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 0xb2df374739c7cd833491236b89ba3a10a85b59c889035734b269c3cffe203bc3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c0366dc-99ba-4d19-8b20-81a81a5caead.json and https://artists.proofprofile.net/proofs/artist/5c0366dc-99ba-4d19-8b20-81a81a5caead.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 0xebd7eee508984764a9f7584b35e550015c5483b2064e5f24acb993e5df1fb4d5. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GBLFP2496620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f9a0d52c213c2edcefb22a463e1877412afa62d88af75596fb2f00009a399f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2496621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9db4ace070cfa7dc69acf5351381e1f7c41452cac8ff2b213cddf8ec51bf86. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKXN22403635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe102aa889b32dbd5c64783724b1e9d1aaf22b33828be80749afa0cc9a327257c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKXN22403634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39c0fbe7132dc683fd471ccce8a7ee9f0e8466495e30ae8a47a3e9779915f0d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/UKXN22441769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a76b14a802a6c0701499d765c9e048d36d371bf385288d81ced8f2dd786717. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKXN22450802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1daec6ea290b6241ab0fd3e6d0cdd535e8f3da19894ba8250c6452603a7ce18. 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/GBKQU2476554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ae165664a193169fdd45a4a82acd2ed056b1869f0d78bf1176842066306786. 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/GBKQU2476555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7d3e31dec2d2eb398ac63633677dcf3f2b7cb91de6a539ca892c859afae143. 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/GBKQU2476556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81add8e3b0bf2776cf37d861b4443e8abd0861865734333fe23d62df0461638a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/AUGBT2452683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444447d014f6fcb711ddd0ef36085c9a93213821aa54b87872540fbaf41b18b2. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/CA5KR2499180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe9807306da9835e23af3cbe0d0fab14ceba60b997d7140af69953ff03b24c7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CA5KR2507432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a38959d268f1b0e155f586c7eb678c1c93ca5153d31a529f2342c0484fe876. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CA5KR2512356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9dd39f30c871d3b100b32609c4dfa4d28b3d840088cb28f15212e6d8a27b7a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/CA5KR2512357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41ca7fa7d0642a50df8ba461f4dfa27df19efe93905fe18a0da273e232ab482. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/CA5KR2512358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b024bc973674a8565a9dc7bcb09c1b00739717af994b0524bbb385c79c70331. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CA5KR2513082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c016721ef825ae548aa2fb16d9ed43e14b56e76ef0b1e7c72fd5eec2f9f5f7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2513085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f871f000e1bc5de358fd9f71e191da5215dc2d867d3c7e9865f4bdc9eda294. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR2517289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676a1be4d9cbeb5946ce1f84243aae862c8c4639c1f712cb37073cf6050cbcb4. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:50:32Z), 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/CA5KR2518621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e61706667a1dd106f248ff1a8bac61bc86bee077fe809ad6f4760bc868f567e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CA5KR2523912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ae9523bda51c7e656a93bb2e48ed8950d2c7b121baeeafe57a28e16a5f4d9f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA5KR2523914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bdc80ac0918ce0bd397c628a5419c9a65fd37904613b7dffdfe9488b6a4beb. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CA5KR2529438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619f6eecc4b9b6c300e6d9dd23df73c981242156abdce47daeb902d50137b440. 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/CA5KR2529439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71ea6112c0e7c36b9676adcfe69f442827bded824bb01271e0a898d1d299828. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/CA5KR2530479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cce01ad7e3c875a90e59fb170f62f637fa42e77218bb1feb253ba03e0c670d. 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/CA5KR2530929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1894a333baa4e1a9d550d1939b68bd9f1afdfe40d76c68648a62a765350b0c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR2530930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b8f7088be2bd94bfcf3c073085a310656dcf7fbdeae397acb0948359365779. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/CA5KR2593611.