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 0xbf2430cf41fc431ac12b903987e63cfb07c399593483dbb66ed8dd95b32c06c0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4426e10-8ad4-4ba6-86d6-ecd61cb9fc6e.json and https://artists.proofprofile.net/proofs/artist/a4426e10-8ad4-4ba6-86d6-ecd61cb9fc6e.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 0xd668257aee91f35c5b0244c5d5b791ff01063e71acefede1a0bc677ca7821edb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR10S1564906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7a377981e47ece7775faa6510f36dd55207a95d4ac7122ace6eb56015d9503. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US83Z1529730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e3abc74ab5c6036129133d1eb366d278a2a6b2114d32cb8d3fff0824e40490. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBKQU1659311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd9bf14b9b09ab1b20f7721f00a1d1af5ba950602469eff69b0ddb5cc605f88. 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/RUB521205501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888d67a6c37f79a567b7def1dfafea899d352104cfe78f16f310343d4e26b937. 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/RUB521205633.
We Gotta Make It Count - Vicent Ballester Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca3f19c9bf0d3a2bdd1f5d0e6a0a184225260c715fe60e1d47af499bda5e9ee. 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/RUB521204395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caba6c9459dde1ddb2766a3f2793091412f654a11df4eae34219408e9fefc7c. 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/RUB521207035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2690cf4c2c4d510759e34a2440153bd4c3a0afd2e530e40e1f8ff2f67aa91f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUB521217619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f0eb6cb34844bafd412079be4f0e6cd9fcf71c9fe1225cde0dc36da62f269c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RUB521202493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cff7372be181ea4f073c409393207ca48d53acaf9499440ddf004c6a0c26d7. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:01:02Z), 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/RUB522500388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf473c485ed71eb358416de855ff40ea76e8339c10583d78ed255e789dc0ac41. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/RUB522502081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff1281810d6eaf1a9b6b65630e083e33bc8370abd1a68962ff13132e940647b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:49Z), 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/RUB522504117.