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 0xc18114a8c8d79f1dcb2c98179825e62216c306fe0cff06c390206f9079b306be. 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/eca1a7bf-12db-4266-bdde-2a4875397752.json and https://artists.proofprofile.net/proofs/artist/eca1a7bf-12db-4266-bdde-2a4875397752.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 0x347462711f58858f5cd5c12f3348c07e37fa91ce0ad2ec20341ceb1a1e4dcd7d. 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/ITH471803201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c899c6031608cc34c47af6d3226b8d83cf2f990740bf3ca2f8aa2087708a60. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ITH471803203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f25d5fed1cac088b88cd5c7eeed428b4024215d9e3bd048958309d81f4c2bcf. 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/ITH471811501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac45f296f8d4a08720d2ba81a45c2ba476029d783b683e607efe6fc5afbebde6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:27:40Z), 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/ITH472005301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45779cb2769790618179fc01d61eb53f5aa0f827325b0fcb8c0dc12b49c98a2. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:50:12Z), 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/ITH472002303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed1609af8819b2908d37d9f22afc54b5ab022a2ef2c4fc923044a742a86fba0. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:27Z), 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/ITH472002304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8cd3b36b88f95485f9b2ed4f3b0f989ffe629f5578f873333e89af2604e2e7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITH472002305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273f708c16e88690ab2fac0a36334f5aa8f8d8895ef634375c6d4ecc925bd466. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:29:51Z), 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/ITH472002306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3b44b0af3f8b2463c827134ad191a47b212d17a05b0e5009e5f8e47b2103a4. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:09:27Z), 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/ITH472002307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a110cc00d045eb1330ef85c6c1d21a4cb9635f87ab5958cba91b49866ad539. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ITH472002309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee0660133b1003b248e2e2e67ca1d49bae98a299913a0f2198537fdd06fa54d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:43Z), 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/TCAFL2140052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edfb92561cf51529667498a268872baeaf1a682767a56c23bcf25e21bc1f2a7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ITR632100253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98e978e158c135fa7b7ddccaf3fbf1b395ed6ffb7c6b3493e5abba15e82c4dc. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ITR632201142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2d28992a3399082fbe6fcffbc43b8045a33992cd7e76c4c633b6bd4b4d89c9. 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/ITR632300560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66073309f5988e627e596e2e0f1fb40de1850c476c9278624f82f2f544cb2e2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAHQ2305010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1decdb31579cc1113f802d810a9ad4eea935bf6edf3ac193c5e7bb25e8e8ed72. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAIA2463608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b87d2f988f863fbd305a9526eb0079c35e8b77df765d7a62a022e9b65a6152. 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/ITZ0X2490301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5699f267293f04efeaa08dc3649307261f6b6cb482614e79ffdb62738f2194fe. 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/ITR632401443.