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 0xbb80711ef8b4a8b11ae18c88719711b2f7a0dd505533209ba4e3ec57767d912d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5245737-b87f-46bd-acfd-9b93f128437c.json and https://artists.proofprofile.net/proofs/artist/a5245737-b87f-46bd-acfd-9b93f128437c.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 0x8bee403053b0e28cb6804e5537b162523e89ca3334c4a7ff4fb342b0a5bd5d28. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZ8LD1979595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd730d68ae77d584eb88da4fad1e0e0ed36d0b2c6b7fa61aa3030080b5006d474. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA41928703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bee403053b0e28cb6804e5537b162523e89ca3334c4a7ff4fb342b0a5bd5d28. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZ8LD1979595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ec5e8e149938aec49a6f536afe8eac8aaff1d8ac1c2df7d42a8d14d409a0fd. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZDA61938543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bb03e5fe21dd34cd44b5b7db91540a467aeea69323ec853d445172be2a7ec9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ41904956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea966c8fff87f083bcc2d2315abb23c6a2cb4662bf016e12cf6c44959ea14e7a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN61912076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676f3ba29ec7d83c5efc4eb351b9a77745b7dbf8aef0e8ee156f479d6497963c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHNA1934694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf0509feceb4fdef3a51e099d93bee40d96027e3bf1735e58c023c6aca0359f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:53:42Z), 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/QZFZ22050133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f57fbad23febd6e531b43a3594d401e0a7d2452bcccc189ebe3976385cfc9e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA82013810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf8a0ceee6a0faaecdb035d00aa3e786402bbe64c0064d09d74c69ed1afb0e9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN92062528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cf84cbf57a3c310c0bc16c9d18aa69a0c1c7e0af6025099dfabbcfc4345b8d. 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/QZK6F2064813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683714ac762f17e5e9479e3ac8f43c66964e958a1f880a507b4f75f0124dd4d0. 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/FRX872119936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899d5802a7cadd247624fa309193c42e63e190334a37c3c4d73ce104dbfdf2f7. 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/FR10S2221934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a9cbd2df2761dff29dab6fe753624ec25eee50a15fab0865e3e8fd42b772d. 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/FR10S2221937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fb97c1d0ae436c4d158f6e8f33200f4cb48d5b0297cb4d94fb185fac0d531d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAB392303883.