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 0x80d08b86f08b20bae682ffde7930976015b05c23d37a53cfe111d7f577bf52de. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fde18fe-c47f-4370-b523-ce259c38eddd.json and https://artists.proofprofile.net/proofs/artist/9fde18fe-c47f-4370-b523-ce259c38eddd.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 0x040ae65f807a8e82f1fd4cacbb40b5de2792d1d167fb2c83428bc45731fee08e. 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/QM2PV1756700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2485e092d1e7aea9e8278ad1b185a5b1b5f535502d3322d8fc3fbd62590faca. 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/QM2PV1756705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04af5c2ef48a79ca8d69327dc1497f99367e4586610c619378b8a89f5fe4576. 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/QM2PV1756708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2924cff6ec82c1c51df576e4930b2591effd8f62c00cc6cd7bd28fdff2d39a33. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/NO26K1807030.
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 0x1ae5dcfc9a8cbfd84db20e99d1dad741db234929c88f0904914d65a5568ad960. 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/QM2PV1756698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ae4e5e09fd64bf2a001ad592f5fcdd210c2d017f9e0c9640f5693837212ae. 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/QM2PV1756699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1a5a668259a94e37035eb41ddc4b250f0f63eedba74461fa68c3f801e3cf26. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM2PV1756701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46a8a3aa4eb3d24c4c13ca822f112bb241139edba0ac7dc30c3916422e45d42. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QM2PV1736949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34560b233cb0cb35c2913d3836180caec385f92d16eb3f62a1fa6c736034ecb1. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QM2PV1756703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0400272f6f7fb1e1bc6a26ba3d34f2eff952dd1cf7a78d4abdf3bbd40b8b70. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QM2PV1756704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2992419d1bd2276b483713bf65cb901c9cb3ac4b03d3e091c2123497c79aa2c5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM2PV1756706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371f5f919ac76be9e9bc2d3a150550d3fde7ccd0facccde4522fda974aeccccf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM2PV1756710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80ad6a5980388bbc3ee6a7cbf3a05610d0813b151d4d9c62cf0c469038e0e1b. 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/SEWDL6117721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c53d24943bb7e8e35f171e2d005e9a6863b54e3ae1e9b48fe4288a2cc7bd16. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:40:05Z), 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/SEWDL6117722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7d27a497e44fb678fab2f3f2cbf887bd8f36890304c24f64037e579537596b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:28:49Z), 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/SEWDL6117723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb860c1200d3800ae72a5dc29e01ff0396c845657ef581c0eb1f9fc3a751176f. 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/SEWDL6117725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e8aee090675851b6a3ec189ed0b41485a1b5763ee2c095503cafdcacb0dc51. 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/SEWDL6117728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe957ab5c4019c5e9ec5d7a240e1038d96f2b005a25c959d793ed20b3231ec154. 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/SEWDL6117729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3715e5e49719e52ea1af6597b4fcfea478a41f5c94a647f7734023be578d095. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEWDL6117726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500f093a8d0a5167c5597d69b5680127678c447924b6c4840b67f04b230cf626. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/SEWDL6117730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63aea71dda5f7f352a415b6ea9e3eab5c7e46d456431ad6c6b998d3a4283fcee. 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/SEYOK1318426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab13b5b07c2276d04c1043a0992c264c7b2ba85560cc5e1ce1760ee309a5f57. 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/SEYOK1318428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2944d2f7b63c0e79c89a5571f5b3658d019e89ec393650e61de2e48da90e885. 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/SEYOK1318430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4a658ca62c260ee7863728c699b88fd77f87244bba4c94b905e1a449b91a42. 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/QZHN61962326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8ed25881f7538aceab8d1d9e7cefdb88687c25b7e5cf08b86a0faacc99a965. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZHN61962327.