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 0x6d39fa9e693edad5530047fde8e0a6fb785a9c48cfdc62683df13c20a5254b46. 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/fa59b70e-373c-40f5-a1ca-3b10b6194ca2.json and https://artists.proofprofile.net/proofs/artist/fa59b70e-373c-40f5-a1ca-3b10b6194ca2.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 0xbe93f7ee497ca6d2168027ae07a48723976d4ea57a25364cf9b24d358e2f804c. 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/QZLQR2054382.
It`S All About Control (Black Lives Matter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83d9d017afe8e7ef15f14550b1a7f0f4b5988bdc0c90893a206810045ad9cea. 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/QZLQR2069347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636ea9931bd9da5af3f01e2bda050637af232b9d250132a03eab78a6ef767f0f. 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/QZLQR2047291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770285277c6ecd413df1a6ed4c0282f7baa37c1867213b19e5d56a8003907928. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZLQR2055306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97edcdd49796b54fc38cfaa629d302a9305191cbf768c00a38616e9bd2094bb1. 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/QZLQR2068318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0e104ce6f217d7597a6a81b8a1ff277c4f4f235726a87a94eb048b1c926bba. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/TCAHQ2315548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fda4a4c5e636eccc2d0cb4f9eef8a549c6f13e8d6eeee5a591c7380304fde55. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/TCAHQ2315108.
It`S All About Control (Black Lives Matter) (Spedup)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a56677b2b30d4e36436c290bb6e53c64424543bcb54b579ba2369ab462e99d8. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCAHQ2315109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20d8df6a616c4dad78216c88b278538fe2c8343a2f998f85a90676c55fb4b14. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TCAHQ2315119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2923a6ddeaee910df64035bb4c7e6ee29c4be7e2b257c53a6c238307e09a901. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHQ2315120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827a76454df49d343335ad704a49e6d4c325c07e58054ace45d9e22cb1c21779. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHQ2315126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81875865697c8a17f6326afa482cd21d117d1722dca72a69e0e72327a4474daa. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAHQ2315135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed3cab989f3d2c76ea723ff54a9efe5dfe1df723a2d2a7b627ac69c2d2682a1. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAHQ2315140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff03fe6d87ddc641ebc40e3ec60dc02c8419349e979b9dbf97265a1bb5bd05ac. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAHS2356964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbec766424dcff9dd0845465243f85257a4e04c2308f43d1465673b9aedbab3. 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/TCAHS2359620.