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 0xcc3eed8733b5cbc6effb4ea2af7498b14e94817e68f7a170004f32d421c5e5bf. 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/d7835b3e-1020-4499-a84c-5251136950f4.json and https://artists.proofprofile.net/proofs/artist/d7835b3e-1020-4499-a84c-5251136950f4.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 0x412fbc7cccc7cb34f244a7ee294c509fa3c4c9b09b50365d30eea40bebfbcc01. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:05Z), 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/FRX281711719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f5a4dd04957277cdcd6bfa78a8a59043ba95b82424837aa3d74786ce9df86d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR2X41867310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba85e069c56082899bf27251156688407ca1d1d732ba3f5f78a82ee224c5852. 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/FR2X41867311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeda9324288c33f3600d305ad6cc3ac7fbb54f0c676a8df99e6c4c9fbfbd1a84. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR2X41867306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca64ef11a595da46d4775b22ce5537fd97222aeef7f42ec02fd8db6e17e23e19. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR59R1898099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403bb7d557cd99099e23830f9bacfe7b2ef59c1dfbb3ee80776746caefe93743. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RUA1D2460349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdd5c3b718c2519a5eafce55f8432fcc896f02bfaf264a25565bd156e6f10f1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:54:37Z), 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/RUAGT2478445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d1b6078232f47ac38622b094c82ddddd3b68b874a1c0c243fce40901f9b927. 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/RUAGT2501430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd836460c21cab6d2b57bd92b587793bb993865af4cd75098a542106855ec14. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/RUAGT2501431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6a4662eba4ff9b6bdef5f5c702b43d7194d9e3c4f96988b83509b3ab65e146. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:29:51Z), 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/RUAGT2501432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8076029acdfa9cf8aa94068f66db6153101ddd40df6b573c14112c3965b6b7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUAGT2560633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7042dd508aeaa4e5fa957c7018865ec4fded75fc4d7d9ba3b39110644aee8da4. 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/QZTPX2232414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67091e676d4f66639d137c6746dad9477fce546c993d55775cca272216e12e7. 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/FR59R1889407.