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 0x796385218eb2001139d7a20b5417dd97894808d85b5596348be1c6b1dbf333fa. 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/85a13f92-ce1a-4b68-90fe-8b43b953d82d.json and https://artists.proofprofile.net/proofs/artist/85a13f92-ce1a-4b68-90fe-8b43b953d82d.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 0x3f7f7339a36efb75d4c63ac1252e71727a6c1bd119ff2c51f99f653b9575c1c2. 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/NLZ1Q2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524afa8d10d6915fe1d18acc6856f4cc782d5a1a585712227837f1ab8a594d26. 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/NLSB71800196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5935146049e92bb634c9dba0067de9c2d6d25d0d6ae8cd8771c4dd68a7dc6d6d. 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/NLSB71800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8387fde1202fd9e2a06acf5f34200a2949581a40509132163af2a002915c583. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/NLSB72100384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea0b661ff4b46e8e91adc81117f486a34bfbd1c70043b0310913e6a4154e64f. 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/NLSB72100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8912ae7be0ac20e3cd573bf094522c419f0a5a0cf10622df096d29e478efa2ae. 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/NLSB72200563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa034b3cb43d187d703f5f87664c5294e01e1ee7f790431d6f50e655f5d369c49. 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/NLSB72100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa1bbdebcc8b405c9c7caafc86188a080c703f46bb7fef5b49b81876d613031. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:38Z), 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/NLSB72100408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b30e8a38f112550e8fd94bd636b6d1453da0082a2c32c624b7333c98476983. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/NLSB72500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5f742ff365158363eb35268b6c9be2857fab653aadc3d40f78b871916f42cf. 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/NLSB72400628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f84146f2a3a0d53171c824c841ff4fa598e2cb1fa658946d5fda39deda19b1d. 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/NLSB72500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0944599373a839fecb3fc7447516d33819e3500954feac9ca72524ebafeda278. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/NLSB72500223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5f0ff561d26f9caa458d84f52e0ad6e73e103f47f26d82a06b0d9d73983826. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/NLSB72500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee61451018be146fb0a96e813882b618f1f645f9dcbfcb0cdf643975eff2bcd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLSB72500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceeb6e04c6e65e0a8c0a66e999a435f0dbc6d8569273b7c16d4b8c48d1fbbda. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:06:46Z), 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/NLSB72500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c091bdf08cf1592178c8501fdd57ea323b1365d49fa8db32b69eae52496862. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLSB72500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061bc6090c5bcc201ef12da5e364655c93b1395e6905a5e3905daa6bec9dbf84. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/NLSB72500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e99c6af5841e79d73180ef1ecbe55055f7db56fc88b1ed55f9f8c30d13c6b77. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/NLSB72500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308f5c035bbe341701868df4cdd62abfd7db259e02492f452b287e97d568323e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:59Z), 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/NLSB72500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b1a552792b0a32cd38e28453b6f6c8c73955038551cd509fa1eb773fcfc51c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NLSB72500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1384b42b8a163aa5bcdac4a160309c6f37a2b6ba5cd4f1845544cd3e373cceea. 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/NLSB72500232.