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 0xefc52c0921015021d60e9bd0b57518e9a713ea375b829a1bd9cd5838dcc8e361. 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/fc4d9acd-314a-4c9f-ae3b-dec70d037233.json and https://artists.proofprofile.net/proofs/artist/fc4d9acd-314a-4c9f-ae3b-dec70d037233.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 0xc9859f2e354f4afbb9a53fb5d5a5a2756f432043217965aec559ed89f80989b4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:00Z), 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/ITP841900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237471e7aa403f1c795dd5434778a1255b1a6dead4e7688cfc0d5dcb44859c02. 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/ITP841900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7805c81cad1296970cf4ef8840b6928ff2096e3bb23114335b7a804fe1020f4. 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/ITP841900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99b4b11addf7c240464108758e9d2dc37fb2d237dba8ab988e4e9bf6fe2ce4b. 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/ITP841900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea4d6bf1aff398b206432f376e4e5119d790164eebc8caae91019fd2b41baa5. 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/ITP842000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c8df3ea15487a0d756a3da82c4cecce02c3c6fd3561e05d5363b059f3dbe63. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITP842000175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151db3d4a6a1108f60280f0e6ca59913855a79d515c888725ccf1576cfdc672d. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/ITP842000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82aa8d0c1c6d7758b26b6bb4d0a266d797aeee7b583c313ad4383a7c18d58e59. 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/ITP842000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371dda9f60a24e3e3968c9719a82fa54580775fe6a5690612aed867304cc4987. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITP842200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11b4f31dde7378612f88800016ad1327e28c1de38cb03cf158cd9a5394b5f03. 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/ITP842200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006a80652741d238beb1e88405d2a542f45c4ab5ef9cfadac5783d0dbca13492. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ITP842200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c37b5a19dad1e1c651914f0c7c66655b51c2d6c1a1a105bb81ea0ea6c2842a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ITP842200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61becea547f780ec51b0e2bcb4e5c8ee0344abf7f50d4f3b2030721c95be1b5a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:09:34Z), 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/ITP842200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5601af4761ea06b61e8c52c166bd6f6b799c6afa4d0d46a9b01e700a594aa014. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/ITP842200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6de241ec38ab451eee29e5558dec227a9b61da8d129284cdd67e505ca6fa850. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:44:32Z), 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/ITP842200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440f426f57171fa35090c47518b24e7c445af86a3a269203906ac63be3200556. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:25:42Z), 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/ITP842200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24514ad8a5c3944676e8a48050ed98e50ecd8f8ffc119b81d999d21123eb6df5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:22:28Z), 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/ITP842500059.