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 0xed064eef3ccdab4ce41a9c6e52a722af25355c3892769bcc52bc771d759c488c. 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/6f5a4c7e-2fe4-4a67-b190-3a813b297fc6.json and https://artists.proofprofile.net/proofs/artist/6f5a4c7e-2fe4-4a67-b190-3a813b297fc6.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 0x3f2a7b642420afd57846e085115aa39f30e05f40d8620feddf4b992fd6f23e7e. 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/QZAPG1847291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4560110af19e75b21b068d0ed31d51a5313c43d20e179f97b42faf38f3c0e2. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:25:28Z), 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/QZDA81887281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54828d0a2f489395a5e7cb656538d192ccce4e31c0adebcd24e60df365e3eed2. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZDA81887283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cde0e4fc98cec87d5df00e6e809a9877253b5bb2fbf79766b83e10ef6941695. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZDA81887285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5800de6038fd1522a70c4180d9bbe6c3bfc7027fa3c9454233698cade61d57cc. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZDA81887288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fc4dd5fca44ccf188be670e1d677f033583a13da44fc06fc50b49dc66e1843. 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/USUYG1233562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be255233622cf8d5402b3c6ee5bc1a9185e56fdf517ddeec73e389edd15d254. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:53:57Z), 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/USUYG1298254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3c002085982f014e122838103e6755c04b1beddc561b5094571f823ae0a056. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USUYG1239151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548d655a38f5863ef62a1e3365f2c820e9e31bc36547b5dc3045fdb196d2eee2. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USUYG1298259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2df53e35b1075309bebb4381cbc8d2e24ff1327d9918e12ffe66e39691cf383. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USUYG1289364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dec148a9d3b92ec97e1f831d7f99880df1d2f2a194cafdea0105acc36f6e936. 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/USUYG1500716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210766ee0e4289d75762e6614d999a979e9b6fcd1dea3414930e3acee4d526c7. 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/USUYG1500719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e146a7b1e17b760a1eef945e9ead84f6b3fdfb4c066f11245cfcabbfebc83f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USUYG1500720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce4b8e7175ae67332dadb39ea38ee336080a5ded1e07ca881bfa873187a1863. 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/USUYG1500722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978ca183b7775df71f7e0fb5cf714d90793acfa09ff925b0d2e534a3f01fd2bd. 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/USUYG1500724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdb0287f3118014be107994e327df803d1bf2a01b377aca7febf0a205297213. 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/USUYG1500715.
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 0x5a7832f5a64ded4fba4b76d0638455c84aa23826104a76074048bd6d45fe1b73. 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/USUYG1500717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8314b62927a02c87e2afbd9731bac76ccc1292c100671446aeec4f25912c4fd. 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/USUYG1500718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03e8dd6d5fc9519ac9d21c033fd2a2a900c37559531ba6d242d3bbe0a3a3ef5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USUYG1500721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe3776dc6db237e92256d882b9cb678604e4c8c1361d5c578bdb42137e96150. 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/USUYG1500723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05398225baef0aaa5ada35ac18edb521d04fb824741b8d8817e0683669b85561. 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/USUYG1500725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf44a71a0b3c1608fe60643f350cc30af03a1a6c30ef0aaf21ddd637743b377. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USUYG1548899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2457631a987c318d48193305722f40beab37db56716bb77b454a9d78253d0b1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USUYG1573793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afed46cd8ffc77b041c7761d68395c28d68f49de2a1db5cb3f4a1f701361728. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USUYG1598878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506bea9c59e537374831e22c24db355255e707986256cbc5e7610dc014da6e5f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZZ7R2575374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39e0e148e886e488ec7fb4495f0262e104addcab29ce535cb9f51da328d72fa. 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/QZTGW2100399.