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 0x2e083a3b3bd0d4670c9333116c02517d344db8adb7d423a6d8a3154736b8f179. 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/b49a1084-fda4-43be-8425-b1f36ecfb45e.json and https://artists.proofprofile.net/proofs/artist/b49a1084-fda4-43be-8425-b1f36ecfb45e.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 0x19705e82c305aa5950c8dd750e50a86a1901ed258aa51400623856aaf0b5e9b0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:22:23Z), 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/TCAHA2346221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16861d6ebb215d759c987a025538c93dc68e6210a0d7ef462a962ca99de0fa66. 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/TCAHI2300731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb408cd702e2d576000d8f8293caf90426c38df09acb519cad84a8e6b8e361ba6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:54:30Z), 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/TCAHJ2344207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddaf1c643102eefe51367160ef6d93da2103a8eb60fee69bbe509c44ed80097. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:06Z), 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/TCAHK2305450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7434752475dee4354fc10f07c03fc9e34ab574e5a07cd5d77f6dd73e244a2654. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHK2303393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98945c6ec44a73274ff710044b51726fbdf2ac9aca90bc835f5f12b7576f86d7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCAHN2369361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a43c674b13fd20912a829b097daf2dc48e679aba615ef8f8bf3a45c7a0422c0. 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/TCAHO2340495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324cd3086af98e82198c607a4ce802f4f5ad31a77d0447795e3061586de47e18. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAHS2316490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cd2182bacc55adcf444261bcf94554db49c839063e3c93138a1c3c9caf5797. 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/TCAHW2495431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252a3011ff103772792e3f1779e67b53db57a77e99dd052efca6cc56080520db. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:47:09Z), 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/TCAHY2420477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a5a10d2256bc0b09f79df10f060d58af38d213d2107166a45019ac62f8e05a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:45:19Z), 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/TCAIE2472159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff35b909e92b0ce0fe28d6a8a412c34da87ff06426450f70e4e4a386b6cdef3e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TCAIF2491914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86613daccf3433f1b27bce50505f9bca4a0dfad132405fdf54a7c36215800d0f. 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/TCAIF2412326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242113411a16d9e1982b24874bf19b995be6de17d89a763b3543d66e360ccecb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJB2477171.