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 0x084f697d14933a3de11d5db51509f5104aef8e45525864f9f3639d1eb7caf10d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54f85c69-7294-4481-82cb-fe5f4bcfddd9.json and https://artists.proofprofile.net/proofs/artist/54f85c69-7294-4481-82cb-fe5f4bcfddd9.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 0x463c105571c14bf8d3cdc7acdeef5eb439ce817296591196a17c729d3ab9f5ef. 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/TCAHY2442776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a7f33eeadca2fb16fa6d2b244dcf8c79e220475bafd134e08956859e483c33. 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/TCAHY2442786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc784bcc10fdfb24281590c2675c4c72b7ea1bf9583b5ee1918740fcc4a3f98. 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/TCAHY2442795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d30f0ca6f3a644d345f1d7e478d013c57e47ffeea91bb069200718fe14e6b60. 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/TCAHY2442867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ceb28cee7617172ffea3cb99d092aa49ecd9d094102efc357ac81f6175b58f. 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/TCAHZ2436319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6944c9c9209a1355f4d107846e1b2be7544050f56f4e5ded1d7c400aa9fc6b. 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/TCADT1815298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f43111470091d941ad074e4e2b837ba7695366a4f482f64bdccac08f02f045. 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/TCADT1815299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69949c7209f30233881672f70e044bff2d5fb51ad6d2bff3b6c29c4f735a936. 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/TCADT1815302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b2c7d2191722b63e809f078ce04a08df119f075e2d226d6db6922dcff78e5b. 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/TCADT1815304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1e31fa493b9cb35a83689f1e26c933dc4e0ccde3135ef280394a0ec63f7d8f. 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/TCADT1815306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6e321865f0da7050c301d748b2c353af1fa4480160e783c75725882b53de13. 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/TCADT1815307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43079437426b36b219b47591bf1295cdec4dbf9be937c4370397c26f65d40538. 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/TCAGC2295767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd92aa59884d41dae0da9c2689d19eb68cd2c1aa2e36bf2b8972da3855e09df. 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/TCAFB2020072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668f9e64b4aeead1495aa9748678aa9461fcf6d560a87200ead884dc42aab5f8. 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/TCAFB2020076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914a82028f8d893043304a4e236bbe4f68a237efc1e3134eaa352589d716fea3. 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/TCAFB2020079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b81401f095de83533fbfe564f5dfe6dad3347cc72f05895016ef6719cf03fc. 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/TCADM1864271.