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 0x25cc470300fc8215e8c5c19a6e483244741be16fdb55dd05f7ada2a2d4de72c3. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60079467-ba6f-4809-8d0c-5e76b41c12a8.json and https://artists.proofprofile.net/proofs/artist/60079467-ba6f-4809-8d0c-5e76b41c12a8.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 0x29f91aee6a05c685cc6e8f8497ae9b48d6b3fa13cc21cb2cc0f39ef475d399e1. 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/QZRP42223937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a60d85066b0cb3e27950960de64f660af322a78a43d74a2778b803930a16846. 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/QZK6M2550242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3408f118e46b7f58a86ccc1171ed265847220cc9ff1847017ba78c307e833de0. 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/QZTB42441494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5309b0a10443022369af90b79463ecd90d310d5a1b2cdd4e6a59a2847dca85c3. 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/QZTB42441495.
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 0x1aa75fef15fa93a503b4fe015af17e159ba3bca31bde7a1930cf0200190b5c4e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTB42441496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78992fd5f2d3000019943247e52a90c3437583504ad9877fc3656091ec4d8b2a. 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/QZMEM2337967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09207e303f4ca291e02e88d5a07e1ece9317cf342737894e8afbeaf502b4c059. 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/QZFZ72305843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66253e68da4aa624825c8f85adde94f0ba054af830704929174d44032df448b2. 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/QZFZ22305273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8387c2b3227cf7c7880b7efb736d697440963ff1dae3e7c82c1fec9994df582e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTB32267941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431feef9c16ee1fa4935fb8c2c075772d05c560f52fac651d9bcefab294e70a5. 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/SE6XX2292359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d5017699b20a5435e8379e62f2c269d29065755c4dfa5e476dc6c4fe2561da. 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/QZNWS2228920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c79783512b179502a19236f6616abf6e2c9e6240a98385bc91027ef801641a. 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/QZMEN2214192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720c47a3a003d59e9e63f0b3a55d693a1d0df391e3280d3ce45d10dcdb75beec. 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/SE6SA2267309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308fb4928a022a7f91e63eb41a694243e0b10ec6b76d2773a11143090dc344da. 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/QZHN92237254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4278d4684dfa20f85c596cec70027f5e94f06038554ecbea4af7dde8450e5033. 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/QM42K2203070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9082bb61a010fef6629831a80825f2b99330989af549d3af426bf24d69ba072. 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/QM42K2256522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70124fe6b644236eaf084042511a1ad3c2c3600f3ff45a82429e3f574fac99f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZS642148771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff0b979140c355d3cf97db13d371335671c496de0dc40e7639f5f56d9704ae4. 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/QZS652143576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2624267465ced1500f26319a9b60b5d788da1f3e78bba79c94f44cb881a1bcb. 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/QZS662162124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af87750caedcb0ae5c8316dd24aea7a218e9ac811a79d8c6413c2fa31d0b5ea. 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/QZS662116851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1620a666df57d5a4f1f76baf6779736901c02b4b57398e32d20f54f1fbad7b. 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/QZS632180701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01b2a8fdba75fc5b713035dcfa68fdba330e5dcab75997fbd6784a670ab66fd. 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/QZMHP2047547.