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 0xce5915fdda5fc7fe8017ae915f7ad12a4a164576e2283c67f7a7b71a32debd58. 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/d66fa224-c8f6-4a84-9b9c-a88019bfcea8.json and https://artists.proofprofile.net/proofs/artist/d66fa224-c8f6-4a84-9b9c-a88019bfcea8.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 0x4e7d6787a82e12e123fe891952311b28cb55f8f13ed444f5cf9fa854a31c4b7b. 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/USZZ81310279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7e601bbc9ef3dbcd15649086ece28d7de3704e84c4c2004a3650e56a13ee9b. 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/USZZ81310281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cad70acd17e52ecad77e3972396a4fe00adef03bcc817292e5990481e83fc3. 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/USZZ81310282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a686a70ef63b2860cd342289f22f8ae258e7296a7fdd1b9c154f847d041eb6. 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/USZZ81310283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb0bdfa0857fec496b3a9c70982fc0892d1b9bb604877eb426973617daac9b4. 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/USZZ81310285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782de072dd7796f746cd4fda817a0ee8757830c8321b3f18b767ec2f1aab67a. 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/USZZ81310286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f28619bbe66f4bdb3b9430953bfc789dc82beba095d0d394f60cbfe0ffc69fe. 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/USZZ81310288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ca7d660d056a514f968e5582093e63c8184abb8556f62aa7745e89196cc392. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USZZ81310278.
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 0xfde12baa6a67e2a879ca51db0ae82fd044f47807524beb5547268867002b2f91. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USZZ81310280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4e9fa4632adc84bb5e01284540b650d981776dab2be0f3a8417e4ddf2ec9fc. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USZZ81310284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa416712e17e814dfc33b1973b8f91de0cf0ab4dddc3be08a9afd15118f28aa74. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USZZ81310287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b8e3600e3780d752fa9f661e781cbe83c80e10c59483a5b61990e32202fbc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USZZ81210124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6612322e16457d368e68f8ee6279149e38559f16f23d056a540919238b8d0a3. 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/USZZ81210125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fb3f0451917f4d4b8e75dae807c182c075f26eb8856cb84a0f549f28cf0dba. 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/USZZ81210126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dddb3934411f7f25f94580fc34677b50bcf83080f953be62e01dad6206e69d. 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/USZZ81210128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e98f76b0da29436a2ad30d6004108b80cd89721be4949075f498291beffa01b. 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/USZZ81210129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd94e77a4684f4ce885740d30bf0c9dd531b5624071acfd12caeae3f07b924d4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USZZ81210130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782cba579784d53f1bce01b251694ea6e4b47d10689ea4732eeb68fca933e2ad. 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/USZZ81210132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360ecbea3deb1ede03eac13d2368affe71589721135d8536b09ccf428627483f. 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/USZZ81210133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ab314e861ef9005e326e20a428d70327ce7e7c531c74f0553b3af058250c9c. 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/USZZ81210134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde40b9257474c4c5234e2ce67691d13650f1cafa7be9246465f442738461a9eb. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:48Z), 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/USZZ81210127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb452ad319856514191ec02e17894286909cd0542916c21fff545385ec440fea. 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/USZZ81210131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8776b5f5eba69ce24b9f78120f6fa5e97f6b605bc1885dd47f363eb2d56b8921. 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/TCAAS1078464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d1a60d1571f110d63be665bb9ffd77d24d844c826adf5a53d8e3814f9aa72f. 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/TCAAS1078465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2121cf6f30839c2b91c11c7d5d40efc892943bb53ba259dfbd08becdee3a9234. 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/TCAAS1078467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d85c55297e6f9c9e07127815a3d870af2861d68b0e32c80ef10bf74eddc387. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAAS1078470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50694050642cf7f7e92d5ee7f568f292d27d6e0e2e35f649d745d656daa21191. 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/TCAAS1078472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a26e8e8510068309c26c155941384d6290ad6bc9c55be2b1b320c87730d0a98. 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/TCAAS1078476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0211ee46f36286c110f6e9912fe0cdd591d960539bd4e688ee7a79ba3065f3c. 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/TCAAS1078478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b67e79cf00a148a5455828bb55ce9c0daf98d87212dfec236bee90d0671dfc. 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/TCAAW1183244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d42d7733e32c7840ff4028c7ec3d4990bf8e08f9bed1d0531bcc060538eb1ca. 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/TCAAW1183247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f7cf89bdecf8976d4df1fc1bbc686b17fde776d7d26b2c8e2282e6e488d99e. 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/TCAAW1183248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7e07c8b07c4a0a8dd2f9d5fff7e7f1a1d68a86245d4c661bb53131e7e67a9c. 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/TCAAW1183249.