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 0xec2cf938ecc27f6c6a9c9d408ae8178b60dc935412b865d9618ee0ab1dde9842. 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/8852ce8f-9bfa-4572-a745-e49de89ba27a.json and https://artists.proofprofile.net/proofs/artist/8852ce8f-9bfa-4572-a745-e49de89ba27a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Castle (feat. FAST BOY) - Maurice Lessing Remix
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 0x3d531d58e8683a17bcec7913ff849112ae98e178eec220d780686fc6303734ca. 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/DEA622200504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85955567bfe7783cafbc5acbf89c4146f515d728f18aade3cc2028e84b1276df. 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/DEA622200505.
To the Moon and Back (Remix Contest Winners)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d9b4782572539606824a9463a8e3dd641e4abdcea8e0dcc3d482bb99f9daca. 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/DEL712010249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1375ce408d572f44092a243bdde0eb1e072a9e217a8efa141730483123ae8e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6MZ2459815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec930dad946c98bf7e4779770ae567e16d3ac281509016b939c1d99abb0c6c78. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEA622400294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bee7f645904365dd839aca37a413946e701307f83639b25ef465673390d81c. 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/NL1ZN2302605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80c89dd8623b4618884efc0e4a1911be41f17de4bea0af8291c7276fc19cd8f. 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/GBK6Y2251701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7278339c50e8283dd78b6cd47ac65a2a480f0c1eb77457ddf22bf562912db2a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEA622300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8694f86b3fde43ade60ea5392f7f86376fd04545f731d9dded930654afd4044a. 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/NL1ZN2301966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892519f32296c349d6ced73fc0d6a2dfc5c33b7fbabca33f51d17da2b4cd169d. 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/NL1ZN2201769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ffa5abecf5716510aaf02e0db5d5e1d1029351cc5f67973c5ca065dfc896c1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NL1ZN2201616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ba670549ffbbcab68463294e854b8ac8cf21e33cc9e7f5dea4733e65302ec6. 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/NL1ZN2201604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c812029008e7bea6abb3e14314163f82f676c20173621182d44263f3014fe6e. 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/NL1ZN2001233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7f1cb4dfa3c20ab982cdbe9151f3851320da8bc301da8b9a8831753969cc30. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1ZN2001187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3d571d8bd52ceb3bc99579638c258559b8e6e14db5ad5450da0cae601d11cf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NL1ZN2000888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d619ac497cfd3c662b3d7328b493e0a51664b29f1658148157410d528762716. 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/NL1ZN2000843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674f87260340d7cc0c6a1f47eb50203709c62f5514e7c865746781a0fb4ddc32. 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/NL1ZN2000806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f815f0e248a5e3ab63ad13f719c1c9c60c207b0aa72c0046a590e150592e9f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH3132000252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68be82bbe64714e26d37565faa482b361d69fd0e959b87baadfa62a43fb8149e. 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/CA5KR1983385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d67d05c80811d94625918405528a589512669774510271d70135934d1e3943. 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/NLQ8D1900381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea0dc6710e2a0ef31beea2f0810fad345a5ca7b30f755771df3ef42bbd0665e. 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/GBMA21960098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6ac3ac2b114438b700f8a1aaa7cc8048c6c310e4745ea80e81a0ced3a37463. 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/CH6541605024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7278339c50e8283dd78b6cd47ac65a2a480f0c1eb77457ddf22bf562912db2a. 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/DEA622300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91abc7b1945fbd007d86bd33868bb788dbd1f7a768974d2d6bc21d46325f0408. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM72503830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755634c93a18be9367a6d5302431fbf9910e54232abff2351677c1f300342d05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DES232500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc139a1ca28e744743e97b8f6afd4017220914278deeacd0c68dbc2bc9ab760db. 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/DES232500071.