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 0xa3e6455a7593ec8df79c79acdbdddd486342fbe169f5cb20760ea786e3dca405. 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/89844469-3b81-44b6-ac2d-289759ec18e1.json and https://artists.proofprofile.net/proofs/artist/89844469-3b81-44b6-ac2d-289759ec18e1.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 0x43595deb96759f99df0ba637da61b3a3af77f3eea886a908052cde85748e558e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBWUL2504632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc294c2dfe981f94cbbbca4c39fb36ecaff3733934b096d066d32a99bd3246013. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:45Z), 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/GBWUL2504775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74db0e1196c8326872bf97879fc5c2bfdb75835682513a808f8be5ea92a27ff4. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GBWUL2504850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65175ad90cd3a09b21983b7494da6d74bea07c1c1d6785825132cbfdb0b20fad. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:07:05Z), 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/GBWUL2504860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a1181829b8a210ee773dbe349adbebdb336c7a3fdc633e17525997c14a5387. 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/GBWUL2504871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8480921de354272fa293d1c02202204df6d47a3583de807797fd40f5562504b5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBWUL2504880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8892703024142e30f5f76e840725f714659627e1bacc83fc233f9b461b93295. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBWUL2504888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e87a0a662e5f5bd7fa9df3e746de0af6228638d34265921db1ac29fcd5f60d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBWUL2504900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf83f04c278e1d25738ee19a9184cb4c55d43ce9e75da6fc60ad1a10e595a90. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBWUL2504909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7243cde2f758c108e6fca30e98b62a0e65d0f1976aa9206af14e26605a97099. 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/GBWUL2504917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289c064d005d743329d973e24b24a5183b1b644551435eb0456e572cdb0660ea. 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/GBWUL2504925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e669bb96076aec8e3b4d4bc3bde219348a49b044eb7ad311bdf858a5ca5c2e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBWUL2504931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c9d6018838bb3b518e1bcca52b1e7e607adb71658e99befccad84e72864bed. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBWUL2504937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47e49c4aa9aa271e46f7eeb17a9d467ecf401a7be8b2536efb303bab8a36963. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:55:09Z), 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/GBWUL2504942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da859bf00396f5571827acf684d88e600972d2133d99d15202c50f6e0c24054. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:20:06Z), 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/GBWUL2504966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bbd224585c894172b009434da4875a3ff02f029ebca848882a4f5ed28fd55e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:24:23Z), 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/GBWUL2504968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90edd521506976373003c397a54090336f3dd6796ea91c012f84b6f8a87727a7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:01:12Z), 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/GBWUL2504980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7675e8b5a08175673f814365d7bec4f2044a6b8db232d77d9c16254c9b4d7345. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:09:21Z), 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/GBWUL2504984.