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 0xb90d808b456afc6718d87eabc62936e5e3d8d5b86527bcdc73f931a642b93608. 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/c95ffea2-4069-41eb-9dca-661f24ab3d31.json and https://artists.proofprofile.net/proofs/artist/c95ffea2-4069-41eb-9dca-661f24ab3d31.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 0x8d2400052c1b72d9aeb9a935beefa70594bfaddd834d3ee2565dc5e9f13d63d1. 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/FR59R2469646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850cd4bb72f7ad27f1ae61337720fad1e331ed0d82eee6ae663f98ba96d23416. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR59R2469647.
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 0x4ed0d840d586b214a5e08dfa5a1db1fec4fdb3237bee5ebe503dffc71d9b699d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0H2359250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48b4e647df804630a40eb6be88ec88b3aa34ca8bb0149972acef057eb85d58e. 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/DGA072426908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51270f6d616d2a06682e263cc3b66ae702d90ccd871825392e32047d7d8c93ae. 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/DGA062479130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbf483ebf232fe798ef2f9c3cdf63ffacf06484085c0dec07d17c6be45c51a0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR96X2441733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4e9dd2daca6b502027aa5fbc2722cd16f531e26bad8ff9619c57fb4adbedfc. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FR96X2441732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc392b0558d40990ccce66ea1f64cb45e61d97ae82e042e2728a7413404b246. 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/DGA0L2320641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9551ffba0e04946ed7b2535fd389ee03a8743e1de9f7cf1a8594262a4e381722. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA062397252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5837930262376fb1a85b12fba39a5bfb3083213fe567046f9d4cdc0e96cb3d70. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA062304068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aa1a05ddc7ad77db459ca6df9e14256f2b943d2461d1caac300e07638708fd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX202314164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e1ff6ae1fcd1674ce84869dc3ad528a70ac52a525a1c486c656b97820071bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732262996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d64c24f559ca431cefbdb8d2bf907099c4339590da4f60b3b106810d26c0317. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HKG732262995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2007a0315ab1ef373385fdf50959c7a5cc81cd7e054250a391c96fdf695b3193. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732140792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1953d0c1e9ad3ecb9daa8ee5700ca7dc8ab3cb99caf84721c05d71f15680973f. 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/FRX282500691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37972545800961222f41cc854024d5474460afc7ad7c766a4507d3a288c5a50. 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/FRX202587543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbeb1871bf15fe0780cb78bb163dbf3bcc6201115de478dd7c67703948382db. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRX202587544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d483bb031c50142dd488107a0576d9f3f7457d0c5b3690451fcf88b46580b12. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX202586478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e45e6aec52bde1891e67fda5d55f1d74a0bf13939d70dedcbece7f638e1085. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FRX202565096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa2c7f289b87ced249534d8ca305a754044689f21fa80bb2043efaded1ce8b9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRX202565095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cea4d0736bb97da1120704a0b1c119a9cbf243157d0506b7784ec7a7934e61. 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/FR59R2531613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ef38f09651a343a25857b3f2e0415d880c9b56632b807701ee7d664fb3c684. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR59R2531614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3141c829fae39ed4e63d3c46435526832c7a5e956151bd45b8f2aa3c0ab93c33. 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/DGA0R2409189.