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 0x81ffd77c60cd4a35ad8d4348782a264537e5ea29eccf2d1f258e051b6e8473f5. 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/8cc4f648-e7f8-454e-a310-0f7f47215434.json and https://artists.proofprofile.net/proofs/artist/8cc4f648-e7f8-454e-a310-0f7f47215434.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 0x70bc65320209b829b3b2618fca4715c60da69a344717f428c0637c369e8d7576. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEQ2075408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59f3e9009e44503e141f57f350e493de21f32e2126aa2b04d200fe035ab0f04. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEQ2082881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa484846b03d33fd894a4a69784a5d52d5f43b20260f32f369d2abd4718ddc823. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZFZ42144387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2713c17b0ac7e81cc308a96dd7f1611cf8f530b19088a92ae94ac952915f809. 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/QZK6F2138113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e138a985291aed775cb7f9649a36835e1ba9f71512013bd4f69c7d5714ed24. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFYY2210082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef15c39eed8876b80ccc7277423476a7c17546c53ee80a02bef5750225fe040. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES52277732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b54ced5a73c66f98b626f5653f87a41b59c57655f541857f679939d5fe4bc3. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZES72213117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0109688d7a2d5ca54e63ee5d7a9fcf79ab7a601941af4f9e3d50add267b3d22c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:47Z), 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/QZHNC2209986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5281d98cb85681f5dc5c10c3bf4b6d6fa5c573e22d2d6c1a8075a9c9192e0994. 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/QZTAT2280075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e38b382b71acf65b0dceda304784087b34a5498a9e67a08a5d2362441250fb. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:31:43Z), 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/QZTAW2252288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f33515ebe9ee027ee5673be91af30ed2074d46d682a9c1613c72505584d5f8. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:06:34Z), 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/QZTAW2252289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0088fc3e08fbe9474fb5d8ad91c129131717a1cf14249be69b53da54a1c43a17. 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/QZTAW2252290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03443c24c9642fefaed6a880da08404987e2cac158c40bced31ff1b1ec553f22. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAW2252293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebe65c9b8d307e30000839b4e858e970bc28edeecd8295fcab01b63dde021a2. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:53:04Z), 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/QZTBA2240696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d0a15c0f877a61116b91c0953af21d7a6951ed6bd4453f1c9d14f63fd7648f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZHN62323514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf539fae02a52e8b3e4d02a2d1db3ecf2771b4efef2eb2e0e7fee62d82c817bce. 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/QZK6M2364858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe59f3a101fb295ba8254fa708b9eb9b7b231002a3f061e9a6c6a049e2cb4db. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6L2304518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7bd2513b01f7c9df100d62446f304f7c7a73b894c2dd97c16610c634d0d2fb. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZK6F2308128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4c64d573d88df73acf7fbef6be7faa7a3aad7e17b692168fad9fcd0d281205. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZTBE2355201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39d02b035cfa7ae9903b2e2edf3ec70d74e627f85d4463e6e9f4efb1ba065f6. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZTBE2355203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cf1863c9aa8ca46b1498099b6fab65b508392417ec5e26baee4893ba7586c6. 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/QZTBE2355204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6ff0d4cdabd0110e603a847748587aaf514b6ce07d51aec16074788f9aeee3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:22Z), 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/QZTBE2355206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86303ab2291bbb803a11656cb27f2157d44efefb13016cd80532ff2e24f1e3b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZWFJ2306422.