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 0xf7875aba603f2d39c31f242d7994e7531fdce82c43472415a63c46e4b4b9fffd. 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/e9fddc9a-b93a-4850-8496-ac0b7055234d.json and https://artists.proofprofile.net/proofs/artist/e9fddc9a-b93a-4850-8496-ac0b7055234d.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 0xb96a9437c9f74ce9cf9b121bc73f90f82b5f718f6446e9a8e137284b3de45f3e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6DC1523264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4f3550c25e88fa43bb3e4f82d592abe30339f6fa9918c29b11636b8ed10a48. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6DC1523265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac778b508e09f25929c5a9c7688731d0e22308e1ff85bab944cbf8a48c0cabe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6DC1523267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d730d24ea29df61abc969c056cf588f5d6959a7b63b4f11d77382ce742d79b5. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QM6DC1523275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f32cd1b6eea4966174651927d1117d426974a5db4ff3c0ae0051be778863264. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:01:48Z), 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/USDHM1816272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529385fab9adf327754de347562ddfa587f479f1e605479acc816dce62e220b5. 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/USDHM1816275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4ded7cf81836f308d4c81f61ca8e613f630527b86f6acab98d2a5f18dc2beb. 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/USDHM1816276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce772f0f7faad1d46a46ca0e94efe2e4c25687fbef16f3937ae5504852c87f59. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:44:20Z), 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/USDHM1816279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8391b8562e30007e75303fa54d0fc309aae99eed0fdb07ffbd480f93832d8487. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USDHM1816285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd023547f2a57c3639cdf14f3705c5349e36872e8784f67371f103b649b3215c9. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/USDHM1816758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35765b44c16c08d0749224970adfddc52f00fdce1b7e6ec901bb9295e5b7b892. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USDHM1816760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2f25e386370638023b0414f3d5fcae06645958dc35d655ae792369a70ff95b. 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/USDHM1816764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e4d18ad061843f2d3248a7be50503baf9af3259af54774c848943ae1370f5d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USDHM1816765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e71d1c2cde4d9f34b12ba3b97bc547b8b4ed10b34bd8817f42dc171f4cd4441. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:10:20Z), 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/USDHM1904177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e15dc3e365044b1d4d5cf52bf601058651c111363fdab7c76b28c411a2d507. 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/USDHM1904185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5992c179e775af9f416e2db6453db1af7317baf8689fac4767becdda7c95ab52. 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/USDHM1904186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1026c56b44b78a862430e4e233f5770feb603bed0076cdfc248992fc2407fc25. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:53Z), 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/USDHM1904190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ef3d1c2ed9f94345c9c5ef1367e1b4de53f840853a1bab13a94fea4d963270. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USDHM1904191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb977f75c8c579c2c9e8621f7eaa7cfdd98de674c5e301570e7cc8220c3e8762b. 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/USDHM1904193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf134fc2620fed6a38f813c8df429b7ce51427028a5ac10ec342b979ef8b6d063. 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/USDHM2007524.