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 0x6347da632f61cf2531308193b3903adde13ccf7307f51a886cce0a8707ab144c. 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/a5a60d06-b756-4e2b-896f-9a5edd40d74a.json and https://artists.proofprofile.net/proofs/artist/a5a60d06-b756-4e2b-896f-9a5edd40d74a.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 0xd0dd7734d8ced468fcff2c6c6dbc833543ab072245f7a2e3a4c7aecc3e8752f1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAEZ2001481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fdec21b33af629d7e6e2dec606d266c9720545f0c55a602a5b7211c92936a7. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAFK2159372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc746c3ad3c4f9735bf384de212c948a8ab020b7d571b03f215833f8c73915cd3. 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/QZQAY2155697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28146ce37e7a7b4203c5f5420e228d11d5661f0aabe4ca92eb6ef604c7700e8. 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/TCAFW2134655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d92d1be5af8c623fab875f384cf026a2028e4e39580f1728ccd88d9881e6434. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:29:28Z), 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/TCAGK2274941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d36dc5b895008047b603f45a0f4375598881881e4a2a59bef71895df503f303. 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/TCAGR2298838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8304a62152734db472796f34e2229eff432bb219072e3a094788f7668e137fa8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAHQ2342692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1b51cb4eb458b5a5cd95c6f64fc8a2c60f805ea103858187beb16aeb4fa78c. 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/TCAHS2355746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d653d7991c017467de044295f3d7698689847cdb4eb26bcb2ec7a2a18f28b0. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAHY2402022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a258bad81f2ded4df99f357e22f2b01281df61317dfb1a77de47a1cce4e5e2. 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/TCAIN2440089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e2f5f899bf1cf26cc0e34c58d686f66b5ee99b43c70549b94d2495fe5e606d. 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/TCAIO2411306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2f0c52a0eac73da9362b1423c2bcb121958ef45010f573616cfdce1f28f6a6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:30:14Z), 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/TCAIT2411190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d479ecc70677eea44595759b5449b17316596a74abc3f1d32d34ade9251153. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAIV2461575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3667fe3a88b244992e4dc6050833d3f3250d875563e569a9977e7f5e1e9bb703. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJA2430995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3631f91762d6db38a487da14bcd2933e628bee44710b543e58888d8a2cbcd1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:30:13Z), 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/QT6622534051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd000d400ad05e15ee17660aecf276bd90201f23c86167a0c1648dc38eca043d6. 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/QZNWQ2334166.