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 0x5d020d3f11557d2291ca85f9f3c229d3a8d9378f8e4855f93f38d3c69315d79e. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e1bb2c4-bc58-4a07-bfee-cccef3cb38f3.json and https://artists.proofprofile.net/proofs/artist/4e1bb2c4-bc58-4a07-bfee-cccef3cb38f3.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 0xeea498804c56ddcbcd1aeb28b784b31568522cdab7213ba6a513ab94e9ec4e1b. 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/BK8SG2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7e51d09e31ecad72556ae08d4afa75ff3770303d3b18371361e96213f8d8cd. 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/BK8SG2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fda67f0ff1145f6c663d7f7733c8519ca9bde60abfccfeadd45b03452ee5a8a. 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/BK8SG2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0168c71201c6521d477749521c65445cb8d3d0a5875d32ca1ab4778feb28c40f. 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/BK8SG2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6c1b3c7614087dacc14afaeffa37dc3f249e19f7b4a1768a2ff2920961d5b8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BK8SG2500022.
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 0x1b1c0d2339749d71dfbf11d546121945a438c9da8e75c3382f6dedfd303843d2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BK8SG2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5806af80b4e57953a7102cc4caec959e523588077decf754875de715847aae06. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BK8SG2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974a6e03199116376a033c3c73207cd8c8bd322eb372864b203fb3e56285bbdc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BK8SG2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7541bb0fb08bb0d7341e36b8933aa8f36793698a7038b379aa8b60a0f88562e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:37:04Z), 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/BK8SG2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cbcb8c7adff02da20bc978e657c7dc77c09c888c6c2dd117e041286995c680. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BK8SG2500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4740cc1a4565594c2fb1fd178eac4d4a045300f9cc53f7fa3a49997bfc64d958. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/BK8SG2500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a4c3bbd1c4f92518e35b1dea5a0dffb727bca0a064675957dbf025b80910c2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BK8SG2500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2234cf24187cd24d8d8e7c8a2cd2d9269c16326cde9fddd394f5cc92fcd28484. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:03:23Z), 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/BK8SG2500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd24326d9b28860de5f339d9a86612c9c11452146bab09da974d1a9e9fdb4541. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:18Z), 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/BK8SG2500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fa790d55112774ff1a79adcb32871a932dbee0371538bcb7e3d25cb3c9cd11. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/BK8SG2500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26f1dd864d0a3a6744df09a4e53daf7c56eeaa0391b2f5cc7b11879f9ec2cb5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BK8SG2500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ca0e42a19530e4ab6dfd52e059d5b92663e9919991cc94fa3f0ce9689c0eaf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BK8SG2500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf352325cee97f304c41b33d1792eb4653a1db38a3b90fe0050ddb22976cfa18. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BK8SG2500120.