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 0xe649475e2e5065cd4d6f02f5bcd3fde37981cc414586b52015dafebd72beffa8. 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/c0e50deb-e541-4455-94eb-3b925335a2cf.json and https://artists.proofprofile.net/proofs/artist/c0e50deb-e541-4455-94eb-3b925335a2cf.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 0x016cacb1f644b712b6e320bbd15f8663e2e406021f08b635f3f53844a18e3866. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCACN1604388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e561f8abe3834398e74eb83d6871a628a5c6c0980478937501cfb6448e9a8f. 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/FR9W11811321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb68eca4135558bb00224810ede0b12bf7a7cc10acd0cb2782466f2e598a258e. 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/USA2P2009285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450a8b2005e652793551ce51f2970754ebfa7e0b7a2647aa125366e01a5658ba. 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/GBKQU2167255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6839c9dd2b36f458f4d1a626c02dcb38c95613447b1f86140e4f584b8d5cb44. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBKQU2167264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9840d25dfcc33efb2890c5bf687224c2ba1632637ee2c388375943a59ecc49e5. 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/GBLV62134262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d4c51bdcca28dc4b91c4dad4a13f5462cc17f71eaae7350bcb03b9b7253299. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKQU2221851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0529e88351c666c8c6de4a2521a5c4f24542331d3eb07bd4bef239178c5a3994. 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/GBKQU2221854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be3e399acadea7467e1a9e4792cd0e42433b9109046e6e8c1de738a5a2abfdd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWDD2239100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd898306ce18baddfb8a3b2fe549ed804c2ebc87873146ef516c4ac5b643c1ef2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWDD2388462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20434b4d0a87c05979e2f7efa58ca3edf09d5bedc024d26ee83424aeba48d681. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEXN92436385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edc53723ccaad26b92267c1f2e3eaa140e05f2800ab623c350ffc602f233ae3. 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/USA2P2027067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d4c51bdcca28dc4b91c4dad4a13f5462cc17f71eaae7350bcb03b9b7253299. 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/GBKQU2221851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f14c7ffb4f6ebb4e5a39a2dcaa82d151df0ac8207a806ccbc3bc5c513686359. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBRKQ2230810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e839c83fc47e0d96fa38af2910d544b69ba0a01642ab400de6cbff8ed60e9b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM42K1934174.