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 0xa842005cfa681d228b16bc898b43885796fc78ee55441919b2a5117f2891212c. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/720c6629-2f5b-4aac-8026-9666386483ae.json and https://artists.proofprofile.net/proofs/artist/720c6629-2f5b-4aac-8026-9666386483ae.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 0x120d8975437226134d4881d882d3e0455bb600738c0d6f1451c7459d3908fb7b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:31:43Z), 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/QZK6G2040918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197ef6d31d5d446d07c71ff6be3e69614b137d82ffa7b88a805abc7d71e736e6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6G2040919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc3288152003fee62d1d3921d5488e554bbc3cbc01f5744d610a9b704cfaf13. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:14Z), 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/QZDA82150639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f024da84a629ecbf15a9afe3c32b68408a217929e1c09ff1be8bb7bac9544ac. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZHN82181572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861a6325a5c29044ddd7c48d1639e38eb8b66546284306d4ae87dfee30a65810. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN82181580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fae66b1727115331fa92b60fac3540ec2d1895f8dcc47da2faed9a54549db99. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:57Z), 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/QZHN82181582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dd62c856cb3c38985f7249ce1735d849ea189d5708eacd45cd17a5010c9485. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN82181587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8438785c315d3aa86381bcdf3ef42919c817b25ffda1119004787c2230067b09. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:55:22Z), 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/QZK6K2211958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecae5387ba651df7e8985ec6c5f367ba865765135d2f5a0f506a376c09326871. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6K2211961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa490242619ba636506537051323ae44adaae95096a4f6ff9b129bc5f0f212b6b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:15:30Z), 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/QZK6K2211962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7563301b333ff488b512af27efc927057ffbf5e68882296ba478aec5aadf0c. 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/QZK6G2260687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56e9caf5f78f72510c13ca41fb5fcf3d37d528c0f2cde7764fdd315425d6c2c. 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/QZK6G2260689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b70999ff78e28931e27158777a049f7d8ada35173a3891f618064328fb46139. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWT2233385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d34f74268b5a9ba266b9a1cffb10a7744aa3ee13a7575c55f14945ef50c758. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ62342742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f54f3eaafeec890323f763af3e1d3c4086578dd9d1aa41c42fc9e3d9f0a9bc. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:22:44Z), 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/QZDA82362393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef59d2b3be1e51aebbc0e8f5d48421a913fa949d1b0d4f06b71ebc10a37959cb. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:00Z), 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/QZNWV2375636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beeea5ca87add38cac025a16ef0b4d6e6453a339b5bcf97a7b69c97cb0a6ba5. 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/QZHNC2462188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e15222599130a9db9f9d000142d17a1d52bb01bc91bdde1c2d7c00d18663b86. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZTAT2420247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eca2cd3dd1ceb4e4e657d21fecae40abc2c8211acb839f2961910e523b1210. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT3F22486663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2772d068bc02aade8d415fdfe8c904cfa9807c8ede8200abf25a67ded41594d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZHN42561581.