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 0x290b36ad8d4a80c6df18704b54755f716235cbad595deb8ccd22c275896fc0ab. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78f242a4-d562-4d76-b530-6d907094449a.json and https://artists.proofprofile.net/proofs/artist/78f242a4-d562-4d76-b530-6d907094449a.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 0x6c101a23ecaa204c7cb3415e8bc24f62e7e2ecf5341ec0d43057b3e138759391. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6F2026264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85cc7c0c51242e91937ffa95a829a52e78e0485a5bf7514ca08d19c8896ef06. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6F2026266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9f2431c06bd1df3f0af1a40a071684157a595b3e9b3819f374e8f1616c302e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZK6F2026267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5190fc36c4d44f1de2960042f7cccbc7a9056e21e4c5254f464bd59aa6a6db20. 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/QZK6F2026268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab6357a2a8fc4990b830928f89a1ed36619318f1f9506eff7b07f041aa845a4. 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/US3Z42000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b579f1182d9ddcf7d0350a479cc96a5bdbb5f2e64249e14a2b3990cf29cc3c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US3Z42400097.
P.Y.I.T.F. (feat. Gawvi, Spzrkt, Rey King & Social Club)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a088a8b6035b185f55cb8e55284d0ddd9799a177b65ddddad5aa44b0fcf3bcf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCABQ1394041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ec5044488bafe4f47b9257ca01d24f73e3bd2797b9c96244e24567f0b195b2. 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/USUM71915672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ec5044488bafe4f47b9257ca01d24f73e3bd2797b9c96244e24567f0b195b2. 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/USUM71915672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adc62cfd10a0faefe7a8f8ec555ea6d550b2be6ab978176db85790c75f4f292. 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/TCACD1566692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be8f52caadb0db93431304ec67b17e5ddd7501f58261af8ed17e298d2f032c8. 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/TCACD1566701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dbfd5a739ae0e6113f2b4f2ec760cc3ee35214e7e2742412632c350f089678. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCABM1366723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94210a670b2af5f51c0ae32bac61bd06c1e906b2d00c00ac483c960c49a6e4f. 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/TCABW1429160.