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 0xbaebc12601598b4bba28306e39176f00da608702ed63ce0bedc3b428214fc9ac. 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/f7aaf4be-675d-4f32-a3d5-b128bc2bc6d9.json and https://artists.proofprofile.net/proofs/artist/f7aaf4be-675d-4f32-a3d5-b128bc2bc6d9.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 0xdbb946e237d97656f9ce6a4a21a8d5e6e5da2032fedd6ac061b0bef3e68d3632. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USA2P2203788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3ec41a5ecf2844941fff15af8fb64260f5701acff10cd1a0750ce1af2002c6. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USA2P2231557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb666ffaa2b35f2aedbdb952c187eb38a92ca2505a580fd6db9520a53acdaf319. 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/USA2P2260371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494ead2f9a9f98840d75d59d4a59e43b99ae745dde1ff0cb9d003e1487b3049a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USA2P2262758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd78165d19cd1a28d9d20cc0d646cfdd74afea322d211a1a91c4765ca468bc6d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2264468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38589878dad2a4720cf847f07bc57c1ad98138345a870cc66acec4d0df83183a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/INS182300552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e746e294af640ca63f23dce050654350ad0bffb7e04eb53ef5396412bb7e40c. 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/USA2P2331916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe06b65f466cbef3d29f4b0ab6cb100403e5d99cfd7695f53b44281ccb98d38. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USA2P2345748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0837696be416b4da93d0b558f05412ff09df5cca7ddc86f7476e379b9ac52d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/INGC12303348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1016ed18f15942fb16250f9addb1270f9cbac95bc1dd2f9b1d83ec6cabcbfa. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USA2P2416236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aac26ecdecc48b3e2d0689af8e111b4b2adbca44bd3e28b23b345e54a036bd. 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/DGA0T2450638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33614248fa85c78d01a5ea881648f37f0d2ec81afde5f7eea635cbd84a70d034. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/FR2X42548370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa467566d070d1d6a344fff1935ee69fbb910587a0ddbce1edbe0be2d3b97b331. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/INN242508681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2b371bb0652d7f9fc4ff5784e87c7b5033caa73085a5f8c7da3693d44e4122. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR96X2594796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b3fe81dd1435868df7ea837b13537ad13f6b1f02fb6d52b7774388f1691c8e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/INK722407019.