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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2a43d98caea03046704a68974bf714766b47c8e0c635ae84c7ffdfd65e7a1d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3044c982-7664-4031-a493-7dc216f7a785.json and https://artists.proofprofile.net/proofs/artist/3044c982-7664-4031-a493-7dc216f7a785.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725d22a5583ce2e47a6ab92eec959b8d2bd99052b6fd7bcfb65b7c45b7882ed7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72100283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34435b58d9751195e3f22aa11e30d916d48eade2bf6c06efa5683565ffe470e9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72100284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f23f243d2225ff2e28e54552b41c285ad927ed786af68e03c7a992b66cdcb2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM72100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14054b0da7d8d0f74bbcd2f355226a43dd0cdcfc9b21e12d61880460a24734dd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM72100285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d864803839fdc41ca260e608028609d83ce4fb00b5f4f5c8792b0e1d2b1a53. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72100286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd968b489dc3ec894b2d2f5e2c7c6d8f63a9c8a2db6bdd6cfc21dcb38dc035b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM72100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b17a10dd2ea3e1f0821dd4ff5228cc366e75a422dbab6a1ed9e87b1b0aa955. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKUM72100287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c76afeb9c18af610dfb355bed88ef4a9a71c28829bbe242219037fbf09f150. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72100288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4842c6cd2555a0d11bdcb953bf7b2e0ecd3f0a390db6431f155aa7882c90db9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM72100289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2cb8cd1b77c784a518a240653fcf3391bff2f0b9734d2fd97967c36a25b531. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM72100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4feba42e7c8bb373a67a4fe44e16967ccfb5a1978ebaa748a2eb8975000e8de. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKUM72100233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20cd5c3431b7edf0cd21a79ed6ddacdefd415e65ee3df3b09374cb083b07a80. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM72100291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9993c0017f2f0e59ed9f9a93961eedb26a0195903243724f0ea3eb81d6211e08. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKUM72100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a2c5be74478af80230c445280bd96c4c5f3a4edd421b6c87f8669b4bfa84e9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1215e21d9ee4441b8f67799f6408572ba85d997be35dc2a112b2d51222e8c3ed. 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/DKADG2300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672b260798bb26aab19053a2bccbcc294d015f5429f247ff2bfd82d899b86e1a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKADG2300587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b895ad88db01c6a399d24a42b58ec28a05955e153e6cdb7b3205ed6e1fb572b. 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/DKADG2400515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c90728e69c466522b42602a432b88d461c3b8c29d392d4d78a8a8da6af4e4e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKADG1900639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3bb909495ea501691bb6beb4faca42243ac2b9b6cb6f242dc84834a1fd3b98. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKADG1900173.