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 0x56a4a46d0d7312efdbf8ebcdd57c97017303b00225c450a01d28141edeb72154. 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/23c2c4d2-fe93-47a0-be36-dc40bbc14141.json and https://artists.proofprofile.net/proofs/artist/23c2c4d2-fe93-47a0-be36-dc40bbc14141.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 0xa7c4de06017686c2bee62386f16a75ce7cd59646b0d26fbe69561c430f8829be. 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/FR9W12127666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d323fd8ffab5423357514fce9e9d7bc670da6df1f18dad285f70f60dc0a4d17. 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/FR9W12127668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb917a429c4622c560c8c11d3ee49ba587757bb8bf686a2c23999cceefef86fb1. 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/FRX201505395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ac468933d176dcf4ccc37c69abffeaef1b646444f91a3e23d72419c4eeffd0. 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/FRX201505396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09065836d7b7a2a8e3b188a99826e1d25107004522eb259a671e3e77e750a63. 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/FRX201505397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba04e3bcbe553e7883858642a4bddb3b4abc9b6906e61e254b03d0042f7a84db. 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/FRX201505399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbef66c2a14b03f534cc7c3198a29ae305b7f8f12ceb288253d9027c0591d62. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX201505401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa189db7bb812e706f918db67f538d27fa7df81e00c4975592c4247ff1888be40. 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/FRX201505402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d980875786181cea429b21c601e8b749d69f53192a57b3228725c6f9f34b158. 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/FRX201505404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994e1fc3dcae1f7582587266fc4f7420ffcc8ab657a00e4052e915baba023ec6. 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/DEHC81100177.
V​/​A IC YEAR, Vol. 03: A Selection From 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43717b9f5b48ca99cd841b9856c7691aad2d0c898b6ad7002f9f97bd25a34e. 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/FR2X41601652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f057bed1897a57ad793d219b67358d0fcbd8aa1b8650324e15bdde9816635a. 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/QZMEV2163817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a91a3261d48c55f65723f1fcfd1016d795c22420c50502863f0bc2f36054e5d. 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/BEC262540503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0888aa274177c34e6ec3b9b88a94a3cdfca360e43928314bc137e2816f819c40. 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/DES560809605.