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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3804e6145683c405911dff40a8ff7e20be2757bd563fe27838d2d7fe1d3ec22d. 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/28bd4582-73d9-4be3-86eb-6e0121352eae.json and https://artists.proofprofile.net/proofs/artist/28bd4582-73d9-4be3-86eb-6e0121352eae.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937f5dfaa16b24ca51f18837085fa126d861d09c3e7b1b8558f8fab9dd28ffd6. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TRAVP2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081c52b80cb9eaf962eb405c8bf9affa7455b857c325f128ac27be03ba0e4b70. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TRAVP2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356fb4e06c72a44785eb16b6f5683ada386b49274cd20f7daa572a683062eebc. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TRAVP2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0637c54626c16da0a2944962bab27cb8d2239d79331a878823db3d9e4802204. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TRAVP2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892900264fec6966e7dfb9ce72885e43c13163e5405d6265dadd296f23f3f9f1. 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/TRAVP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b546ab7f76eff19a896dfdeabe24fc0adca0247b59f9f2cc1c4e013a8a0b271. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TRAVP2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161c721ae2fed04d099b36c35e5447ff8f787b5caaf479290c718ba8fc94fb6b. 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/TRAVP2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dfb30b75e7f5e702dfe3b16243f96f551534a964d32d6a63c2a843584b7285. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TRAVP2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001a1ea40261ec339c17701905b1f3aa339b105e3b8a10b59a8e84845687bec9. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TRAVP2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bc96471801ffb24430458d5c87527b449617ce3c571ddc9deb65ba850444f2. 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/TRAVP2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b75e88455ed96adf5c83842f30c8168eca8616f1a1e96d721575cee2d66dbc4. 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/TRAVP2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11de5b8606e66892a0a239bb0ad7483ca2b19f129e91683faddf4b6304bde3a. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/TRAVP2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f3abde3c321708026719edb2bf4c108f6ff90249839ef665470d8acbad35ed. 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/QMBZ91942773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf185fd1feb10ba09f2b01cef65a3f424d0bb8f68734aa9b3e2dd0db998dce46. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ91942771.