854b45. 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/DEH742423086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f76f36bea78b1930eba8cd541b6bd2c242edb0523dfd6b48a72edca758fe8e5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEH742423087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9830e64c738dfb5852619a74cd2bcf148984337eb215bd59cee369ca7734390. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742423088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb212447dfec6738d134345546fb76c41a95ed9ce8b5c1d9e3a7b90640ae80c45. 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/GBKQU2381328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8a0cd6bddc06bfe87db8c714ad26a4fdcb60f827e566dd950b1aab8d508f51. 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/GBKQU2374087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40246dc76ef6b5fdffb148f10e46a5e95c4332c0eb4e22848f5369506591b8c9. 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/GBKQU2374088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2078435d011323e64787db3b333f52890a709305e7b198d37f301a7264aff0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2374089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd607e786563a9b33ac944b1026442846beab7ef2fb612f02ddde89ffaf840350. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742306181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09baee78324007dc7f60770902d2632edc529626474e7208b17432c8800911cf. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEH742306182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd9e45f9ac8c0aa2847fb02ff83c65ea149947172de91b92999e41dd893e2f8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US83Z2233140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5194c90a2fa240ee46cfdcba1135422896aa6124a8ef50b18d48674ae4f7c9b4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEH742222083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22447f1bfea73577eaf99e9f9841ec7d226d0c2a49980052f17a6c1bc507f234. 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/GBWUL2243932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9672e5d9c2fecf7aac689cd4e5e9cab2c804a1566974f5381ffc1ca24e3f6cb1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBWUL2243945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb543b188c6245e8a9acddf5d81b5e2139be867615028e058ac2584c19b540d7d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBJX32160031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b80276ab52e66f31e9d5ae1687ed7fa6076f05401c05c6309b90b6b575c4fb. 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/QMPVD1500597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936a4265cdf83d249b4c02251e8294b092a25650df0b6fcf900110221befce87. 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/QMPVD1500598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaa4f61de8c3523019e6ee9825e35a65207bc2b219f5c2348a4d2e6decf5015. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA5KR2129048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa2aaf3c2df6ce6418a61ec8f529dba1a75d29840d76a2d772ca18deed9d8c1. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CA5KR2129049.