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 0x7ba70eb4f1867adcd632a2628d4008da192068d9e043b030ff5d30c7b03f47e1. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfef5cf9-6595-4c82-b906-4704f453a81e.json and https://artists.proofprofile.net/proofs/artist/bfef5cf9-6595-4c82-b906-4704f453a81e.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 0xe3d99b23da8276319de5272275925a775a8fbee4e7507108fe3412dfc22360a9. 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/QZPJ32366534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e3aac2bc870c3ace5b28fb8f6ffb749748bdea4851c3882ff137bbba4214f4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:24:59Z), 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/QZPJ32366535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cd973fc112c841e3d31fe3785e65a7fb328905db14e56b99a15f19444d2db0. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:57:09Z), 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/QZPJ32366538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf406d7962490de9c10b8518e1b41e7d6f246f6b2fb07ff3171b13687967edc28. 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/QZPJ32366545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2c8b507c17537158030bd6666647b805bcf14060c71c621528b279a01a8a88. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZPJ32366546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c14681090ca3d2baa355fb328616db6bb6d6ee98dcd8414849b92cefc3ca67d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPJ32366549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce324449b3ba796405ac260f1a29362e8eba52f7b314bddb48579e8110c93c8. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZPJ32368155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef59f40ffbada586c79af01f767313cbc2930d55964fb754d31b4b88a07d627b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPJ32368157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84efcb771a54ba28be88b0dbd83da147c652486e03f2a1a237dee94f35ffb07a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZPJ32368161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced06b00c9c2b8300ccad207c78b5e1526f0f67effdc360585738ca78a69db44. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:55:29Z), 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/QZPJ32368163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878b708274084bf2103ec80b9358e577b83d68fbe5b4149955f24292a39cac49. 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/QZPJ32368164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87909aaaa3311c4cde320a267876f9f8452eb7cf1ccb448a5f73aa0679e82e88. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZPJ32368165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb37a8fc07e27ebe3b0c347f9f4716c4996c9703456c1d98776f7d9dda40ca5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZPJ32368171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a07b24f39c63935c5a6872a13878e08483585c4711f805155630be23da0049a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZPJ32371273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc40179b2a11a932ffc92421fbcae231923824b236f298130cfad06196e7365. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPJ32371278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63057e2afa63ab4e2a92299d1e1671cc6415c9b6d306e9521178121e84737fa7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPJ32371280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ba2e1e07fecfc68cdc59f483e87521418316b7a24534ced9a709c7f99f8539. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZPJ32371284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2505d47fdc506eebef9d842a893a4e80e79097611a9250c089ef9bf6081e5. 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/QZPJ32371285.