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 0x2cf7fd82e248f65f6ccec12169439fdad02d3ac8b77076aca78b427d1c637e4c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c073bd61-3a26-404a-b775-e4cee5a7d830.json and https://artists.proofprofile.net/proofs/artist/c073bd61-3a26-404a-b775-e4cee5a7d830.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 0x71f487e729521bcd4e4fa7ed1cb6bc3082f44cb8e142aaf5fe6fe22d8fc844a7. 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/ESA011933781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234eb16218eed3fa6556b4021ee900f7bed8fa7a926c483e190501541493e440. 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/ES5062308001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356dfe05ae17f0c972cb8f0d9c426714a0a129c01b628ced9431d06b20c3da3b. 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/ES5062413001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7eca9dbe955aa19cd7e557846cf8d6c54e0b3f99051b9b69f0bce4efd6b436. 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/ES5062406201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecf3e6fcad44ce3694ee97fb889436e36d176264c8f975dcfb91ed3434b080f. 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/ES5062410301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4390bc781bf42df7544632121565c6a02fadd67be98ed1528d4908a4795f9. 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/ES5062413005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf596114126cdbf1f5dbe1e812a27aa523ccc4dd80eb5d248cf245f2b1b183f36. 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/ES5062411001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fe6ccb6359c66e8b5397cc2c165345841daef4545a4d0152130b6df9542a1e. 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/ES5062407801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b0928bafbf9c5e0c2c5cd74af6416838b1896910ec90edd72bcd6caa29ea59. 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/ES5062413007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbbd5143ffb3a9df5b71d336e587dad14e7bc8313c154a92cf8e1f85376d018. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES09C1700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab58a0a2408338e1896f0fa3593d2fa6f3fb4dc6feb1f33c3809f33108738490. 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/QM6N21756362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf266b967d34ef5beb98bb813203fcf2a14b333034e73e7a58a613db62c5e06c. 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/QM6N21756363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5548c90432529645256f89aa74fc571f0fb50a0c2e12ac7d02794becb0c7ee4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6N21756364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fe994011c08aecde2cd64c543adae6f52577a3d8fa22dcf100ef5377158bcc. 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/QM6N21756367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ab457af020348e39a87b4f20d106d552b7921f67826093d56cc8d7debd79cd. 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/QM6N21756378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7174930d86af2b4fd7b07c2d0ae2690ba986bcd66279c1957a5878bef0b28019. 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/ES09C1700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8492ddcccb2399e08c65985ba823ab3c64b9dc82b06cdb875285079b3ed88cb2. 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/ES09C1700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e242f57801aaf70a246e312dcf01abec19ff579dc787a61e3b9241d33af036. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:31:37Z), 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/ES5062413004.
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 0x335ca131c444a5e2d8423a4337e39d6eff1df9af3802aa5d9954cba560de2586. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM6N21756365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80495b8121058fea6c5e29e310a59f31a2750b8102a27291356036cf67507f6a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES09C1700068.