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 0x7051d1d169e9c7ed1643779b9915389ab55929d4eb4d27bf015db37235b7cd29. 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/8d312859-2cf1-4b98-bb0c-4673d7c0a17a.json and https://artists.proofprofile.net/proofs/artist/8d312859-2cf1-4b98-bb0c-4673d7c0a17a.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 0xeb08f10e0b9e3f7f3991843380bf32b74e8f1f3cf19a5e34937af3013f14fe57. 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/BXZDZ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95d55c730aca275989e9a8a120e12a83a3459185a295b5370f65f69c981ffd5. 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/BCJAV2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8622730b0658bd3cf1a0e1755eb817417ad4ba8e731f030b84b721ae27a226cf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BCJAV2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3248e012d23e758691fb48428b412bf4391c9d2b96ebde5f953b6e2cb7cb654e. 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/QZMZ92109848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c76a7ceece89d7653bc5c4f49b508567aa953dbd47016a6ff01b6ee6f5332e. 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/BXZ5L2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecd37e3e15114b5841650a44f93c221b4742fc74022be3743cc0351a38ae7b1. 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/BKZDE2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf255e7a516c117a3ad5e3689e751155cad1b73eefac71817dce0b2cff1cab7f. 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/BXZDZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a81a3aeb38ddc3ed3947f426d3d29c20625a537759fc587755d5d79d7cd009. 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/BXZDZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf8ab3ab62cd99b017abba371bde59899090aa9c6401981fe00ba0b646a3c66. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZNJX2458093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a6ceb878e98dcc9189106c6accc9c49a87a44c1484ff762fbbd6c9d15db41a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BRUM72400897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89c80caf3364c25ba9f1e1f77a2ccb486f7356be8c91c9799ac808aa8d932d9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BX5UA2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c4ab36ea736c1f7c91cc0d26e419d0646e5123764b1687d1f2636546a1fe5c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BR9O72500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa429157463a4eec4e7e82497f29235e21c84df200ebec9b54261ab3f0fb15c. 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/BRUM72400900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f13069dd18e8c4312ff00d3da45bb721373f86979e6fc5012e0a7fca567360. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK44J2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58f0b6d9e9b564efa22e9ee854d835ae1d60cb6f4563e7eb81319f728fe6d6e. 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/BCYAU2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5159b910ff13a20a702e745fcbbfb2a455aa0bcc360a2d6ba91205eea248d896. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BK44J2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda70c5d2a3f70d2562972723535341a17d2135a284b519af551c07f47a78b24. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BK44J2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a28618834be49c0d48bae9b025776f46066a7ef4f72055e256366a2867518c. 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/BCO3C2100030.
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 0xe3d198f64649b816de872da45b07bf870743abf6d301eff3970313bcbdbb228e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BK44J2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb315acdc840e6d2ccccb0f96e7467cf179f133495ff6aa94776acf11a5ac1a64. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BK44J2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398b794a787a51a8526f2565db28e2b1698fb1088bbc4a0581e2c942d2abcbcd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BK44J2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4399f85c5e418dc94117edc571ba5f37a550fb864dc41fc04acf79547666c60f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BK44J2300002.