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 0xfcfdcc57741cef95c9f4cc5da359c23e5729d37bb91b31d37bf919fc64141e42. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/534b8397-31d8-4026-b9e7-646fce67b42f.json and https://artists.proofprofile.net/proofs/artist/534b8397-31d8-4026-b9e7-646fce67b42f.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 0x2e22d86048b3dab13afd10373ba89b9330ca2895604f5267057a7b5d3cc778b4. 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/GBLV61900905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbef9ffc388da28e22b4b7d1abff8cd314d37e4b582321012e08063f8315bd1. 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/GBLV61900906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18941169c2192f031c9640ff7af272b723d21fc4d4d6c7f80e9ac69a0f8ebbb. 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/GBLV62304683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b2dd492370fb8a02306945472edd66368d412d34ae1fb46cf43eb4814996c7. 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/GBKQU2385206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7e7735c5b3f057b4ce22fc02f68853a24d195714b081aafdd60ef7eb208c81. 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/CA5KR2345544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08d2a47c7bdfc7e9173ee8b05c19de5fb9c150e7bc385c90ef1c33a449a9fd2. 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/GBKQU2286303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb172f8658db20d81f36572f267a716f52f040b5661b7e29b7f3f59e5f2d15d. 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/GBKQU2259723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950d2ef30397353398267ade903ecf61a5d50bea4715d67a542d35e2c45360f8. 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/QZFPL2100183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456f24952d0fea8a9838e3997fcf1fa559de6841ecec656ff7bfefb969a52d5c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZFPL2100181.
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 0xedc05437525c6b983dd2e4aae1adc2c695d6270cd317451f3f0858c398d0fe57. 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/GBLV62123876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344f62157a982acd8fc86d891b03b9d9b3359e8e74d5cf6fb3b0ad79a3284a1a. 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/GBLV62123877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa630c9e9c30a2666a35f1f88ca210926f46391b91b0dd19e98ce6c038c932e4c. 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/GBKQU2183533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62163bdc7d2cef3e5e1424494c33bf424ed20d053211892f47becc27b2764ea6. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/GBKQU2183531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ddf6732d48b73439ac0529e083bfa3a6e1508964d2fbbdf9ae6b8a24c21978. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU2183532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af72a2a6a7fb5ab4e2ed6fd19f599659ff7f67fd11c89dc13ed4e894afecab2. 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/NLZ542100681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fcf487730d191821bb5afde93b47fc6ed981e0019aab5b0897c2cccc43fd79. 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/GBKQU2107613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7134354de109440a6ce958c7c739c6c1d18627cfdcdfd0de803efc60aedd32f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU2107614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd03bbd6f327bcb042ef0b721e77db30290c64e838e45cac451255daac779a91. 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/GBKQU2048450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f31e6a96413a3392adf72f586f7505a3db525a01151f7700d971079265a3013. 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/GBKQU1992788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3184a285bac0d0707e9608bc1e07263ffc5aa69961f49dc8202420cb6e95417. 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/GBKQU1925142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaa3bdbac5fa039b92dc7302378402c352e0acea9cda6595c1bf2e585e8dca7. 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/GBKQU1915176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab26000b6831f992644ddea94afbe8bad9336efc81cf15f69b63c79b0631a515. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBKQU1915177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565bf18503ec42b51760036ccf5c69eafccee33e99bee7f092ac67393c77d999. 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/CA5KR1810384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74c2cfd47a4d0d075e805afab61271d93ba38c7058a65a8785fa4d02e73f230. 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/CA5KR1558423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c64627e877b97f4cc7e2b3a6356b68a1bef7bbf98c724884d9bbc00db5005c7. 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/GBKQU1609310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e55768e6c23560862af4468429f2dd1848e4d2a783e653c0490bfc763bce4a. 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/GBKQU1609311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1098b027fb2587175c11e58118a50ac0fb6a724c3049010e0cf8f9942d026709. 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/NL3M12500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec51f37ce49714b5800e9b26b50c9ab71e4f35db0ab0dd05a61823523216d0af. 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/NL3M12500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe955c5eac2a2efe20d3b8a98f05d807004ba1fa36527d7c2fa53d1f41e584b42. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2451938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece6cc56e1628e5263b2cf1286e2d1fd0d97f8be6468463cc6f26443d4df217c. 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/GBKQU2451939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f8222e343770305369f6f854cab4a977e51259f1b92566ca725fcf22b8ef59. 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/GBKQU2417148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6451057035b5727a9ab6cef176f4e9c59e7a43b174d0b44f18f257e9d8bef9c0. 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/QZK6L2169776.