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 0xf4d53000c140198b51dc532f20bf6a155fed0c06ba8523b279601c5e630ca29c. 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/982e8450-e61c-4202-9d76-5384924e562b.json and https://artists.proofprofile.net/proofs/artist/982e8450-e61c-4202-9d76-5384924e562b.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 0x1a8ae548fecc56f6a7a718b1d6304b9b36e044d06dde6b40331e6996cb2a2743. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTPX2257606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86c39ec92db2145cf5d474223ad11d034ada0e759d94aa631056ca916d0a464. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZW9L2211476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067d0ea854242effa8432bece4a6e7b9a3f668042e6cfc3f464e32106504cf45. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJV2393930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd388d4d4443fe195fda7347973ea1d40bc8e8b247221b9190091d390088d9a8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJV2393927.
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 0xa0dca54aafbe6e4a5b35d65b81d2feee57d170b9a80e4e31083f78d2d04cdc34. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNJV2393928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179894a19d292a12502595959b0561f455551c80c66c25b857fffa6a09668a6b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNJV2393929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01da12e6e003d10dd38fd7d21934c63fde886418907fedba3152dac4c2a9fa70. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTV32344983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5fdc73e314003d247c453fa965395abec4f7e2753e6e3c2458233e2f90e749. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZEB2320760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb829326fa5bae92303b2831e19dab86c64b94606b1aff8da67a76190621f90b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWV32468510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696eefae76b566ff45d6fe874ef121c4664fabf6cf2bcba5c4b4fae775660337. 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/QZWV32468537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10ad5f6437d2568520b4a68274312419274b09a720fa83647e7ee378dc038f9. 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/QZWV32468548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04f32eabcb1d7b1b23aadd6d2b24f4369df11abe96469f207449ba4777c9788. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWV32470968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0223493c9946c768170de5a4830c89bf48cda0061132b910b73b6c82cc04d01. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZZ8A2430834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2167012d886658644dd771923a5676f601dfe8ab721a45e8813edd900c91ed2f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ8B2467407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe48bef5db950a977d3760768797666657a172c960e594e036da7742200efe8e. 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/USLZJ2508070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4200bb5f6833d59a934de3e1f90bdc5a4905c32fc4076ddbd735112f916b9696. 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/USLZJ2508167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38334d9c1dbb26b7d23948bcbba832921d413bd211ee2d3d7e980d59c11416a2. 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/USLZJ2508188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55ee439e258b8a35c85fe817a11e5ca5f7641cd4849f42691e3743ee8f5729a. 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/USLZJ2508191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343d307dd4bdf9bea1a2c0d0d37a929a7634e460398ccc73f4919323946cf96f. 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/USLZJ2508204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f414deca27c624c28b93dad5b71528e8ca08aeca443113938a65b7172ae0bf. 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/USLZJ2508214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4b531e45bf0d99bb3f6da665b1ca4f38076bd2775b96828ae4b7793e4cbbf0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZWV32590416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797f5c2c26578a170ae085b1e41b2ce2f21bfed7637864fea2d0148d18d0fc4a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWV32590421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca2ec978349d56a5415158e022d8210be87dacc2e805968754aeafe945742ab. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWV32590436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc38c5fe537b08c1cfb2c44c0f34e1b92fc2cdf9b8fc2aa149520b5e5befeb6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWV32590444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea76a482a96ac0558f1501183025d6650f6774eeee7a23d271ace6be798f2555. 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/QZWV32590453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da8c0c43f2c2b03ba753b8fca1553b35ffe7f8318f935c61be9c7b7d6097857. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZWV32590459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06c51120ffcbc36deb4a36b74c4ff6d280d719aa6507898c1779e119e86a5ef. 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/QZTRX2275404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c1c69dd8f3ced95b32445cec7f20c2c61456a7ad327cf9f4f2b1b9040a469f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ5FN2409021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe952e72fac624b9625a5c6862a1de12dad9cf4c7b59406740c6bc242c450e2d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ5FN2349358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2ff72190098b2508e205a82b09ddc99ac584dc6a0338f9bce2065029bae30d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTV32384454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0a3970ceb5d7f55d4883be4998e52d3942a6641107b84baf093c177bbac797. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTRX2275407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78ff317e947572052ee858c4803f68fa5d80dc3e274e01b72b0f4ab515988ae. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNJZ2244952.