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 0x980df5d77cb52770125fe6ee487af66372210a7a92b896afb303b58a8e6750fc. 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/afb51176-2bb3-4f30-ab3a-aa3731020a86.json and https://artists.proofprofile.net/proofs/artist/afb51176-2bb3-4f30-ab3a-aa3731020a86.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 0x3a151ee0fd779c49dc930292ae501a0be46d2c0f9aee98faae3180b6c19d35fd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBLLT2105875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20d99de7f2e939a4658887d2c18c0d307dedc281a7768ced41e9c617c75bb4b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:04Z), 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/GBLLT2327886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923807bf267110f2c3915555d22e365d2d2769d9c4bf31a6faff3e3075ca7992. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBLLT2245633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5378c3a44e48aaac6e3c786f2757ac1149632d4e0cd6efd4a836cf3e66a6f842. 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/NLK8E2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f91a0226480cbf54a530238b7277e8055b32f9f58707de1cc92e4e0a5d44555. 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/GBLLT2204120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648e5fd6f4fd7406280e253b0a59d7ed8f324008fae7242c2e54fd3aa8c73f26. 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/QZFZ42109715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb650158a01e1e74099b669014ee6bc148e51bd4145e7be0fda8000c86c05c77a. 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/TCAES2014273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bbc081b033ab657ddbf61b2a995a52d35e4226a9039199a390a22ab8a48ca6. 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/NL4DU2000500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bce477e9239b03e72626cf6414156ee93452529375e56f3c7db307f0da547e6. 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/NL4DU2000476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79fbfa5138e0f51d65ee7dfab08524bbe456e06d52e1770c2f813de037bb4f1. 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/NL4DU2000489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c30cde0e59d1bb3a022706e4ed16e8463c3ff080eb942edf5a4eb7d967da44. 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/NL4DU2000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9f65595cb73d0dbf214e0e7f7f9b6e8ceb8b378979d4e42f4e9ab312ca03b4. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/NL4DU2000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b11b46df1d1163af565a60e2c78a075728d075b7b15c8f34024999b04de25f9. 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/NL4DU2000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea0ec801118f603c2da43eed6679ade0f742e1cca85685b5329573adab04820. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:35Z), 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/NL4DU2000497.
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 0xa252385765a278f6e8a218b5fb03a69b3ad8c945673ddd08f1e8be988c362a8d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NL4DU2000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc542a5a61b227122a8a1a70f9dc1807092b0034285fd3b864392668201cf5194. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NL4DU2000397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c6459a9e6666c1a6cde183cbd35b4df740e201e93bbb63fae0e3240ac433ee. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/NL4DU2000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286dbf2065cef2b6904aecb0181f9bdbd1f0d00d4dcf9dde4acd05d1e17350d9. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/NL4DU2000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1cec76008dc4004bf2d1eb3dcc2848796af9dfd56bd563c10828ae465b271c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NL4DU2000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0429f72faae089c61e89a11e952fd1875d67d4f79becc8c700a8a2f74ac38. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NL4DU2000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67354804e62cfff27dbb93e844834f75d6392209988e684ddcfba1810c62f15b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NL4DU2000142.